feat: Updated vuln style

Every other page under app/(app) opens with `p-4 sm:p-6 lg:p-8` and the
layout adds none of its own, so this page alone sat flush against the shell
edge. Its h1 was text-xl where every other page is text-2xl.

The findings list was a stack of separately bordered cards; it is now rows
inside one Card, separated by border-border-soft, matching the monitors and
workflows lists. Loading is the shared spinner rather than a line of text,
the error is the shared danger strip, and the empty state uses the same
proportions as the monitors one.

.claude/settings.json

@@ -0,0 +1,24 @@
+{
+  "hooks": {
+    "PreToolUse": [
+      {
+        "matcher": "Bash|Grep",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "C:/Python314/Scripts/graphify.EXE hook-guard search"
+          }
+        ]
+      },
+      {
+        "matcher": "Read|Glob",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "C:/Python314/Scripts/graphify.EXE hook-guard read"
+          }
+        ]
+      }
+    ]
+  }
+}

.gitattributes

@@ -0,0 +1 @@
+graphify-out/graph.json merge=graphify

.gitea/workflows/agent-release.yml

@@ -32,20 +32,86 @@ jobs:
                   mkdir -p dist
                   GOOS=linux GOARCH=amd64 go build \
                     -ldflags="-s -w -X main.Version=${VERSION}" \
-                    -o dist/keymanager-agent-linux-amd64 ./cmd
+                    -o dist/vantage-agent-linux-amd64 ./cmd
                   GOOS=linux GOARCH=arm64 go build \
                     -ldflags="-s -w -X main.Version=${VERSION}" \
-                    -o dist/keymanager-agent-linux-arm64 ./cmd
+                    -o dist/vantage-agent-linux-arm64 ./cmd
+                  GOOS=windows GOARCH=amd64 go build \
+                    -ldflags="-s -w -X main.Version=${VERSION}" \
+                    -o dist/vantage-agent-windows-amd64.exe ./cmd
 
             - name: Checksums
               working-directory: agent/dist
-              run: sha256sum keymanager-agent-linux-amd64 keymanager-agent-linux-arm64 > checksums.txt
+              run: sha256sum vantage-agent-linux-amd64 vantage-agent-linux-arm64 vantage-agent-windows-amd64.exe > checksums.txt
 
             - name: Create release
               uses: https://gitea.com/actions/gitea-release-action@v1
               with:
                   token: ${{ secrets.RELEASE_TOKEN }}
                   files: |
-                      agent/dist/keymanager-agent-linux-amd64
-                      agent/dist/keymanager-agent-linux-arm64
+                      agent/dist/vantage-agent-linux-amd64
+                      agent/dist/vantage-agent-linux-arm64
+                      agent/dist/vantage-agent-windows-amd64.exe
                       agent/dist/checksums.txt
+
+    msi:
+        needs: build
+        runs-on: windows-2022
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Set up Go
+              uses: actions/setup-go@v5
+              with:
+                  go-version: "1.26"
+                  cache: true
+                  cache-dependency-path: agent/go.sum
+
+            - name: Extract version
+              id: version
+              shell: pwsh
+              run: |
+                  $v = "${{ github.ref_name }}" -replace '^agent/v', ''
+                  "VERSION=$v" | Out-File -Append $env:GITHUB_OUTPUT
+                  # MSI ProductVersion must be numeric x.x.x.x
+                  "MSIVERSION=$v.0" | Out-File -Append $env:GITHUB_OUTPUT
+
+            - name: Build agent exe
+              working-directory: agent
+              shell: pwsh
+              env:
+                  VERSION: ${{ steps.version.outputs.VERSION }}
+              run: |
+                  $env:GOOS = "windows"; $env:GOARCH = "amd64"
+                  go build -ldflags="-s -w -X main.Version=$env:VERSION" -o ../installer/vantage-agent-windows-amd64.exe ./cmd
+
+            - name: Install WiX
+              shell: pwsh
+              run: dotnet tool install --global wix --version 5.*
+
+            - name: Build MSI
+              working-directory: installer
+              shell: pwsh
+              run: |
+                  $env:PATH = "$env:PATH;$env:USERPROFILE\.dotnet\tools"
+                  wix build vantage-agent.wxs -d Version=${{ steps.version.outputs.MSIVERSION }} -o vantage-agent.msi
+                  (Get-FileHash vantage-agent.msi -Algorithm SHA256).Hash.ToLower() + "  vantage-agent.msi" | Out-File -Encoding ascii checksums-msi.txt
+
+            - name: Attach MSI to release
+              working-directory: installer
+              shell: pwsh
+              env:
+                  TOKEN: ${{ secrets.RELEASE_TOKEN }}
+              run: |
+                  $api = "${{ github.server_url }}/api/v1/repos/${{ github.repository }}"
+                  $tag = [uri]::EscapeDataString("${{ github.ref_name }}")
+                  $headers = @{ Authorization = "token $env:TOKEN" }
+                  # gitea-release-action can't find a slashed tag, so append via the API directly
+                  $rel = Invoke-RestMethod -Headers $headers -Uri "$api/releases/tags/$tag"
+                  foreach ($f in "vantage-agent.msi", "checksums-msi.txt") {
+                      $name = [uri]::EscapeDataString($f)
+                      Invoke-RestMethod -Headers $headers -Method Post -InFile $f `
+                        -ContentType "application/octet-stream" `
+                        -Uri "$api/releases/$($rel.id)/assets?name=$name"
+                  }

.gitea/workflows/chart-release.yml

@@ -0,0 +1,221 @@
+name: Chart Release
+
+on:
+    # Every push that touches the chart is validated. Publishing is separate and
+    # deliberate: a chart version is immutable in the registry once pushed, so
+    # it must come from a tag someone chose, not from whatever landed on main.
+    # No `paths` filter on push, deliberately. A paths filter applies to tag
+    # pushes too, so tagging a commit that happened not to touch the chart
+    # would skip the publish entirely — a release that silently does nothing.
+    # Validation is seconds of helm rendering; running it on every push to main
+    # is cheaper than that failure mode.
+    push:
+        branches:
+            - main
+        tags:
+            - "chart/v*"
+    pull_request:
+        paths:
+            - "deploy/chart/**"
+    workflow_dispatch:
+
+env:
+    CHART_DIR: deploy/chart/vantage
+    HELM_VERSION: v3.16.3
+
+jobs:
+    chart:
+        runs-on: ubuntu-docker
+        container: alpine:3.21
+        steps:
+            # git for actions/checkout, curl for both the Helm download and the
+            # registry upload, tar because the Helm tarball is not self-extracting.
+            - name: Setup
+              run: apk add --no-cache bash curl git tar nodejs npm
+
+            - name: Install Helm
+              run: |
+                  set -eu
+                  curl -fsSL "https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz" \
+                    | tar -xz -C /tmp linux-amd64/helm
+                  mv /tmp/linux-amd64/helm /usr/local/bin/helm
+                  helm version --short
+
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Lint
+              run: helm lint "$CHART_DIR"
+
+            # Rendering is the real test. `helm lint` accepts a chart whose
+            # templates fail to execute, and every guard in this chart is a
+            # template `fail` that only fires during rendering.
+            - name: Render default values
+              run: helm template test "$CHART_DIR" > /dev/null
+
+            - name: Render a multi-replica install
+              run: |
+                  helm template test "$CHART_DIR" \
+                    --set server.replicaCount=3 \
+                    --set web.replicaCount=3 > /dev/null
+
+            # The reaper deletes whole instances, so "does this env appear only
+            # in cloud mode" is worth asserting rather than eyeballing.
+            - name: Check the reaper is cloud-only
+              run: |
+                  set -eu
+                  if helm template test "$CHART_DIR" | grep -q FREE_INSTANCE_REAP_AFTER; then
+                      echo "FREE_INSTANCE_REAP_AFTER is set on a self-hosted render"
+                      exit 1
+                  fi
+                  if ! helm template test "$CHART_DIR" \
+                        --set server.env.deploymentType=cloud \
+                      | grep -q FREE_INSTANCE_REAP_AFTER; then
+                      echo "FREE_INSTANCE_REAP_AFTER is missing from a cloud render"
+                      exit 1
+                  fi
+                  echo "ok: reaper configured in cloud mode only"
+
+            - name: Render against external Redis and MongoDB
+              run: |
+                  helm template test "$CHART_DIR" \
+                    --set redis.enabled=false \
+                    --set redis.addr=redis.example.com:6379 \
+                    --set mongo.enabled=false \
+                    --set server.env.mongoUri=mongodb://mongo.example.com:27017/vantage > /dev/null
+
+            - name: Render with the Traefik ingress
+              run: |
+                  helm template test "$CHART_DIR" \
+                    --set ingress.enabled=true \
+                    --set ingress.web.host=vantage.example.com \
+                    --set ingress.grpc.host=agents.example.com \
+                    --set ingress.tls.certResolver=letsencrypt \
+                    --set server.env.grpcHost=agents.example.com:443 > /dev/null
+
+            # The shape the cloud deployment actually uses: a wildcard tenant
+            # namespace, /api and /auth routed at the edge, and no apex — that
+            # belongs to the marketing site, which this chart does not deploy.
+            - name: Render a wildcard host with edge-routed API paths
+              run: |
+                  helm template test "$CHART_DIR" \
+                    --set ingress.enabled=true \
+                    --set 'ingress.web.host=*.vantage.example.com' \
+                    --set ingress.api.enabled=true \
+                    --set ingress.grpc.host=agents.example.com \
+                    --set server.env.grpcHost=agents.example.com:443 \
+                    --set ingress.tls.secretName=vantage-tls \
+                    --set ingress.tls.grpcSecretName=agents-tls > /dev/null
+
+            # The guards are load-bearing, so their absence is a regression the
+            # same way a broken render is. Each of these must fail.
+            - name: Check the guards still refuse bad values
+              run: |
+                  set -eu
+
+                  refuses() {
+                      desc="$1"; shift
+                      if helm template test "$CHART_DIR" "$@" > /dev/null 2>&1; then
+                          echo "GUARD MISSING: $desc was accepted"
+                          exit 1
+                      fi
+                      echo "ok: refused $desc"
+                  }
+
+                  refuses "mongo disabled with an in-chart URI" \
+                      --set mongo.enabled=false
+                  refuses "redis disabled with no external address" \
+                      --set redis.enabled=false
+                  refuses "multiple replicas on a ReadWriteOnce volume" \
+                      --set server.replicaCount=2 --set server.persistence.enabled=true
+                  refuses "ingress with no web host" \
+                      --set ingress.enabled=true
+                  refuses "edge-routed API with an empty path list" \
+                      --set ingress.enabled=true \
+                      --set ingress.web.host=vantage.example.com \
+                      --set ingress.grpc.enabled=false \
+                      --set ingress.api.enabled=true \
+                      --set 'ingress.api.paths=null'
+                  refuses "gRPC ingress with no host" \
+                      --set ingress.enabled=true \
+                      --set ingress.web.host=vantage.example.com \
+                      --set server.env.grpcHost=agents.example.com:443
+                  refuses "gRPC ingress while grpcHost is still in-cluster" \
+                      --set ingress.enabled=true \
+                      --set ingress.web.host=vantage.example.com \
+                      --set ingress.grpc.host=agents.example.com
+
+            - name: Read the chart version
+              id: chart
+              run: |
+                  set -eu
+                  VERSION="$(grep '^version:' "$CHART_DIR/Chart.yaml" | awk '{print $2}')"
+                  echo "version=$VERSION" >> "$GITHUB_OUTPUT"
+                  echo "chart version is $VERSION"
+
+            # Chart.yaml is the source of truth for the version; the tag only
+            # says "publish this one". A mismatch is a mistake worth stopping
+            # for — the alternative is stamping the tag over Chart.yaml, which
+            # leaves the repository disagreeing with what was published.
+            - name: Check the tag matches Chart.yaml
+              if: startsWith(github.ref, 'refs/tags/chart/v')
+              run: |
+                  set -eu
+                  TAG_VERSION="${GITHUB_REF_NAME#chart/v}"
+                  CHART_VERSION="${{ steps.chart.outputs.version }}"
+                  if [ "$TAG_VERSION" != "$CHART_VERSION" ]; then
+                      echo "tag chart/v$TAG_VERSION does not match Chart.yaml version $CHART_VERSION"
+                      echo "bump version: in $CHART_DIR/Chart.yaml, or retag."
+                      exit 1
+                  fi
+
+            - name: Package
+              run: |
+                  set -eu
+                  mkdir -p dist
+                  helm package "$CHART_DIR" --destination dist
+                  ls -l dist
+
+            - name: Publish to the Gitea chart registry
+              if: startsWith(github.ref, 'refs/tags/chart/v')
+              env:
+                  # github.server_url is this Gitea instance, so the registry
+                  # host needs no variable of its own and cannot drift from it.
+                  REGISTRY: ${{ github.server_url }}/api/packages/${{ github.repository_owner }}/helm/api/charts
+                  # The same pair server-deploy.yml uses for `docker login`.
+                  # RELEASE_TOKEN, not REGISTRY_PASSWORD: the latter is named in
+                  # the docs but set by no workflow, and an unset secret becomes
+                  # an empty password, which Gitea reports as "Failed to
+                  # authenticate user" rather than as a missing credential.
+                  REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+                  REGISTRY_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+                  CHART_VERSION: ${{ steps.chart.outputs.version }}
+              run: |
+                  set -eu
+                  PKG="dist/vantage-${CHART_VERSION}.tgz"
+                  test -f "$PKG"
+
+                  # Checked explicitly, because the failure it prevents is a
+                  # 401 that looks like a permissions problem on the token that
+                  # was never sent.
+                  if [ -z "${REGISTRY_USER}" ] || [ -z "${REGISTRY_TOKEN}" ]; then
+                      echo "REGISTRY_USER or RELEASE_TOKEN is not set on this repository."
+                      echo "RELEASE_TOKEN needs the write:package scope to publish a chart."
+                      exit 1
+                  fi
+
+                  echo "publishing to ${REGISTRY} as ${REGISTRY_USER}"
+
+                  # --fail-with-body so an HTTP error is a failed step with the
+                  # server's explanation, rather than a green run that published
+                  # nothing. A repeated version is rejected by the registry;
+                  # that is the intended behaviour, not something to retry past.
+                  curl --fail-with-body -sS \
+                       --user "${REGISTRY_USER}:${REGISTRY_TOKEN}" \
+                       -X POST \
+                       --upload-file "$PKG" \
+                       "$REGISTRY"
+
+                  echo "published vantage ${CHART_VERSION}"
+                  echo "  helm repo add vantage ${{ github.server_url }}/api/packages/${{ github.repository_owner }}/helm"
+                  echo "  helm install vantage vantage/vantage --version ${CHART_VERSION}"

.gitea/workflows/server-deploy.yml

@@ -4,16 +4,90 @@ on:
     push:
         branches:
             - main
+    # Manual runs rebuild everything: there is no "before" commit to diff
+    # against, which the change detection below treats as "build it all". That
+    # is also the escape hatch for a repo VARIABLE change — editing API_URL or
+    # ADMIN_ENV pushes no commit, so nothing would rebuild on its own.
+    workflow_dispatch:
 
 jobs:
     deploy:
         runs-on: ubuntu-docker
         container: docker:dind
         steps:
-            - name: Setup Node
-              run: apk add --update nodejs npm
+            # git is needed twice over: actions/checkout clones with it, and the
+            # change detection below diffs with it.
+            - name: Setup
+              run: apk add --update nodejs npm git
+
             - name: Checkout
               uses: actions/checkout@v4
+              with:
+                  # The default shallow clone has one commit, which cannot be
+                  # diffed against the previous push.
+                  fetch-depth: 0
+
+            - name: Work out what changed
+              id: changed
+              run: |
+                  set -eu
+
+                  BEFORE="${{ github.event.before }}"
+                  ZERO="0000000000000000000000000000000000000000"
+
+                  # Build everything whenever the comparison cannot be trusted:
+                  # a manual run, a brand-new branch, or a force-push whose old
+                  # head is no longer in the repository. Listing every tracked
+                  # file makes every filter below match, so there is no second
+                  # code path to keep correct.
+                  if [ -z "$BEFORE" ] || [ "$BEFORE" = "$ZERO" ] || ! git cat-file -e "${BEFORE}^{commit}" 2>/dev/null; then
+                      echo "No usable base commit — building every image."
+                      git ls-files > /tmp/changed.txt
+                  else
+                      git diff --name-only "$BEFORE" HEAD > /tmp/changed.txt
+                  fi
+
+                  echo "--- changed files ---"
+                  cat /tmp/changed.txt
+                  echo "---------------------"
+
+                  # A change to the workflow itself can change a build arg, and
+                  # a build arg is baked into the image, so it rebuilds all.
+                  if grep -qE '^\.gitea/workflows/' /tmp/changed.txt; then
+                      ALL=1
+                  else
+                      ALL=0
+                  fi
+
+                  flag() {
+                      name="$1"
+                      pattern="$2"
+                      if [ "$ALL" = "1" ] || grep -qE "$pattern" /tmp/changed.txt; then
+                          echo "$name=true" >> "$GITHUB_OUTPUT"
+                          echo "build $name"
+                      else
+                          echo "$name=false" >> "$GITHUB_OUTPUT"
+                          echo "skip  $name"
+                      fi
+                  }
+
+                  # The three Go images build from the repo root and COPY
+                  # shared/ plus their own directory, so shared/ rebuilds all
+                  # three. proto/ is in server's list as insurance: the
+                  # generated pb is committed under server/, but a proto change
+                  # that someone regenerates in the same push should not depend
+                  # on that ordering.
+                  flag server    '^(server/|shared/|proto/|default_steps/|go\.work)'
+                  flag sitesvc   '^(sitesvc/|shared/|go\.work)'
+                  flag admin     '^(admin/|shared/|go\.work)'
+
+                  # The three Next images and the docs site use their own
+                  # directory as the build context, so nothing outside it can
+                  # affect them.
+                  flag web       '^web/'
+                  flag site      '^site/'
+                  flag adminsite '^adminsite/'
+                  flag docsite   '^docsite/'
 
             - name: Log in to registry
               run: |
@@ -22,16 +96,72 @@ jobs:
                       -u "${{ secrets.REGISTRY_USER }}" --password-stdin
 
             - name: Build and push server image
+              if: steps.changed.outputs.server == 'true'
               run: |
-                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/keymanager/server:latest"
-                  docker build -t "$IMAGE" -f server/Dockerfile server/
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/server:latest"
+                  # Root context: server depends on the shared module.
+                  docker build -t "$IMAGE" -f server/Dockerfile .
                   docker push "$IMAGE"
 
             - name: Build and push web image
+              if: steps.changed.outputs.web == 'true'
               run: |
-                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/keymanager/web:latest"
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/web:latest"
                   docker build \
-                    --build-arg NEXT_PUBLIC_API_URL="${{ vars.API_URL }}" \
+                    --build-arg NEXT_PUBLIC_HQ_URL="${{ vars.HQ_URL }}" \
                     -t "$IMAGE" \
                     -f web/Dockerfile web/
                   docker push "$IMAGE"
+
+            - name: Build and push site image
+              if: steps.changed.outputs.site == 'true'
+              run: |
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/site:latest"
+                  docker build \
+                    --build-arg NEXT_PUBLIC_SITE_API="${{ vars.SITE_API_URL }}" \
+                    --build-arg NEXT_PUBLIC_CONTACT_EMAIL="support@hostxtra.co.uk" \
+                    --build-arg NEXT_PUBLIC_ADMIN_API_URL="${{ vars.ADMIN_API_URL }}" \
+                    -t "$IMAGE" \
+                    -f site/Dockerfile site/
+                  docker push "$IMAGE"
+
+            - name: Build and push sitesvc image
+              if: steps.changed.outputs.sitesvc == 'true'
+              run: |
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/sitesvc:latest"
+                  # Root context: sitesvc depends on the shared module.
+                  docker build -t "$IMAGE" -f sitesvc/Dockerfile .
+                  docker push "$IMAGE"
+
+            - name: Build and push admin image
+              if: steps.changed.outputs.admin == 'true'
+              run: |
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/admin:latest"
+                  # Root context: admin depends on the shared module.
+                  docker build -t "$IMAGE" -f admin/Dockerfile .
+                  docker push "$IMAGE"
+
+            - name: Build and push adminsite image
+              if: steps.changed.outputs.adminsite == 'true'
+              run: |
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/adminsite:latest"
+                  docker build \
+                    --build-arg NEXT_PUBLIC_ADMIN_API_URL="${{ vars.ADMIN_API_URL }}" \
+                    --build-arg NEXT_PUBLIC_ADMIN_ENV="${{ vars.ADMIN_ENV }}" \
+                    --build-arg NEXT_PUBLIC_PADDLE_CLIENT_TOKEN="${{ vars.PADDLE_CLIENT_TOKEN }}" \
+                    --build-arg NEXT_PUBLIC_PADDLE_ENV="${{ vars.PADDLE_ENV }}" \
+                    --build-arg NEXT_PUBLIC_SITE_URL="${{ vars.SITE_URL }}" \
+                    -t "$IMAGE" \
+                    -f adminsite/Dockerfile adminsite/
+                  docker push "$IMAGE"
+
+            - name: Build and push docsite image
+              if: steps.changed.outputs.docsite == 'true'
+              run: |
+                  IMAGE="${{ vars.DOCKER_HOST }}/${{ github.repository_owner }}/vantage/docsite:latest"
+                  # DOCS_BASE_URL must match the proxy location that routes to
+                  # this container and the directory the image serves from.
+                  docker build \
+                    -t "$IMAGE" \
+                    -f docsite/Dockerfile docsite/
+                  docker push "$IMAGE"

.gitignore

@@ -1,4 +1,17 @@
 node_modules
 dist
 build
-.env
+.env
+.env.bck
+.env.live
+docs/*
+!docs/superpowers/
+.superpowers
+installer/vantage-agent-windows-amd64.exe
+installer/*.msi
+installer/nssm.zip
+installer/checksums-msi.txt
+.next
+*.tsbuildinfo
+graphify-out
+docker-compose.live.yml

admin/.dockerignore

@@ -0,0 +1,2 @@
+.env
+*.lic

admin/Dockerfile

@@ -0,0 +1,30 @@
+# Context is the repository root; admin depends on the shared module.
+FROM golang:1.26-alpine AS builder
+
+WORKDIR /src
+
+COPY shared/go.mod shared/go.sum ./shared/
+COPY admin/go.mod admin/go.sum ./admin/
+RUN cd admin && go mod download
+
+COPY shared/ ./shared/
+COPY admin/ ./admin/
+
+RUN cd admin && CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /out/admin ./cmd
+RUN cd admin && CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o /out/adminctl ./cmd/adminctl
+
+FROM alpine:3.20 AS runner
+
+RUN apk add --no-cache ca-certificates && \
+    addgroup --system --gid 1001 admin && \
+    adduser --system --uid 1001 --ingroup admin admin
+
+COPY --from=builder /out/admin /usr/local/bin/admin
+COPY --from=builder /out/adminctl /usr/local/bin/adminctl
+
+USER admin
+
+EXPOSE 8083
+ENV PORT=8083
+
+CMD ["/usr/local/bin/admin"]

admin/cmd/adminctl/main.go

@@ -0,0 +1,84 @@
+// Command adminctl performs the operations that deliberately have no HTTP
+// surface.
+//
+//	adminctl staff-add --email=you@example.com --name="You" --password=...
+//
+// There is no staff signup endpoint. A licensing authority that can be joined
+// over the internet is not one.
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/config"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"github.com/google/uuid"
+	"github.com/joho/godotenv"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func main() {
+	godotenv.Load()
+	if len(os.Args) < 2 {
+		fmt.Fprintln(os.Stderr, "usage: adminctl staff-add")
+		os.Exit(2)
+	}
+
+	cfg, err := config.Load()
+	if err != nil {
+		fatal("configuration: %v", err)
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	defer cancel()
+	if err := db.Connect(ctx, cfg); err != nil {
+		fatal("database: %v", err)
+	}
+
+	switch os.Args[1] {
+	case "staff-add":
+		staffAdd(ctx, os.Args[2:])
+	default:
+		fmt.Fprintln(os.Stderr, "usage: adminctl staff-add")
+		os.Exit(2)
+	}
+}
+
+func staffAdd(ctx context.Context, args []string) {
+	fs := flag.NewFlagSet("staff-add", flag.ExitOnError)
+	email := fs.String("email", "", "staff email (required)")
+	name := fs.String("name", "", "display name")
+	password := fs.String("password", "", "password, at least 12 characters (required)")
+	fs.Parse(args)
+
+	if *email == "" || len(*password) < 12 {
+		fatal("--email and a --password of at least 12 characters are required")
+	}
+
+	hash, err := bcrypt.GenerateFromPassword([]byte(*password), 12)
+	if err != nil {
+		fatal("hash: %v", err)
+	}
+
+	u := models.StaffUser{
+		UserID:       uuid.NewString(),
+		Email:        strings.ToLower(strings.TrimSpace(*email)),
+		PasswordHash: string(hash),
+		Name:         *name,
+		CreatedAt:    time.Now().UTC(),
+	}
+	if _, err := db.Admin("staff_users").InsertOne(ctx, u); err != nil {
+		fatal("create staff user: %v", err)
+	}
+	fmt.Printf("created staff user %s\n", u.Email)
+}
+
+func fatal(format string, a ...any) {
+	fmt.Fprintf(os.Stderr, format+"\n", a...)
+	os.Exit(1)
+}

admin/cmd/main.go

@@ -0,0 +1,129 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/api"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/billing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/config"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/hqsync"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/inject"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/licensing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/lifecycle"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	sharedmail "gitea.hostxtra.co.uk/mrhid6/vantage/shared/mail"
+	"github.com/joho/godotenv"
+)
+
+func main() {
+	godotenv.Load()
+
+	cfg, err := config.Load()
+	if err != nil {
+		log.Fatalf("configuration error: %v", err)
+	}
+
+	licensing.SetSigningKey(cfg.SigningKey)
+	api.SetAppLoginURL(cfg.AppLoginURL)
+
+	if _, err := paddle.Init(cfg.PaddleAPIKey, cfg.PaddleEnv); err != nil {
+		log.Fatalf("paddle init: %v", err)
+	}
+
+	mail.Init(sharedmail.Sender{
+		Host: cfg.SMTPHost, Port: cfg.SMTPPort, From: cfg.SMTPFrom,
+		Username: cfg.SMTPUsername, Password: cfg.SMTPPassword,
+		PublicURL: cfg.PublicURL,
+	})
+	if !mail.Enabled() {
+		log.Println("warning: SMTP not configured; verification and licence emails will fail")
+	}
+
+	auth.InitRedis(cfg.RedisAddr, cfg.RedisUsername, cfg.RedisPassword)
+	pingCtx, pingCancel := context.WithTimeout(context.Background(), 10*time.Second)
+	if err := auth.Ping(pingCtx); err != nil {
+		pingCancel()
+		log.Fatalf("redis: %v", err)
+	}
+	pingCancel()
+
+	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	if err := db.Connect(ctx, cfg); err != nil {
+		cancel()
+		log.Fatalf("database: %v", err)
+	}
+	cancel()
+	log.Printf("connected: admin=%s control=%s", cfg.AdminDBName, cfg.ControlDBName)
+
+	idxCtx, idxCancel := context.WithTimeout(context.Background(), 30*time.Second)
+	if err := db.EnsureIndexes(idxCtx); err != nil {
+		idxCancel()
+		log.Fatalf("indexes: %v", err)
+	}
+	// Legacy plans are re-keyed BEFORE the seed, so the seed's fresh
+	// (self_hosted, professional) row cannot collide with the legacy self_hosted
+	// row's rename on deployment_tier_unique.
+	if err := models.MigrateLegacyPlans(idxCtx); err != nil {
+		idxCancel()
+		log.Fatalf("migrate legacy plans: %v", err)
+	}
+	if err := models.SeedPlans(idxCtx); err != nil {
+		idxCancel()
+		log.Fatalf("plan seed: %v", err)
+	}
+	if err := models.SeedCatalogue(idxCtx); err != nil {
+		idxCancel()
+		log.Fatalf("seed catalogue: %v", err)
+	}
+	if err := models.Backfill(idxCtx); err != nil {
+		idxCancel()
+		log.Fatalf("backfill: %v", err)
+	}
+	idxCancel()
+
+	reconcileCtx, stopReconcile := context.WithCancel(context.Background())
+	defer stopReconcile()
+	inject.StartReconciler(reconcileCtx)
+	billing.StartPlaceholderReconciler(reconcileCtx)
+	hqsync.Start(reconcileCtx)
+
+	lifecycle.SetPortalURL(cfg.PublicURL)
+	lifecycle.Start(reconcileCtx, cfg.ReapAfter)
+
+	srv := &http.Server{
+		Addr:              cfg.Addr,
+		Handler:           api.Routes(cfg),
+		ReadHeaderTimeout: 10 * time.Second,
+		ReadTimeout:       20 * time.Second,
+		WriteTimeout:      30 * time.Second,
+		IdleTimeout:       60 * time.Second,
+	}
+
+	go func() {
+		log.Printf("admin listening on %s", cfg.Addr)
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("server error: %v", err)
+		}
+	}()
+
+	stopCtx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+	<-stopCtx.Done()
+
+	shutdownCtx, shutdownCancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer shutdownCancel()
+	_ = srv.Shutdown(shutdownCtx)
+	log.Println("admin stopped")
+	os.Exit(0)
+}

admin/go.mod

@@ -0,0 +1,55 @@
+module gitea.hostxtra.co.uk/mrhid6/vantage/admin
+
+go 1.26
+
+require (
+	github.com/gin-gonic/gin v1.10.0
+	github.com/google/uuid v1.6.0
+	github.com/joho/godotenv v1.5.1
+	gitea.hostxtra.co.uk/mrhid6/vantage/shared v0.0.0-00010101000000-000000000000
+	github.com/redis/go-redis/v9 v9.20.1
+	go.mongodb.org/mongo-driver/v2 v2.8.0
+	golang.org/x/crypto v0.54.0
+)
+
+require (
+	github.com/bytedance/gopkg v0.1.3 // indirect
+	github.com/bytedance/sonic v1.15.0 // indirect
+	github.com/bytedance/sonic/loader v0.5.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cloudwego/base64x v0.1.6 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.12 // indirect
+	github.com/gin-contrib/sse v1.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.30.1 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/hyperboloide/lk v0.0.0-20251220053519-b291812e3216 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.17.6 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.4 // indirect
+	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.3.1 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.2.0 // indirect
+	github.com/xdg-go/stringprep v1.0.4 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
+	go.uber.org/atomic v1.11.0 // indirect
+	golang.org/x/arch v0.22.0 // indirect
+	golang.org/x/net v0.56.0 // indirect
+	golang.org/x/sync v0.22.0 // indirect
+	golang.org/x/sys v0.47.0 // indirect
+	golang.org/x/text v0.40.0 // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
+
+replace gitea.hostxtra.co.uk/mrhid6/vantage/shared => ../shared

admin/go.sum

@@ -0,0 +1,149 @@
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admin/internal/api/checkout.go

@@ -0,0 +1,306 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/billing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/licensing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// checkoutOptions serves everything the browser configurator needs to price a
+// plan: the active plans (base allowances), the full catalogue (component prices
+// in the running environment), and the environment name so the client can refuse
+// a mismatch. The client token itself is baked into the adminsite build, never
+// served from here.
+func checkoutOptions(c *gin.Context) {
+	ctx := c.Request.Context()
+	plans := []models.Plan{}
+	if cur, err := db.Admin("plans").Find(ctx, bson.M{"active": true}); err == nil {
+		_ = cur.All(ctx, &plans)
+	}
+	rows, err := models.AllCatalogue(ctx)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"plans":     plans,
+		"catalogue": rows,
+		"env":       paddle.Get().Env(),
+	})
+}
+
+// createSelfHostedPlaceholder makes an instance row that exists only so a
+// checkout has something to put in custom_data. It carries no licence and is
+// flagged Placeholder until the customer pastes their install's real UUID. The
+// generated id is temporary; linking replaces the identity.
+func createSelfHostedPlaceholder(c *gin.Context) {
+	s := auth.Current(c)
+	var body struct {
+		Name string `json:"name"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.Name == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "a name is required"})
+		return
+	}
+	ctx := c.Request.Context()
+	inst := models.Instance{
+		InstanceID:  uuid.NewString(),
+		AccountID:   s.AccountID,
+		Name:        body.Name,
+		Deployment:  license.DeploymentSelfHosted,
+		Status:      models.StatusAwaitingLink,
+		Placeholder: true,
+		CreatedAt:   time.Now().UTC(),
+	}
+	if _, err := db.Admin("admin_instances").InsertOne(ctx, inst); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.placeholder_created", AccountID: s.AccountID,
+		Target: inst.InstanceID, IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, gin.H{"instance_id": inst.InstanceID})
+}
+
+// createCloudCheckout creates a PAID cloud placeholder and hands back its id so
+// the browser can open a Paddle checkout keyed to it. Nothing is provisioned yet:
+// a cloud instance costs real infrastructure, so it is created only once payment
+// is confirmed, by the subscription webhook (billing.handleSubscription).
+//
+// This mirrors the self-hosted placeholder, with one difference that matters:
+// admin owns the cloud UUID, so the id generated here is the id the instance
+// will keep. Provisioning on the webhook reuses it (provision.CreateInstanceWithID),
+// which is why there is no claim-and-rewrite step and the subscription's
+// custom_data never goes stale. PendingOwnerUserID remembers who bought it so the
+// webhook can make them the instance owner.
+//
+// An abandoned checkout therefore leaves only this row — no infrastructure — the
+// same cheap, reap-safe state a self-hosted placeholder leaves.
+func createCloudCheckout(c *gin.Context) {
+	s := auth.Current(c)
+	var body struct {
+		Name string `json:"name"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || strings.TrimSpace(body.Name) == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "a name is required"})
+		return
+	}
+	ctx := c.Request.Context()
+	inst := models.Instance{
+		InstanceID:         uuid.NewString(),
+		AccountID:          s.AccountID,
+		Name:               strings.TrimSpace(body.Name),
+		Deployment:         license.DeploymentCloud,
+		Status:             models.StatusAwaitingLink,
+		Placeholder:        true,
+		PendingOwnerUserID: s.UserID,
+		CreatedAt:          time.Now().UTC(),
+	}
+	if _, err := db.Admin("admin_instances").InsertOne(ctx, inst); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.cloud_placeholder_created", AccountID: s.AccountID,
+		Target: inst.InstanceID, IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, gin.H{"instance_id": inst.InstanceID})
+}
+
+// updateEntitlement sets an instance's DESIRED configuration and pushes the
+// resulting line items to Paddle. It does NOT issue — the resulting
+// subscription.updated webhook does, from granted. An increase is prorated
+// immediately by Paddle; a reduction is recorded as desired and takes effect at
+// renewal, so this never shrinks a live licence.
+func updateEntitlement(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	ctx := c.Request.Context()
+	var body struct {
+		Tier     string   `json:"tier"`
+		Term     string   `json:"term"`
+		Servers  int      `json:"servers"`
+		Features []string `json:"features"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid configuration"})
+		return
+	}
+
+	plan, err := models.GetPlan(ctx, inst.Deployment, body.Tier)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no such plan"})
+		return
+	}
+	if body.Servers < plan.BaseLimits.MaxServers && plan.BaseLimits.MaxServers != license.Unlimited {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": fmt.Sprintf("%s includes %d servers", plan.Name, plan.BaseLimits.MaxServers)})
+		return
+	}
+
+	desired := models.Config{Servers: body.Servers, Features: models.Features(body.Features).OrEmpty()}
+	items, err := catalogue.LineItems(ctx, paddle.Get().Env(), body.Term, plan, desired)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	// A live subscription is required to update. None means this instance has
+	// never been paid for — that is a checkout, not an update.
+	var sub models.Subscription
+	if err := db.Admin("subscriptions").FindOne(ctx,
+		bson.M{"instance_id": inst.InstanceID, "status": models.SubActive}).Decode(&sub); err != nil {
+		c.JSON(http.StatusConflict, gin.H{"error": "no active subscription; start a checkout instead"})
+		return
+	}
+
+	pItems := make([]paddle.LineItem, 0, len(items))
+	for _, it := range items {
+		pItems = append(pItems, paddle.LineItem{PriceID: it.PriceID, Quantity: it.Quantity})
+	}
+	if err := paddle.Get().UpdateSubscriptionItems(ctx, sub.PaddleSubscriptionID, pItems); err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": "billing update failed; nothing changed"})
+		return
+	}
+
+	// Record desired now; the webhook Paddle sends back promotes to granted and
+	// reissues. Recording here makes the portal reflect the intent instantly
+	// rather than waiting on the round-trip.
+	limits, _, _ := catalogue.Resolve(ctx, plan, desired)
+	next := models.Entitlement{
+		InstanceID: inst.InstanceID, AccountID: inst.AccountID,
+		Deployment: inst.Deployment, Tier: body.Tier, Term: body.Term,
+		Desired: desired, ResolvedLimits: limits,
+	}
+	ent, _ := models.GetEntitlement(ctx, inst.InstanceID)
+	if ent != nil {
+		next.Granted = ent.Granted
+		next.GrantedAt = ent.GrantedAt
+		if desired.Servers < ent.Granted.Servers {
+			now := time.Now().UTC()
+			next.ScheduledChangeAt = &now
+		}
+	} else {
+		next.Granted = desired
+	}
+	if err := models.UpsertEntitlement(ctx, next); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	audit.Write(ctx, models.AuditEntry{
+		Actor: auth.Current(c).Email, Action: "entitlement.requested",
+		AccountID: inst.AccountID, Target: inst.InstanceID})
+	c.JSON(http.StatusOK, gin.H{"entitlement": next, "pending": next.Pending()})
+}
+
+// claimPlaceholderLink binds a paid self-hosted placeholder to the customer's
+// real install UUID, then issues.
+//
+// :id is the placeholder (generated at checkout, carried in the subscription's
+// custom_data); the body carries the UUID the install actually reports. The
+// licence must bind to that real UUID (spec 1 has no unbound licence), so the
+// placeholder row's identity is rewritten to it and the subscription re-pointed,
+// then billing issues from the recorded subscription. Linking and claiming stay
+// one call here because, unlike Free, the payment already happened.
+func claimPlaceholderLink(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	if !inst.Placeholder {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "this instance is already linked"})
+		return
+	}
+	var body struct {
+		InstanceID string `json:"instance_id"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.InstanceID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "instance_id is required"})
+		return
+	}
+	ctx := c.Request.Context()
+
+	// The real UUID must be free across every account — the unique index on
+	// instance_id is the tenant-isolation property, so refuse rather than collide.
+	if n, _ := db.Admin("admin_instances").CountDocuments(ctx,
+		bson.M{"instance_id": body.InstanceID}); n > 0 {
+		c.JSON(http.StatusConflict, gin.H{"error": "that instance ID is already linked"})
+		return
+	}
+
+	placeholderID := inst.InstanceID
+	if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": placeholderID},
+		bson.M{
+			"$set": bson.M{
+				"instance_id": body.InstanceID,
+				"status":      models.StatusActive,
+				"placeholder": false,
+			},
+			"$addToSet": bson.M{"previous_instance_ids": placeholderID},
+		}); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	// Re-point the subscription rows from the placeholder id to the real UUID so
+	// billing.IssueForInstance finds it, and rewrite Paddle's own copy of
+	// custom_data — written at checkout, it still names the placeholder, and every
+	// later event on this subscription is decoded from it.
+	if err := licensing.RepointSubscriptions(ctx, placeholderID, body.InstanceID, inst.AccountID); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	if err := billing.IssueForInstance(ctx, body.InstanceID); err != nil {
+		// The link stuck; issuance did not. The reconciler and a retry recover it,
+		// and the customer is not blocked from linking. Surface it, do not roll back.
+		c.JSON(http.StatusAccepted, gin.H{
+			"instance_id": body.InstanceID,
+			"warning":     "linked, but licence issuance is pending: " + err.Error()})
+		return
+	}
+	audit.Write(ctx, models.AuditEntry{
+		Actor: auth.Current(c).Email, Action: "instance.placeholder_linked",
+		AccountID: inst.AccountID, Target: body.InstanceID,
+		Detail: "from placeholder " + placeholderID, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"instance_id": body.InstanceID})
+}
+
+// billingPortal mints a Paddle customer-portal URL. The account must already
+// have a paddle_customer_id, which it learns from its first subscription webhook.
+func billingPortal(c *gin.Context) {
+	s := auth.Current(c)
+	ctx := c.Request.Context()
+	var acc models.Account
+	if err := db.Admin("accounts").FindOne(ctx,
+		bson.M{"account_id": s.AccountID}).Decode(&acc); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no account"})
+		return
+	}
+	if acc.PaddleCustomerID == "" {
+		c.JSON(http.StatusConflict, gin.H{"error": "no billing account yet; buy a paid plan first"})
+		return
+	}
+	url, err := paddle.Get().PortalSession(ctx, acc.PaddleCustomerID)
+	if err != nil {
+		c.JSON(http.StatusBadGateway, gin.H{"error": "could not open billing portal"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"url": url})
+}

admin/internal/api/customer.go

@@ -0,0 +1,555 @@
+package api
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+	"net/url"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/cloudprov"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/inject"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/licensing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/provision"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// ownedInstance resolves an instance and confirms the session's account owns it.
+//
+// EVERY customer handler that names an instance must go through this. It returns
+// 404 for another account's instance rather than 403: a 403 confirms the
+// instance exists, which is an existence oracle over customer data.
+func ownedInstance(c *gin.Context, instanceID string) (*models.Instance, bool) {
+	s := auth.Current(c)
+	if s == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+		return nil, false
+	}
+	var inst models.Instance
+	err := db.Admin("admin_instances").FindOne(c.Request.Context(),
+		bson.M{"instance_id": instanceID, "account_id": s.AccountID}).Decode(&inst)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return nil, false
+	}
+	return &inst, true
+}
+
+// getMe reports who the caller is, for route guards in the UI.
+//
+// It is deliberately outside RequireCustomer/RequireStaff: the UI needs a
+// truthful 401 to redirect on, not an error page. It reveals nothing a caller
+// does not already possess, because it only ever describes their own cookie.
+func getMe(c *gin.Context) {
+	s := auth.Load(c)
+	if s == nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "not signed in"})
+		return
+	}
+	out := gin.H{"kind": s.Kind, "email": s.Email, "account_id": s.AccountID}
+	if s.Kind == auth.KindCustomer {
+		var u models.CustomerUser
+		if err := db.Admin("customer_users").FindOne(c.Request.Context(),
+			bson.M{"user_id": s.UserID}).Decode(&u); err == nil {
+			out["account_role"] = u.AccountRole
+		}
+	}
+	c.JSON(http.StatusOK, out)
+}
+
+func getAccount(c *gin.Context) {
+	s := auth.Current(c)
+	ctx := c.Request.Context()
+
+	var acct models.Account
+	if err := db.Admin("accounts").FindOne(ctx, bson.M{"account_id": s.AccountID}).Decode(&acct); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{"account_id": s.AccountID})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	instances := []models.Instance{}
+	if err := cur.All(ctx, &instances); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"account":   acct,
+		"instances": instances,
+		// Sent rather than mirrored in the UI: a hardcoded 3 in TypeScript is a
+		// second source of truth for a rule the backend enforces.
+		"max_relinks": models.MaxRelinksPerTerm,
+	})
+}
+
+func linkInstance(c *gin.Context) {
+	var body struct {
+		InstanceID string `json:"instance_id"`
+		Name       string `json:"name"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "instance_id is required"})
+		return
+	}
+
+	s := auth.Current(c)
+	inst, err := licensing.LinkInstance(c.Request.Context(), s.AccountID, body.InstanceID, body.Name)
+	if err != nil {
+		status := http.StatusBadRequest
+		if errors.Is(err, licensing.ErrAlreadyLinked) {
+			status = http.StatusConflict
+		}
+		c.JSON(status, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusCreated, inst)
+}
+
+func relinkInstance(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	var body struct {
+		InstanceID string `json:"instance_id"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "instance_id is required"})
+		return
+	}
+
+	s := auth.Current(c)
+	lic, err := licensing.Relink(c.Request.Context(), s.AccountID, inst.InstanceID, body.InstanceID, false)
+	if err != nil {
+		status := http.StatusBadRequest
+		if errors.Is(err, licensing.ErrRelinkLimit) {
+			status = http.StatusForbidden
+		}
+		c.JSON(status, gin.H{"error": err.Error()})
+		return
+	}
+	deliver(c, inst, lic)
+	c.JSON(http.StatusOK, lic)
+}
+
+func getInstanceLicense(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	var lic models.License
+	if err := db.Admin("licenses").FindOne(c.Request.Context(),
+		bson.M{"license_id": inst.CurrentLicense}).Decode(&lic); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no licence issued yet"})
+		return
+	}
+	// The owner gets the blob itself: it is signed public data bound to their
+	// own instance, and the download endpoint hands over the same bytes. The
+	// struct tag hides it, so the fields are listed explicitly.
+	c.JSON(http.StatusOK, gin.H{
+		"license_id": lic.LicenseID, "instance_id": lic.InstanceID, "tier": lic.Tier,
+		"deployment": lic.Deployment, "limits": lic.Limits, "features": lic.Features,
+		"issued_at": lic.IssuedAt, "expires_at": lic.ExpiresAt, "reason": lic.Reason,
+		"issued_by": lic.IssuedBy, "blob": lic.Blob,
+	})
+}
+
+func downloadInstanceLicense(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	var lic models.License
+	if err := db.Admin("licenses").FindOne(c.Request.Context(),
+		bson.M{"license_id": inst.CurrentLicense}).Decode(&lic); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no licence issued yet"})
+		return
+	}
+	c.Header("Content-Disposition", fmt.Sprintf(`attachment; filename="vantage-%s.lic"`, inst.InstanceID))
+	c.Data(http.StatusOK, "application/octet-stream", []byte(lic.Blob+"\n"))
+}
+
+func listSubscriptions(c *gin.Context) {
+	s := auth.Current(c)
+	cur, err := db.Admin("subscriptions").Find(c.Request.Context(), bson.M{"account_id": s.AccountID})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	subs := []models.Subscription{}
+	if err := cur.All(c.Request.Context(), &subs); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, subs)
+}
+
+// provisionCloudInstance provisions a real cloud instance in the control plane
+// and records admin's row for it, WITHOUT issuing a licence. Both the Free
+// create path and the paid-checkout path share it, so the provisioning — and its
+// unwind-in-reverse rollback — has one definition rather than two that drift.
+//
+// It leaves the instance unlicensed on purpose: createInstance then issues Free,
+// and createCloudCheckout leaves it for the paid subscription webhook to license.
+// The returned rec carries no Tier or CurrentLicense; the caller sets those once
+// it has issued.
+//
+// Errors are returned unwrapped for the provisioning step so the caller can still
+// match provision.ErrEmailTaken / ErrNameRejected; later steps are wrapped.
+func provisionCloudInstance(c *gin.Context, name string) (*models.Instance, error) {
+	ctx := c.Request.Context()
+	s := auth.Current(c)
+
+	var cu models.CustomerUser
+	if err := db.Admin("customer_users").FindOne(ctx,
+		bson.M{"user_id": s.UserID}).Decode(&cu); err != nil {
+		return nil, fmt.Errorf("read account: %w", err)
+	}
+
+	inst, err := cloudprov.CreateInstance(ctx, name, cu.Email, cu.PasswordHash, cu.UserID)
+	if err != nil {
+		return nil, err
+	}
+
+	rec := models.Instance{
+		InstanceID: inst.InstanceID,
+		AccountID:  s.AccountID,
+		Name:       inst.Name,
+		Slug:       inst.Slug,
+		Deployment: license.DeploymentCloud,
+		Status:     models.StatusActive,
+		CreatedAt:  time.Now().UTC(),
+	}
+	if _, err := db.Admin("admin_instances").InsertOne(ctx, rec); err != nil {
+		// Unwind in reverse: the owner first, because RollbackInstance refuses
+		// an instance that still has users.
+		if uid, e := cloudprov.OwnerUserID(ctx, inst.InstanceID); e == nil {
+			_ = cloudprov.DeleteUser(ctx, inst.InstanceID, uid)
+		}
+		if e := cloudprov.RollbackInstance(ctx, inst.InstanceID); e != nil {
+			log.Printf("provisionCloudInstance: rollback of %s failed: %v", inst.InstanceID, e)
+		}
+		return nil, fmt.Errorf("record instance: %w", err)
+	}
+
+	// Record the owner's membership. Best-effort: the projected user already
+	// exists and is what actually grants access, so a missing row here costs a
+	// line in the members panel, not access — and the boot backfill rebuilds it.
+	ownerID, err := cloudprov.OwnerUserID(ctx, inst.InstanceID)
+	if err != nil {
+		log.Printf("provisionCloudInstance: owner lookup for %s: %v", inst.InstanceID, err)
+	} else if _, err := db.Admin("instance_members").InsertOne(ctx, models.InstanceMember{
+		MemberID:       uuid.NewString(),
+		AccountID:      s.AccountID,
+		InstanceID:     inst.InstanceID,
+		CustomerUserID: cu.UserID,
+		ControlUserID:  ownerID,
+		Role:           sharedmodels.RoleOwner,
+		Email:          cu.Email,
+		CreatedAt:      time.Now().UTC(),
+	}); err != nil {
+		log.Printf("provisionCloudInstance: record owner membership for %s: %v", inst.InstanceID, err)
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.created", AccountID: s.AccountID,
+		Target: inst.InstanceID, Detail: "slug=" + inst.Slug, IP: c.ClientIP()})
+	return &rec, nil
+}
+
+// cloudProvisionError maps the errors provisionCloudInstance can surface onto the
+// customer-facing responses shared by the Free and paid-checkout paths.
+func cloudProvisionError(c *gin.Context, err error) {
+	switch {
+	case errors.Is(err, provision.ErrEmailTaken):
+		// users.email is unique per instance, so this means the address already
+		// owns a user in an instance we are not creating — a legacy cloud tenant.
+		// Staff have to attach that one by hand.
+		c.JSON(http.StatusConflict, gin.H{
+			"error": "that email address already belongs to an existing Vantage instance; contact support@hostxtra.co.uk and we will link it to your account"})
+	case errors.Is(err, provision.ErrNameRejected):
+		c.JSON(http.StatusUnprocessableEntity, gin.H{"error": err.Error()})
+	default:
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not create the instance"})
+	}
+}
+
+// createInstance provisions a Free cloud instance for the calling account.
+//
+// The ordering matters and each step unwinds the previous one. Licence issuance
+// and email are deliberately NOT allowed to fail the request: the instance
+// exists and the customer can sign in, they see the licence banner, and staff
+// can issue by hand. Rolling back an instance the customer can already see would
+// be worse than shipping it unlicensed.
+func createInstance(c *gin.Context) {
+	var body struct {
+		Name string `json:"name"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || strings.TrimSpace(body.Name) == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "name is required"})
+		return
+	}
+	name := strings.TrimSpace(body.Name)
+	ctx := c.Request.Context()
+	s := auth.Current(c)
+
+	// Pre-check the Free rule so we never create an instance we then cannot
+	// licence. licensing.Issue enforces it too; this is the friendly refusal.
+	//
+	// Scoped to cloud because that is what this endpoint creates. It MUST match
+	// checkFreeLimit's scoping — a pre-check stricter than the issuer refuses
+	// something that would have worked.
+	n, err := db.Admin("admin_instances").CountDocuments(ctx, bson.M{
+		"account_id": s.AccountID,
+		"deployment": license.DeploymentCloud,
+		"tier":       license.TierFree,
+		"status":     bson.M{"$ne": models.StatusCancelled},
+	})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not check your account"})
+		return
+	}
+	if n > 0 {
+		c.JSON(http.StatusConflict, gin.H{
+			"error": "this account already has a Free cloud instance"})
+		return
+	}
+
+	rec, err := provisionCloudInstance(c, name)
+	if err != nil {
+		cloudProvisionError(c, err)
+		return
+	}
+	inst := rec
+
+	// Past this point nothing fails the request.
+	lic, err := licensing.Issue(ctx, licensing.IssueInput{
+		InstanceID: inst.InstanceID,
+		Tier:       license.TierFree,
+		Term:       "monthly",
+		Reason:     models.ReasonNew,
+		IssuedBy:   "self-serve",
+	})
+	if err != nil {
+		log.Printf("ISSUE FAILED for new instance %s: %v", inst.InstanceID, err)
+		c.JSON(http.StatusCreated, rec)
+		return
+	}
+	inject.Deliver(ctx, lic)
+
+	if mail.Enabled() {
+		if err := mail.Default.SendInstanceReady(s.Email, inst.Name,
+			loginURLFor(inst.Slug), lic.ExpiresAt); err != nil {
+			log.Printf("createInstance: instance-ready email to %s: %v", s.Email, err)
+		}
+	}
+
+	rec.Tier = lic.Tier
+	rec.CurrentLicense = lic.LicenseID
+	c.JSON(http.StatusCreated, rec)
+}
+
+// renewInstance extends a Free licence by another term.
+//
+// Renewal is manual on purpose: it is the entire reclaim signal. An instance
+// nobody renews is an instance nobody is using, and that is what makes the
+// reaper safe to run at all.
+func renewInstance(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	if inst.Tier != license.TierFree {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": "only Free instances renew here; paid plans renew through billing"})
+		return
+	}
+
+	ctx := c.Request.Context()
+
+	var current models.License
+	if err := db.Admin("licenses").FindOne(ctx,
+		bson.M{"license_id": inst.CurrentLicense}).Decode(&current); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no licence issued yet"})
+		return
+	}
+	if time.Now().UTC().Before(current.ExpiresAt.Add(-models.RenewWindow)) {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": fmt.Sprintf("this licence is not due yet; you can renew from %s",
+				current.ExpiresAt.Add(-models.RenewWindow).Format("2 January 2006"))})
+		return
+	}
+
+	// Free renews on its deployment's only term: monthly for cloud, annual for
+	// self-hosted. Reading it from TermsFor rather than hardcoding is what stops
+	// a self-hosted instance being handed a one-month licence.
+	terms := license.TermsFor(inst.Deployment)
+	term := terms[len(terms)-1]
+
+	lic, err := licensing.Issue(ctx, licensing.IssueInput{
+		InstanceID: inst.InstanceID,
+		Tier:       license.TierFree,
+		Term:       term,
+		Reason:     models.ReasonRenewal,
+		IssuedBy:   "self-serve",
+	})
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	// Cloud is injected; self-hosted is delivered to the customer, because their
+	// database is theirs and we cannot write to it.
+	deliver(c, inst, lic)
+
+	// Clear the notice log so the next term starts the sequence again. Issue has
+	// already set status back to active.
+	if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": inst.InstanceID},
+		bson.M{"$unset": bson.M{"notices_sent": ""}}); err != nil {
+		log.Printf("renewInstance: clear notices for %s: %v", inst.InstanceID, err)
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.renewed", AccountID: s.AccountID,
+		Target: inst.InstanceID, IP: c.ClientIP()})
+
+	if mail.Enabled() {
+		if err := mail.Default.SendRenewed(s.Email, inst.Name, lic.ExpiresAt); err != nil {
+			log.Printf("renewInstance: renewed email to %s: %v", s.Email, err)
+		}
+	}
+
+	c.JSON(http.StatusOK, lic)
+}
+
+// loginURLFor fills the {slug} template in APP_LOGIN_URL. An empty template
+// yields an empty string, and the email simply omits the link.
+func loginURLFor(slug string) string {
+	if appLoginURL == "" {
+		return ""
+	}
+	return strings.ReplaceAll(appLoginURL, "{slug}", url.PathEscape(slug))
+}
+
+// appLoginURL is set once at boot from config.
+var appLoginURL string
+
+// SetAppLoginURL is called from main.
+func SetAppLoginURL(v string) { appLoginURL = v }
+
+// claimFree issues a Free licence on a linked self-hosted instance.
+//
+// The link step creates the row; this gives it a licence. They are separate
+// because linking is about identity — proving which install is yours — and
+// claiming is about entitlement, and a customer who links an install and then
+// changes their mind should not have consumed their one Free allowance.
+//
+// Free is outside Paddle entirely, so there is no checkout, no subscription and
+// nothing to reconcile. licensing.Issue's own checkFreeLimit is the real guard;
+// the count here exists to refuse politely before anything is written.
+func claimFree(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	ctx := c.Request.Context()
+
+	// Cloud Free is claimed at creation by POST /api/instances. Allowing it here
+	// too would be a second way to reach the same state, with its own bugs.
+	if inst.Deployment != license.DeploymentSelfHosted {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": "cloud instances get their Free licence when they are created"})
+		return
+	}
+	if inst.CurrentLicense != "" {
+		c.JSON(http.StatusConflict, gin.H{
+			"error": "this instance already has a licence"})
+		return
+	}
+
+	plan, err := models.GetPlan(ctx, license.DeploymentSelfHosted, license.TierFree)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "no Free plan configured"})
+		return
+	}
+	if !plan.Active {
+		c.JSON(http.StatusForbidden, gin.H{
+			"error": "Free self-hosted is not currently offered"})
+		return
+	}
+
+	// The entitlement is written BEFORE the licence, so Issue snapshots it rather
+	// than falling back to the plan base. They are the same numbers today, but
+	// the ordering is what makes that a coincidence rather than a dependency.
+	if err := models.UpsertEntitlement(ctx, models.Entitlement{
+		InstanceID:     inst.InstanceID,
+		AccountID:      inst.AccountID,
+		Deployment:     license.DeploymentSelfHosted,
+		Tier:           license.TierFree,
+		Term:           "annual",
+		Desired:        models.Config{Servers: plan.BaseLimits.MaxServers, Features: models.Features{}},
+		Granted:        models.Config{Servers: plan.BaseLimits.MaxServers, Features: models.Features{}},
+		ResolvedLimits: plan.BaseLimits,
+	}); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	s := auth.Current(c)
+	lic, err := licensing.Issue(ctx, licensing.IssueInput{
+		InstanceID: inst.InstanceID,
+		Tier:       license.TierFree,
+		// Annual, and not a choice. Self-hosted sells annual only because the
+		// term length is the revocation window for an offline licence.
+		Term:     "annual",
+		Reason:   models.ReasonNew,
+		IssuedBy: s.Email,
+	})
+	if err != nil {
+		status := http.StatusBadRequest
+		if errors.Is(err, licensing.ErrFreeLimit) {
+			status = http.StatusConflict
+		}
+		c.JSON(status, gin.H{"error": err.Error()})
+		return
+	}
+
+	deliver(c, inst, lic)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.claimed_free", AccountID: s.AccountID,
+		Target: inst.InstanceID, Detail: "self-hosted Free, annual", IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, lic)
+}
+
+// deliver sends a freshly issued licence where it needs to go. Cloud instances
+// are injected; self-hosted customers are emailed and can download.
+//
+// Delivery failures are logged, never returned: the licence is already recorded,
+// which is the part that must not be lost.
+func deliver(c *gin.Context, inst *models.Instance, lic *models.License) {
+	if inst.Deployment == license.DeploymentCloud {
+		inject.Deliver(c.Request.Context(), lic)
+		return
+	}
+	s := auth.Current(c)
+	if s != nil && mail.Enabled() {
+		_ = mail.Default.SendLicense(s.Email, inst.Name, lic.Blob)
+	}
+}

admin/internal/api/entitlement.go

@@ -0,0 +1,187 @@
+package api
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// entitlementBody is what a caller may set.
+//
+// Only Desired is writable. Granted is what a payment confirmed, and letting a
+// form set it would let the portal grant itself a licence — which is the one
+// thing this whole split exists to prevent. Staff promote Granted explicitly
+// through a separate flag, because staff issuing a licence to somebody who has
+// not paid is a real operation with a real reason, and it should be one they
+// took on purpose and left an audit row for.
+type entitlementBody struct {
+	Tier     string   `json:"tier"`
+	Term     string   `json:"term"`
+	Servers  int      `json:"servers"`
+	Features []string `json:"features"`
+	// Grant promotes Desired into Granted in the same write. Staff only.
+	Grant bool `json:"grant"`
+}
+
+// getEntitlement serves the customer's own view of one instance's configuration.
+func getEntitlement(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	ent, err := models.GetEntitlement(c.Request.Context(), inst.InstanceID)
+	if errors.Is(err, models.ErrNoEntitlement) {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no entitlement"})
+		return
+	}
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"entitlement": ent, "pending": ent.Pending()})
+}
+
+func staffGetEntitlement(c *gin.Context) {
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(c.Request.Context(),
+		bson.M{"instance_id": c.Param("id")}).Decode(&inst); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such instance"})
+		return
+	}
+	ent, err := models.GetEntitlement(c.Request.Context(), inst.InstanceID)
+	if errors.Is(err, models.ErrNoEntitlement) {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no entitlement"})
+		return
+	}
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"entitlement": ent, "pending": ent.Pending()})
+}
+
+// staffSetEntitlement writes an instance's configuration.
+//
+// This is the endpoint that makes metering usable before Paddle exists: staff
+// configure, then issue. It does NOT issue — recording what an instance is
+// allowed and signing a licence for it stay separate, so a bad configuration is
+// a row to correct rather than a licence to supersede.
+func staffSetEntitlement(c *gin.Context) {
+	ctx := c.Request.Context()
+	var body entitlementBody
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid entitlement"})
+		return
+	}
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": c.Param("id")}).Decode(&inst); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such instance"})
+		return
+	}
+
+	tier := body.Tier
+	if tier == "" {
+		tier = inst.Tier
+	}
+	plan, err := models.GetPlan(ctx, inst.Deployment, tier)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": fmt.Sprintf("no plan for %s/%s", inst.Deployment, tier)})
+		return
+	}
+	if !termSold(inst.Deployment, body.Term) {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": fmt.Sprintf("%s does not sell %s", inst.Deployment, body.Term)})
+		return
+	}
+	if body.Servers < plan.BaseLimits.MaxServers &&
+		plan.BaseLimits.MaxServers != -1 {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": fmt.Sprintf("%s includes %d servers; cannot configure fewer",
+				plan.Name, plan.BaseLimits.MaxServers)})
+		return
+	}
+
+	desired := models.Config{
+		Servers:  body.Servers,
+		Features: models.Features(body.Features).OrEmpty(),
+	}
+
+	// Start from whatever is already granted, so writing a desired change never
+	// silently alters what the instance is currently allowed.
+	granted := desired
+	existing, err := models.GetEntitlement(ctx, inst.InstanceID)
+	switch {
+	case err == nil:
+		if !body.Grant {
+			granted = existing.Granted
+		}
+	case errors.Is(err, models.ErrNoEntitlement):
+		// First write. There is nothing granted to preserve, so desired becomes
+		// granted — an instance with an entitlement nobody has granted would
+		// fall back to the plan base at issue time and confuse everyone.
+	default:
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	// Only the limits are stored. Features are NOT snapshotted onto the
+	// entitlement: they live in Granted.Features, and Issue resolves them again
+	// against the catalogue at signing time. Storing a second copy here would
+	// give two answers to "which features does this instance have".
+	limits, _, err := catalogue.Resolve(ctx, plan, granted)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	ent := models.Entitlement{
+		InstanceID:     inst.InstanceID,
+		AccountID:      inst.AccountID,
+		Deployment:     inst.Deployment,
+		Tier:           tier,
+		Term:           body.Term,
+		Desired:        desired,
+		Granted:        granted,
+		ResolvedLimits: limits,
+	}
+	// A reduction is a fact about the future, so it carries a date. There is no
+	// billing period to read yet — plan 5 sets this from the subscription — so
+	// staff-set reductions are marked as pending without one.
+	if desired.Servers < granted.Servers {
+		now := time.Now().UTC()
+		ent.ScheduledChangeAt = &now
+	}
+	if existing != nil {
+		ent.GrantedAt = existing.GrantedAt
+	}
+	if body.Grant {
+		ent.GrantedAt = time.Now().UTC()
+	}
+
+	if err := models.UpsertEntitlement(ctx, ent); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor:     auth.Current(c).Email,
+		Action:    "entitlement.updated",
+		AccountID: inst.AccountID,
+		Target:    inst.InstanceID,
+		Detail: fmt.Sprintf("tier=%s term=%s desired_servers=%d granted_servers=%d granted=%t",
+			tier, body.Term, desired.Servers, granted.Servers, body.Grant),
+	})
+	c.JSON(http.StatusOK, gin.H{"entitlement": ent, "pending": ent.Pending()})
+}

admin/internal/api/members.go

@@ -0,0 +1,237 @@
+package api
+
+import (
+	"errors"
+	"log"
+	"net/http"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/cloudprov"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/provision"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// selfHostedRefusal is the one message every membership endpoint gives for a
+// self-hosted instance. Their users live in their own deployment, which we
+// cannot see and must not write to.
+const selfHostedRefusal = "this install manages its own users; add them in Settings → Instance inside your Vantage install"
+
+func listInstanceMembers(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	ctx := c.Request.Context()
+	cur, err := db.Admin("instance_members").Find(ctx,
+		bson.M{"instance_id": inst.InstanceID})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	members := []models.InstanceMember{}
+	if err := cur.All(ctx, &members); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, members)
+}
+
+// grantInstanceMember projects an account person into a cloud instance.
+func grantInstanceMember(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	if inst.Deployment != license.DeploymentCloud {
+		c.JSON(http.StatusBadRequest, gin.H{"error": selfHostedRefusal})
+		return
+	}
+
+	var body struct {
+		UserID string `json:"user_id"`
+		Role   string `json:"role"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.UserID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "user_id is required"})
+		return
+	}
+	if body.Role == "" {
+		body.Role = sharedmodels.RoleMember
+	}
+	if !sharedmodels.ValidRole(body.Role) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "role must be one of owner, admin, or member"})
+		return
+	}
+
+	target, ok := accountUser(c, body.UserID)
+	if !ok {
+		return
+	}
+	if target.VerifiedAt == nil || target.PasswordHash == "" {
+		// The projection copies a hash. An unverified invitee has no hash, so
+		// the row would exist and be unusable — and an address nobody has
+		// proven they control would hold a login inside a real instance.
+		c.JSON(http.StatusConflict, gin.H{
+			"error": "they have not accepted their invitation yet"})
+		return
+	}
+
+	ctx := c.Request.Context()
+	s := auth.Current(c)
+
+	u, err := cloudprov.GrantUser(ctx, inst.InstanceID, target.Email,
+		target.PasswordHash, body.Role, target.UserID)
+	if err != nil {
+		if errors.Is(err, provision.ErrEmailTaken) {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "that address already has a user inside this instance"})
+			return
+		}
+		log.Printf("grant %s to %s: %v", target.Email, inst.InstanceID, err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not grant access"})
+		return
+	}
+
+	m := models.InstanceMember{
+		MemberID:       uuid.NewString(),
+		AccountID:      inst.AccountID,
+		InstanceID:     inst.InstanceID,
+		CustomerUserID: target.UserID,
+		ControlUserID:  u.UserID,
+		Role:           body.Role,
+		Email:          target.Email,
+		CreatedAt:      time.Now().UTC(),
+	}
+	if _, err := db.Admin("instance_members").InsertOne(ctx, m); err != nil {
+		// Unwind the projection: a control-plane login nobody on this side
+		// records is a login nobody can revoke through the portal.
+		if rErr := cloudprov.RevokeUser(ctx, inst.InstanceID, target.UserID); rErr != nil {
+			log.Printf("grant: FAILED to unwind projection of %s in %s: %v",
+				target.Email, inst.InstanceID, rErr)
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not grant access"})
+		return
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance_member.granted", AccountID: s.AccountID,
+		Target: inst.InstanceID, Detail: target.Email + " role=" + body.Role, IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, m)
+}
+
+// memberRow loads one membership on an instance the caller owns.
+func memberRow(c *gin.Context, instanceID, customerUserID string) (*models.InstanceMember, bool) {
+	var m models.InstanceMember
+	if err := db.Admin("instance_members").FindOne(c.Request.Context(), bson.M{
+		"instance_id":      instanceID,
+		"customer_user_id": customerUserID,
+	}).Decode(&m); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return nil, false
+	}
+	return &m, true
+}
+
+func updateInstanceMemberRole(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	if inst.Deployment != license.DeploymentCloud {
+		c.JSON(http.StatusBadRequest, gin.H{"error": selfHostedRefusal})
+		return
+	}
+	var body struct {
+		Role string `json:"role"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || !sharedmodels.ValidRole(body.Role) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "role must be one of owner, admin, or member"})
+		return
+	}
+	m, ok := memberRow(c, inst.InstanceID, c.Param("uid"))
+	if !ok {
+		return
+	}
+
+	ctx := c.Request.Context()
+	if m.Role == sharedmodels.RoleOwner && body.Role != sharedmodels.RoleOwner {
+		others, err := cloudprov.CountOtherOwners(ctx, inst.InstanceID, m.CustomerUserID)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		if others == 0 {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "this is the instance's last owner; make someone else an owner first"})
+			return
+		}
+	}
+
+	if err := cloudprov.SetMemberRole(ctx, inst.InstanceID, m.CustomerUserID, body.Role); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not change their role"})
+		return
+	}
+	if _, err := db.Admin("instance_members").UpdateOne(ctx,
+		bson.M{"member_id": m.MemberID},
+		bson.M{"$set": bson.M{"role": body.Role}}); err != nil {
+		log.Printf("member role: control plane updated but member row %s did not: %v", m.MemberID, err)
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance_member.role_changed", AccountID: s.AccountID,
+		Target: inst.InstanceID, Detail: m.Email + " role=" + body.Role, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
+func revokeInstanceMember(c *gin.Context) {
+	inst, ok := ownedInstance(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	if inst.Deployment != license.DeploymentCloud {
+		c.JSON(http.StatusBadRequest, gin.H{"error": selfHostedRefusal})
+		return
+	}
+	m, ok := memberRow(c, inst.InstanceID, c.Param("uid"))
+	if !ok {
+		return
+	}
+
+	ctx := c.Request.Context()
+	if m.Role == sharedmodels.RoleOwner {
+		others, err := cloudprov.CountOtherOwners(ctx, inst.InstanceID, m.CustomerUserID)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		if others == 0 {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "this is the instance's last owner; make someone else an owner first"})
+			return
+		}
+	}
+
+	if err := cloudprov.RevokeUser(ctx, inst.InstanceID, m.CustomerUserID); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not revoke access"})
+		return
+	}
+	if _, err := db.Admin("instance_members").DeleteOne(ctx,
+		bson.M{"member_id": m.MemberID}); err != nil {
+		log.Printf("revoke: control-plane user deleted but member row %s remains: %v", m.MemberID, err)
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance_member.revoked", AccountID: s.AccountID,
+		Target: inst.InstanceID, Detail: m.Email, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"revoked": true})
+}

admin/internal/api/paddle.go

@@ -0,0 +1,64 @@
+package api
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"net/http"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/billing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/config"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"github.com/gin-gonic/gin"
+)
+
+// paddleWebhook is the ingress for every Paddle event.
+//
+// Order is load-bearing: read the RAW body first (the signature is over the
+// exact bytes), verify, THEN claim the event ID, THEN dispatch. A bad signature
+// is 401 and processes nothing; a duplicate of a handled event is 200 and does
+// nothing; a handler error is 500 so Paddle retries, and is recorded for staff.
+func paddleWebhook(cfg config.Config) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		body, err := io.ReadAll(c.Request.Body)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "unreadable body"})
+			return
+		}
+		if !paddle.VerifySignature(cfg.PaddleWebhookSecret,
+			c.GetHeader("Paddle-Signature"), body) {
+			log.Printf("paddle webhook: bad signature from %s", c.ClientIP())
+			c.JSON(http.StatusUnauthorized, gin.H{"error": "bad signature"})
+			return
+		}
+
+		var ev billing.Event
+		if err := json.Unmarshal(body, &ev); err != nil || ev.EventID == "" {
+			c.JSON(http.StatusBadRequest, gin.H{"error": "malformed event"})
+			return
+		}
+
+		ctx := c.Request.Context()
+		claimed, err := models.ClaimEvent(ctx, ev.EventID, ev.EventType)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "claim failed"})
+			return
+		}
+		if !claimed {
+			// Already handled (or in flight). 200 so Paddle stops retrying.
+			c.JSON(http.StatusOK, gin.H{"duplicate": true})
+			return
+		}
+
+		if err := billing.Dispatch(ctx, ev); err != nil {
+			log.Printf("paddle webhook: handler %s failed for %s: %v",
+				ev.EventType, ev.EventID, err)
+			_ = models.MarkEventProcessed(ctx, ev.EventID, err)
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "handler failed"})
+			return
+		}
+		_ = models.MarkEventProcessed(ctx, ev.EventID, nil)
+		c.JSON(http.StatusOK, gin.H{"ok": true})
+	}
+}

admin/internal/api/people.go

@@ -0,0 +1,338 @@
+package api
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/cloudprov"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"golang.org/x/crypto/bcrypt"
+)
+
+// listAccountUsers returns the account's people, newest last.
+//
+// Any signed-in member may read this. Knowing who your colleagues are is not
+// privileged, and hiding it would make the members panel unusable for the
+// people it is meant to inform.
+func listAccountUsers(c *gin.Context) {
+	s := auth.Current(c)
+	ctx := c.Request.Context()
+	cur, err := db.Admin("customer_users").Find(ctx, bson.M{"account_id": s.AccountID})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	users := []models.CustomerUser{}
+	if err := cur.All(ctx, &users); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, users)
+}
+
+// inviteAccountUser adds a person to the account.
+//
+// It never sets a password: see CreateInvitedUser. Only an owner may invite
+// another owner, mirroring the control plane's own rule that an admin cannot
+// mint someone with more power than themselves.
+func inviteAccountUser(c *gin.Context) {
+	var body struct {
+		Email string `json:"email"`
+		Role  string `json:"role"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "email is required"})
+		return
+	}
+	email := strings.ToLower(strings.TrimSpace(body.Email))
+	if email == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "email is required"})
+		return
+	}
+	if body.Role == "" {
+		body.Role = models.AccountRoleMember
+	}
+	if !models.ValidAccountRole(body.Role) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "role must be one of owner, admin, or member"})
+		return
+	}
+	me := auth.CurrentUser(c)
+	if body.Role == models.AccountRoleOwner && me.AccountRole != models.AccountRoleOwner {
+		c.JSON(http.StatusForbidden, gin.H{"error": "only an owner can invite another owner"})
+		return
+	}
+
+	ctx := c.Request.Context()
+	s := auth.Current(c)
+
+	// customer_users.email is globally unique, so an address already in use
+	// anywhere cannot be invited here. Say so plainly: unlike signup there is
+	// nothing to conceal, because the inviter already knows this address.
+	if n, _ := db.Admin("customer_users").CountDocuments(ctx, bson.M{"email": email}); n > 0 {
+		c.JSON(http.StatusConflict, gin.H{
+			"error": "that address already has a Vantage HQ account"})
+		return
+	}
+
+	var acct models.Account
+	if err := db.Admin("accounts").FindOne(ctx,
+		bson.M{"account_id": s.AccountID}).Decode(&acct); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not read your account"})
+		return
+	}
+
+	if err := auth.CreateInvitedUser(ctx, s.AccountID, acct.Name, email, body.Role); err != nil {
+		log.Printf("invite %s to %s: %v", email, s.AccountID, err)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not send the invitation"})
+		return
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "account_user.invited", AccountID: s.AccountID,
+		Target: email, Detail: "role=" + body.Role, IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, gin.H{"invited": true})
+}
+
+// accountUser loads one person and confirms they are on the caller's account.
+func accountUser(c *gin.Context, userID string) (*models.CustomerUser, bool) {
+	s := auth.Current(c)
+	var u models.CustomerUser
+	if err := db.Admin("customer_users").FindOne(c.Request.Context(),
+		bson.M{"user_id": userID, "account_id": s.AccountID}).Decode(&u); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return nil, false
+	}
+	return &u, true
+}
+
+// countOtherAccountOwners counts owners of an account other than one person.
+func countOtherAccountOwners(c *gin.Context, exceptUserID string) (int64, error) {
+	s := auth.Current(c)
+	return db.Admin("customer_users").CountDocuments(c.Request.Context(), bson.M{
+		"account_id":   s.AccountID,
+		"account_role": models.AccountRoleOwner,
+		"user_id":      bson.M{"$ne": exceptUserID},
+	})
+}
+
+func updateAccountUserRole(c *gin.Context) {
+	var body struct {
+		Role string `json:"role"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || !models.ValidAccountRole(body.Role) {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "role must be one of owner, admin, or member"})
+		return
+	}
+	target, ok := accountUser(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	me := auth.CurrentUser(c)
+	if target.UserID == me.UserID {
+		c.JSON(http.StatusForbidden, gin.H{"error": "you cannot change your own role"})
+		return
+	}
+	if (body.Role == models.AccountRoleOwner || target.AccountRole == models.AccountRoleOwner) &&
+		me.AccountRole != models.AccountRoleOwner {
+		c.JSON(http.StatusForbidden, gin.H{"error": "only an owner can change owner roles"})
+		return
+	}
+	if target.AccountRole == models.AccountRoleOwner && body.Role != models.AccountRoleOwner {
+		others, err := countOtherAccountOwners(c, target.UserID)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		if others == 0 {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "this is the account's last owner; promote someone else first"})
+			return
+		}
+	}
+
+	ctx := c.Request.Context()
+	if _, err := db.Admin("customer_users").UpdateOne(ctx,
+		bson.M{"user_id": target.UserID},
+		bson.M{"$set": bson.M{"account_role": body.Role}}); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "account_user.role_changed", AccountID: s.AccountID,
+		Target: target.Email, Detail: "role=" + body.Role, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}
+
+// deleteAccountUser removes a person and every instance they hold.
+//
+// Grants go first, and the whole request is refused if any of them would strand
+// an instance with no owner. Removing the person but leaving their projected
+// rows behind would leave working logins for someone the account has removed —
+// the exact failure this endpoint exists to prevent.
+func deleteAccountUser(c *gin.Context) {
+	target, ok := accountUser(c, c.Param("id"))
+	if !ok {
+		return
+	}
+	me := auth.CurrentUser(c)
+	if target.UserID == me.UserID {
+		c.JSON(http.StatusForbidden, gin.H{"error": "you cannot remove your own account"})
+		return
+	}
+	if target.AccountRole == models.AccountRoleOwner && me.AccountRole != models.AccountRoleOwner {
+		c.JSON(http.StatusForbidden, gin.H{"error": "only an owner can remove another owner"})
+		return
+	}
+	if target.AccountRole == models.AccountRoleOwner {
+		others, err := countOtherAccountOwners(c, target.UserID)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		if others == 0 {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "this is the account's last owner; promote someone else first"})
+			return
+		}
+	}
+
+	ctx := c.Request.Context()
+	s := auth.Current(c)
+
+	cur, err := db.Admin("instance_members").Find(ctx,
+		bson.M{"customer_user_id": target.UserID})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	members := []models.InstanceMember{}
+	if err := cur.All(ctx, &members); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	// Check every instance BEFORE deleting anything, so a refusal leaves the
+	// person exactly as they were rather than half-revoked.
+	for _, m := range members {
+		if m.Role != sharedmodels.RoleOwner {
+			continue
+		}
+		others, err := cloudprov.CountOtherOwners(ctx, m.InstanceID, target.UserID)
+		if err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+			return
+		}
+		if others == 0 {
+			c.JSON(http.StatusConflict, gin.H{
+				"error": "they are the last owner of an instance; give someone else that instance's owner role first"})
+			return
+		}
+	}
+
+	for _, m := range members {
+		if err := cloudprov.RevokeUser(ctx, m.InstanceID, target.UserID); err != nil {
+			log.Printf("deleteAccountUser: revoke %s from %s: %v", target.Email, m.InstanceID, err)
+			c.JSON(http.StatusInternalServerError, gin.H{
+				"error": "could not remove their instance access; nothing was deleted"})
+			return
+		}
+		if _, err := db.Admin("instance_members").DeleteOne(ctx,
+			bson.M{"member_id": m.MemberID}); err != nil {
+			log.Printf("deleteAccountUser: drop member row %s: %v", m.MemberID, err)
+		}
+	}
+
+	if _, err := db.Admin("customer_users").DeleteOne(ctx,
+		bson.M{"user_id": target.UserID}); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "account_user.removed", AccountID: s.AccountID,
+		Target: target.Email, Detail: fmt.Sprintf("revoked %d instance(s)", len(members)),
+		IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"deleted": true})
+}
+
+// changeAccountPassword sets one password and pushes it everywhere.
+//
+// HQ's hash is the single source of truth for every hq-sourced row, and the
+// control plane has no local password-change path for them, so there is no
+// competing writer.
+//
+// Propagation is best-effort ON PURPOSE. Failing the password change because
+// one of three instances was briefly unreachable would leave the customer with
+// the password they were trying to get rid of; hqsync repairs a stale instance
+// within fifteen minutes, which is recoverable.
+func changeAccountPassword(c *gin.Context) {
+	var body struct {
+		CurrentPassword string `json:"current_password"`
+		NewPassword     string `json:"new_password"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "current and new password are required"})
+		return
+	}
+	if len(body.NewPassword) < 12 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "choose a password of at least 12 characters"})
+		return
+	}
+
+	s := auth.Current(c)
+	ctx := c.Request.Context()
+
+	var me models.CustomerUser
+	if err := db.Admin("customer_users").FindOne(ctx,
+		bson.M{"user_id": s.UserID}).Decode(&me); err != nil {
+		c.JSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+		return
+	}
+	if bcrypt.CompareHashAndPassword([]byte(me.PasswordHash), []byte(body.CurrentPassword)) != nil {
+		c.JSON(http.StatusForbidden, gin.H{"error": "that is not your current password"})
+		return
+	}
+
+	hash, err := bcrypt.GenerateFromPassword([]byte(body.NewPassword), auth.BcryptCost)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not set the password"})
+		return
+	}
+	if _, err := db.Admin("customer_users").UpdateOne(ctx,
+		bson.M{"user_id": me.UserID},
+		bson.M{"$set": bson.M{"password_hash": string(hash)}}); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not set the password"})
+		return
+	}
+
+	pending := false
+	if n, err := cloudprov.SetPasswordHash(ctx, me.UserID, string(hash)); err != nil {
+		pending = true
+		now := time.Now().UTC()
+		log.Printf("password: propagation for %s failed, hqsync will repair: %v", me.Email, err)
+		_, _ = db.Admin("customer_users").UpdateOne(ctx,
+			bson.M{"user_id": me.UserID},
+			bson.M{"$set": bson.M{"hq_sync_failed_at": now}})
+	} else {
+		log.Printf("password: %s propagated to %d instance user(s)", me.Email, n)
+		_, _ = db.Admin("customer_users").UpdateOne(ctx,
+			bson.M{"user_id": me.UserID},
+			bson.M{"$unset": bson.M{"hq_sync_failed_at": ""}})
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: me.Email, Action: "account_user.password_changed", AccountID: s.AccountID,
+		Target: me.Email, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"updated": true, "propagation_pending": pending})
+}

admin/internal/api/routes.go

@@ -0,0 +1,156 @@
+// Package api mounts admin's HTTP surface.
+//
+// The route table is the single place scoping is guaranteed. Customer routes
+// live behind RequireCustomer and every handler that names an instance calls
+// ownedInstance. A new customer route that skips that helper is a scoping bug,
+// so keep them together and review them together.
+package api
+
+import (
+	"net/http"
+	"slices"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/config"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"github.com/gin-gonic/gin"
+)
+
+func Routes(cfg config.Config) http.Handler {
+	r := gin.New()
+	r.Use(gin.Logger(), gin.Recovery())
+	r.Use(cors(cfg.AllowedOrigins))
+
+	if cfg.TrustProxy {
+		_ = r.SetTrustedProxies(nil)
+	}
+
+	r.GET("/healthz", func(c *gin.Context) { c.JSON(http.StatusOK, gin.H{"ok": true}) })
+
+	r.POST("/auth/staff/login", auth.HandleStaffLogin)
+	// Every customer authenticates against admin's own customer_users. There is
+	// deliberately no path that looks a customer up in the control plane by
+	// email alone: HQ sign-in names no instance, so such a lookup could not be
+	// scoped, and users.email is no longer globally unique.
+	r.POST("/auth/login", auth.HandleCustomerLogin)
+	r.POST("/auth/logout", auth.HandleLogout)
+	r.GET("/auth/verify", auth.HandleVerify)
+	r.GET("/auth/me", getMe)
+	r.POST("/auth/signup", auth.HandleSignup)
+	r.POST("/auth/accept-invite", auth.HandleAcceptInvite)
+
+	// Public: Paddle carries no session cookie; its signature is its auth. Must
+	// NOT sit under the cust group's session middleware.
+	r.POST("/api/paddle/webhook", paddleWebhook(cfg))
+
+	cust := r.Group("/api")
+	cust.Use(auth.RequireCustomer())
+	{
+		cust.GET("/account", getAccount)
+
+		// People. Reading is open to any member; changing anything is
+		// owner-or-admin, enforced per route rather than by splitting the group,
+		// so the guard is visible next to the route it guards.
+		cust.GET("/account/users", listAccountUsers)
+		cust.POST("/account/users",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			inviteAccountUser)
+		cust.PUT("/account/users/:id/role",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			updateAccountUserRole)
+		cust.DELETE("/account/users/:id",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			deleteAccountUser)
+
+		// Any member may change their own password — it is theirs. There is no
+		// endpoint for changing anyone else's.
+		cust.PUT("/account/password", changeAccountPassword)
+
+		cust.POST("/instances",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			createInstance)
+		cust.POST("/instances/link", linkInstance)
+		cust.POST("/instances/:id/relink", relinkInstance)
+		cust.POST("/instances/:id/renew", renewInstance)
+		cust.POST("/instances/:id/claim-free",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			claimFree)
+		cust.GET("/instances/:id/entitlement", getEntitlement)
+		cust.GET("/checkout/options", checkoutOptions)
+		cust.POST("/instances/self-hosted",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			createSelfHostedPlaceholder)
+		// Paid cloud: provisions a real instance the paid webhook then licenses.
+		cust.POST("/instances/cloud",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			createCloudCheckout)
+		cust.PUT("/instances/:id/entitlement",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			updateEntitlement)
+		cust.POST("/billing/portal", billingPortal)
+		cust.POST("/instances/:id/claim-link",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			claimPlaceholderLink)
+		cust.GET("/instances/:id/license", getInstanceLicense)
+		cust.GET("/instances/:id/license/download", downloadInstanceLicense)
+		cust.GET("/instances/:id/members", listInstanceMembers)
+		cust.POST("/instances/:id/members",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			grantInstanceMember)
+		cust.PUT("/instances/:id/members/:uid/role",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			updateInstanceMemberRole)
+		cust.DELETE("/instances/:id/members/:uid",
+			auth.RequireAccountRole(models.AccountRoleOwner, models.AccountRoleAdmin),
+			revokeInstanceMember)
+		cust.GET("/subscriptions", listSubscriptions)
+	}
+
+	staff := r.Group("/api/staff")
+	staff.Use(auth.RequireStaff())
+	{
+		staff.GET("/accounts", staffListAccounts)
+		staff.POST("/accounts", staffCreateAccount)
+		staff.GET("/accounts/:id", staffGetAccount)
+		staff.POST("/accounts/:id/users", staffCreateAccountUser)
+		staff.GET("/instances", staffListInstances)
+		staff.POST("/instances", staffCreateInstance)
+		staff.GET("/instances/:id", staffGetInstance)
+		staff.GET("/subscriptions", staffListSubscriptions)
+		staff.POST("/instances/:id/issue", staffIssue)
+		staff.POST("/instances/:id/relink", staffRelink)
+		staff.GET("/licenses", staffListLicenses)
+		staff.GET("/plans", staffListPlans)
+		// Plans are keyed on the pair now, so the path is too. A single :tier
+		// segment could name three rows.
+		staff.PUT("/plans/:deployment/:tier", staffUpdatePlan)
+
+		staff.GET("/catalogue", staffListCatalogue)
+		staff.PUT("/catalogue", staffUpdateCatalogue)
+
+		staff.GET("/instances/:id/entitlement", staffGetEntitlement)
+		staff.PUT("/instances/:id/entitlement", staffSetEntitlement)
+		staff.GET("/audit", staffAudit)
+		staff.GET("/health/injection", staffInjectionHealth)
+		staff.GET("/health/billing", staffBillingHealth)
+	}
+
+	return r
+}
+
+func cors(allowed []string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		origin := c.GetHeader("Origin")
+		if origin != "" && slices.Contains(allowed, origin) {
+			c.Header("Access-Control-Allow-Origin", origin)
+			c.Header("Access-Control-Allow-Credentials", "true")
+			c.Header("Access-Control-Allow-Headers", "Content-Type")
+			c.Header("Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,OPTIONS")
+		}
+		if c.Request.Method == http.MethodOptions {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+		c.Next()
+	}
+}

admin/internal/api/staff.go

@@ -0,0 +1,617 @@
+package api
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/auth"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/licensing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+func staffListAccounts(c *gin.Context) {
+	filter := bson.M{}
+	if q := c.Query("q"); q != "" {
+		or := []bson.M{
+			{"name": bson.M{"$regex": q, "$options": "i"}},
+			{"billing_email": bson.M{"$regex": q, "$options": "i"}},
+			{"paddle_customer_id": q},
+		}
+		// A support email often contains an instance UUID and nothing else, so
+		// resolve that to its owning account rather than returning nothing.
+		var inst models.Instance
+		if err := db.Admin("admin_instances").FindOne(c.Request.Context(),
+			bson.M{"instance_id": q}).Decode(&inst); err == nil {
+			or = append(or, bson.M{"account_id": inst.AccountID})
+		}
+		filter["$or"] = or
+	}
+	cur, err := db.Admin("accounts").Find(c.Request.Context(), filter,
+		options.Find().SetLimit(200).SetSort(bson.D{{Key: "created_at", Value: -1}}))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	accounts := []models.Account{}
+	if err := cur.All(c.Request.Context(), &accounts); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, accounts)
+}
+
+func staffCreateAccount(c *gin.Context) {
+	var body struct {
+		Name         string `json:"name"`
+		BillingEmail string `json:"billing_email"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.Name == "" || body.BillingEmail == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "name and billing_email are required"})
+		return
+	}
+	acct := models.Account{
+		AccountID:    uuid.NewString(),
+		Name:         body.Name,
+		BillingEmail: body.BillingEmail,
+		Status:       models.AccountActive,
+		CreatedAt:    time.Now().UTC(),
+	}
+	if _, err := db.Admin("accounts").InsertOne(c.Request.Context(), acct); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusCreated, acct)
+}
+
+func staffGetAccount(c *gin.Context) {
+	ctx := c.Request.Context()
+	var acct models.Account
+	if err := db.Admin("accounts").FindOne(ctx, bson.M{"account_id": c.Param("id")}).Decode(&acct); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+	instances := []models.Instance{}
+	if cur, err := db.Admin("admin_instances").Find(ctx, bson.M{"account_id": acct.AccountID}); err == nil {
+		_ = cur.All(ctx, &instances)
+	}
+	subs := []models.Subscription{}
+	if cur, err := db.Admin("subscriptions").Find(ctx, bson.M{"account_id": acct.AccountID}); err == nil {
+		_ = cur.All(ctx, &subs)
+	}
+	users := []models.CustomerUser{}
+	if cur, err := db.Admin("customer_users").Find(ctx, bson.M{"account_id": acct.AccountID}); err == nil {
+		_ = cur.All(ctx, &users)
+	}
+	entries := []models.AuditEntry{}
+	if cur, err := db.Admin("admin_audit").Find(ctx, bson.M{"account_id": acct.AccountID},
+		options.Find().SetLimit(100).SetSort(bson.D{{Key: "created_at", Value: -1}})); err == nil {
+		_ = cur.All(ctx, &entries)
+	}
+
+	// CustomerUser's password hash and both verify-token fields are json:"-",
+	// so no secret leaves here.
+	c.JSON(http.StatusOK, gin.H{
+		"account":       acct,
+		"instances":     instances,
+		"subscriptions": subs,
+		"users":         users,
+		"audit":         entries,
+	})
+}
+
+func staffListInstances(c *gin.Context) {
+	filter := bson.M{}
+	for param, field := range map[string]string{
+		"account_id": "account_id",
+		"deployment": "deployment",
+		"status":     "status",
+	} {
+		if v := c.Query(param); v != "" {
+			filter[field] = v
+		}
+	}
+	if c.Query("expiring") == "true" {
+		// Instances whose licence expires within 14 days, for renewal chasing.
+		//
+		// Empty rather than nil: a nil slice marshals to `$in: null`, which
+		// Mongo rejects outright, so the quiet week when nothing is expiring is
+		// exactly when this query would have failed.
+		ids := []string{}
+		cur, err := db.Admin("licenses").Find(c.Request.Context(), bson.M{
+			"superseded_by": bson.M{"$exists": false},
+			"expires_at":    bson.M{"$lt": time.Now().UTC().Add(14 * 24 * time.Hour)},
+		})
+		if err == nil {
+			var lics []models.License
+			if cur.All(c.Request.Context(), &lics) == nil {
+				for _, l := range lics {
+					ids = append(ids, l.InstanceID)
+				}
+			}
+		}
+		filter["instance_id"] = bson.M{"$in": ids}
+	}
+
+	cur, err := db.Admin("admin_instances").Find(c.Request.Context(), filter,
+		options.Find().SetLimit(500))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	instances := []models.Instance{}
+	if err := cur.All(c.Request.Context(), &instances); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, instances)
+}
+
+// staffCreateInstance attaches an instance to an account.
+//
+// For cloud, this ADOPTS an instance that already exists in the control plane —
+// the control-plane row is the source of truth for its name and slug, and this
+// refuses if no such instance exists, because an admin row pointing at nothing
+// would issue licences nobody can use.
+//
+// For self-hosted it does the same job as the customer-facing link endpoint, so
+// staff can link on a customer's behalf during support.
+//
+// This is how existing cloud instances get licensed: adopt, then issue.
+func staffCreateInstance(c *gin.Context) {
+	var body struct {
+		InstanceID string `json:"instance_id"`
+		AccountID  string `json:"account_id"`
+		Deployment string `json:"deployment"`
+		Name       string `json:"name"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.InstanceID == "" || body.AccountID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "instance_id and account_id are required"})
+		return
+	}
+	ctx := c.Request.Context()
+
+	if n, err := db.Admin("accounts").CountDocuments(ctx, bson.M{"account_id": body.AccountID}); err != nil || n == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such account"})
+		return
+	}
+
+	inst := models.Instance{
+		InstanceID: body.InstanceID,
+		AccountID:  body.AccountID,
+		Name:       body.Name,
+		Deployment: body.Deployment,
+		Status:     models.StatusActive,
+		CreatedAt:  time.Now().UTC(),
+	}
+
+	if body.Deployment == license.DeploymentCloud {
+		var remote sharedmodels.Instance
+		if err := db.Control("instances").FindOne(ctx,
+			bson.M{"instance_id": body.InstanceID}).Decode(&remote); err != nil {
+			c.JSON(http.StatusNotFound, gin.H{"error": "no such cloud instance in the control plane"})
+			return
+		}
+		inst.Name = remote.Name
+		inst.Slug = remote.Slug
+	}
+
+	if _, err := db.Admin("admin_instances").InsertOne(ctx, inst); err != nil {
+		if mongo.IsDuplicateKeyError(err) {
+			c.JSON(http.StatusConflict, gin.H{"error": "that instance is already attached to an account"})
+			return
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "instance.attached", AccountID: body.AccountID, Target: body.InstanceID})
+	c.JSON(http.StatusCreated, inst)
+}
+
+// staffGetInstance is the "why did this stop working" screen's data: one
+// instance, its account, its whole licence history newest first, and whether
+// the control plane currently holds what we think it holds.
+func staffGetInstance(c *gin.Context) {
+	ctx := c.Request.Context()
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": c.Param("id")}).Decode(&inst); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	var acct models.Account
+	_ = db.Admin("accounts").FindOne(ctx, bson.M{"account_id": inst.AccountID}).Decode(&acct)
+
+	lics := []models.License{}
+	if cur, err := db.Admin("licenses").Find(ctx, bson.M{"instance_id": inst.InstanceID},
+		options.Find().SetSort(bson.D{{Key: "issued_at", Value: -1}})); err == nil {
+		_ = cur.All(ctx, &lics)
+	}
+
+	// Injection state is only meaningful for cloud. For self-hosted the
+	// customer holds the blob and there is nothing for us to have written.
+	injection := gin.H{"applicable": inst.Deployment == license.DeploymentCloud}
+	if inst.Deployment == license.DeploymentCloud {
+		var remote sharedmodels.Instance
+		err := db.Control("instances").FindOne(ctx,
+			bson.M{"instance_id": inst.InstanceID}).Decode(&remote)
+		switch {
+		case err != nil:
+			injection["state"] = "missing"
+		case inst.CurrentLicense == "":
+			injection["state"] = "none_issued"
+		default:
+			var current models.License
+			if db.Admin("licenses").FindOne(ctx,
+				bson.M{"license_id": inst.CurrentLicense}).Decode(&current) == nil &&
+				remote.LicenseBlob == current.Blob {
+				injection["state"] = "current"
+			} else {
+				injection["state"] = "stale"
+			}
+		}
+		injection["failed_at"] = inst.InjectFailedAt
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"instance": inst, "account": acct, "licenses": lics, "injection": injection,
+	})
+}
+
+// staffListSubscriptions backs the past-due queue on the dashboard.
+func staffListSubscriptions(c *gin.Context) {
+	filter := bson.M{}
+	if v := c.Query("status"); v != "" {
+		filter["status"] = v
+	}
+	if v := c.Query("account_id"); v != "" {
+		filter["account_id"] = v
+	}
+	cur, err := db.Admin("subscriptions").Find(c.Request.Context(), filter,
+		options.Find().SetLimit(500))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	subs := []models.Subscription{}
+	if err := cur.All(c.Request.Context(), &subs); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, subs)
+}
+
+func staffIssue(c *gin.Context) {
+	var body struct {
+		Tier   string `json:"tier"`
+		Term   string `json:"term"`
+		Reason string `json:"reason"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.Tier == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "tier is required"})
+		return
+	}
+	if body.Reason == "" {
+		body.Reason = models.ReasonManual
+	}
+
+	s := auth.Current(c)
+	lic, err := licensing.Issue(c.Request.Context(), licensing.IssueInput{
+		InstanceID: c.Param("id"),
+		Tier:       body.Tier,
+		Term:       body.Term,
+		Reason:     body.Reason,
+		IssuedBy:   s.Email,
+	})
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	var inst models.Instance
+	if db.Admin("admin_instances").FindOne(c.Request.Context(),
+		bson.M{"instance_id": lic.InstanceID}).Decode(&inst) == nil {
+		deliver(c, &inst, lic)
+	}
+	c.JSON(http.StatusCreated, lic)
+}
+
+// staffRelink has no attempt cap. The customer-facing limit exists to put a
+// human in front of the fourth attempt; this is that human.
+func staffRelink(c *gin.Context) {
+	var body struct {
+		InstanceID string `json:"instance_id"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.InstanceID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "instance_id is required"})
+		return
+	}
+	ctx := c.Request.Context()
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": c.Param("id")}).Decode(&inst); err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "not found"})
+		return
+	}
+
+	lic, err := licensing.Relink(ctx, inst.AccountID, inst.InstanceID, body.InstanceID, true)
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, lic)
+}
+
+func staffListLicenses(c *gin.Context) {
+	filter := bson.M{}
+	if v := c.Query("instance_id"); v != "" {
+		filter["instance_id"] = v
+	}
+	if v := c.Query("account_id"); v != "" {
+		filter["account_id"] = v
+	}
+	cur, err := db.Admin("licenses").Find(c.Request.Context(), filter,
+		options.Find().SetLimit(500).SetSort(bson.D{{Key: "issued_at", Value: -1}}))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	lics := []models.License{}
+	if err := cur.All(c.Request.Context(), &lics); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, lics)
+}
+
+// staffBillingHealth surfaces webhook handlers that failed and paid-but-unlinked
+// placeholders, so a customer who paid and got nothing is visible rather than
+// stuck in a support queue.
+func staffBillingHealth(c *gin.Context) {
+	ctx := c.Request.Context()
+	failed := []models.PaddleEvent{}
+	if cur, err := db.Admin("paddle_events").Find(ctx,
+		bson.M{"processed_at": bson.M{"$exists": false}, "error": bson.M{"$ne": ""}}); err == nil {
+		_ = cur.All(ctx, &failed)
+	}
+	unlinked := []models.Instance{}
+	if cur, err := db.Admin("admin_instances").Find(ctx,
+		bson.M{"placeholder": true, "status": models.StatusAwaitingLink}); err == nil {
+		_ = cur.All(ctx, &unlinked)
+	}
+	c.JSON(http.StatusOK, gin.H{
+		"failed_events":  failed,
+		"failed_count":   len(failed),
+		"unlinked_paid":  unlinked,
+		"unlinked_count": len(unlinked),
+	})
+}
+
+func staffListPlans(c *gin.Context) {
+	cur, err := db.Admin("plans").Find(c.Request.Context(), bson.M{})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	plans := []models.Plan{}
+	if err := cur.All(c.Request.Context(), &plans); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, plans)
+}
+
+// staffUpdatePlan changes what a (deployment, tier) pair grants FROM NOW ON.
+// Existing licences snapshotted their plan at issue time and are unaffected —
+// the same rule as workflow_runs.steps_snapshot.
+//
+// It writes no Paddle identifiers: those live in the catalogue, because a
+// metered plan is priced by several components.
+func staffUpdatePlan(c *gin.Context) {
+	var body models.Plan
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid plan"})
+		return
+	}
+	deployment, tier := c.Param("deployment"), c.Param("tier")
+	set := bson.M{
+		"name":          body.Name,
+		"base_limits":   body.BaseLimits,
+		"base_features": body.BaseFeatures.OrEmpty(),
+		"support_level": body.SupportLevel,
+		"active":        body.Active,
+	}
+	res, err := db.Admin("plans").UpdateOne(c.Request.Context(),
+		bson.M{"deployment": deployment, "tier": tier}, bson.M{"$set": set})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if res.MatchedCount == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such plan"})
+		return
+	}
+	audit.Write(c.Request.Context(), models.AuditEntry{
+		Actor:  auth.Current(c).Email,
+		Action: "plan.updated",
+		Target: deployment + "/" + tier,
+		Detail: fmt.Sprintf("servers=%d monitors=%d support=%s active=%t",
+			body.BaseLimits.MaxServers, body.BaseLimits.MaxMonitors,
+			body.SupportLevel, body.Active),
+	})
+	c.JSON(http.StatusOK, gin.H{"updated": true})
+}
+
+func staffListCatalogue(c *gin.Context) {
+	rows, err := models.AllCatalogue(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, rows)
+}
+
+// staffUpdateCatalogue sets the price IDs on one component.
+//
+// The component is addressed by its natural key rather than by an ObjectID, so
+// the staff UI never has to hold a Mongo identifier and a seeded row can be
+// updated the moment it exists. Only price IDs are writable: a row's kind, plan
+// and key are seeded by SeedCatalogue, and letting a form invent a limit_key
+// would let it invent a limit nothing enforces.
+func staffUpdateCatalogue(c *gin.Context) {
+	var body struct {
+		Kind       string                       `json:"kind"`
+		Deployment string                       `json:"deployment"`
+		Tier       string                       `json:"tier"`
+		LimitKey   string                       `json:"limit_key"`
+		FeatureKey string                       `json:"feature_key"`
+		PriceIDs   map[string]map[string]string `json:"price_ids"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "invalid component"})
+		return
+	}
+
+	// Refuse a price on a term the deployment does not sell. Storing one would
+	// mean a resolved self-hosted monthly price later, which the resolver treats
+	// as a configuration error — better to refuse it at the point somebody
+	// pastes it, while they are looking at the screen.
+	for env, byTerm := range body.PriceIDs {
+		for term, id := range byTerm {
+			if id == "" {
+				continue
+			}
+			if !termSold(body.Deployment, term) {
+				c.JSON(http.StatusBadRequest, gin.H{
+					"error": fmt.Sprintf("%s does not sell %s (environment %s)",
+						body.Deployment, term, env)})
+				return
+			}
+		}
+	}
+
+	filter := bson.M{
+		"kind":        body.Kind,
+		"deployment":  body.Deployment,
+		"tier":        body.Tier,
+		"limit_key":   body.LimitKey,
+		"feature_key": body.FeatureKey,
+	}
+	res, err := db.Admin("catalogue").UpdateOne(c.Request.Context(), filter,
+		bson.M{"$set": bson.M{"price_ids": body.PriceIDs}})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	if res.MatchedCount == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such component"})
+		return
+	}
+	audit.Write(c.Request.Context(), models.AuditEntry{
+		Actor:  auth.Current(c).Email,
+		Action: "catalogue.updated",
+		Target: body.Deployment + "/" + body.Tier + "/" + body.Kind,
+		Detail: body.LimitKey + body.FeatureKey,
+	})
+	c.JSON(http.StatusOK, gin.H{"updated": true})
+}
+
+func termSold(deployment, term string) bool {
+	for _, t := range license.TermsFor(deployment) {
+		if t == term {
+			return true
+		}
+	}
+	return false
+}
+
+func staffAudit(c *gin.Context) {
+	filter := bson.M{}
+	if v := c.Query("account_id"); v != "" {
+		filter["account_id"] = v
+	}
+	cur, err := db.Admin("admin_audit").Find(c.Request.Context(), filter,
+		options.Find().SetLimit(500).SetSort(bson.D{{Key: "created_at", Value: -1}}))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	entries := []models.AuditEntry{}
+	if err := cur.All(c.Request.Context(), &entries); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, entries)
+}
+
+// staffInjectionHealth lists instances whose last injection failed. This is the
+// page to look at when a customer says their cloud instance is read-only.
+func staffInjectionHealth(c *gin.Context) {
+	cur, err := db.Admin("admin_instances").Find(c.Request.Context(),
+		bson.M{"inject_failed_at": bson.M{"$exists": true}})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	failed := []models.Instance{}
+	if err := cur.All(c.Request.Context(), &failed); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"failed": failed, "count": len(failed)})
+}
+
+// staffCreateAccountUser gives an account an HQ login.
+//
+// This is how a legacy cloud customer — one whose instance predates HQ accounts
+// — gets into the portal, alongside the manual instance attach the spec README
+// describes. It reuses CreateCustomerUser, so the row is unverified until the
+// emailed link is opened and is rolled back if that email cannot be sent.
+func staffCreateAccountUser(c *gin.Context) {
+	var body struct {
+		Email    string `json:"email"`
+		Password string `json:"password"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.Email == "" || len(body.Password) < 12 {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error": "email and a password of at least 12 characters are required"})
+		return
+	}
+	ctx := c.Request.Context()
+	accountID := c.Param("id")
+
+	if n, err := db.Admin("accounts").CountDocuments(ctx,
+		bson.M{"account_id": accountID}); err != nil || n == 0 {
+		c.JSON(http.StatusNotFound, gin.H{"error": "no such account"})
+		return
+	}
+
+	email := strings.ToLower(strings.TrimSpace(body.Email))
+	// Staff attaching a legacy customer are attaching the person who runs that
+	// account, so they get owner.
+	if err := auth.CreateCustomerUser(ctx, accountID, email, body.Password, models.AccountRoleOwner); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	s := auth.Current(c)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: s.Email, Action: "customer_user.created", AccountID: accountID, Target: email})
+	c.JSON(http.StatusCreated, gin.H{"pending": true})
+}

admin/internal/audit/audit.go

@@ -0,0 +1,21 @@
+// Package audit records who did what. Every issuance, link, relink and sign-in
+// attempt lands here.
+package audit
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+)
+
+// Write never returns an error: an audit failure must not roll back the action
+// it describes. It logs instead, loudly enough to notice.
+func Write(ctx context.Context, e models.AuditEntry) {
+	e.CreatedAt = time.Now().UTC()
+	if _, err := db.Admin("admin_audit").InsertOne(ctx, e); err != nil {
+		log.Printf("AUDIT WRITE FAILED action=%s target=%s: %v", e.Action, e.Target, err)
+	}
+}

admin/internal/auth/customer.go

@@ -0,0 +1,346 @@
+package auth
+
+import (
+	"context"
+	"crypto/rand"
+	"crypto/sha256"
+	"encoding/hex"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	sharedmail "gitea.hostxtra.co.uk/mrhid6/vantage/shared/mail"
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"golang.org/x/crypto/bcrypt"
+)
+
+// BcryptCost matches the control plane and sitesvc. Changing it here alone would
+// make hashes inconsistent across services that may one day compare them.
+const BcryptCost = 12
+
+// VerifyWindow mirrors sitesvc's proven pattern: 32 random bytes, only the
+// SHA-256 hash stored, 24-hour expiry.
+//
+// It is shared/mail's constant rather than a second copy because the
+// verification email states the number of hours: a window that disagreed with
+// what the email promised would expire links early with no explanation.
+const VerifyWindow = sharedmail.VerifyWindow
+
+// CreateCustomerUser creates an unverified HQ login with a chosen password and
+// emails the verification link. Used by signup and by staff.
+func CreateCustomerUser(ctx context.Context, accountID, email, password, accountRole string) error {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), BcryptCost)
+	if err != nil {
+		return err
+	}
+
+	raw := make([]byte, 32)
+	if _, err := rand.Read(raw); err != nil {
+		return err
+	}
+	token := hex.EncodeToString(raw)
+	sum := sha256.Sum256([]byte(token))
+	expiry := time.Now().UTC().Add(VerifyWindow)
+
+	u := models.CustomerUser{
+		UserID:            uuid.NewString(),
+		AccountID:         accountID,
+		Email:             strings.ToLower(strings.TrimSpace(email)),
+		PasswordHash:      string(hash),
+		AccountRole:       accountRole,
+		VerifyTokenHash:   hex.EncodeToString(sum[:]),
+		VerifyTokenExpiry: &expiry,
+		CreatedAt:         time.Now().UTC(),
+	}
+	if _, err := db.Admin("customer_users").InsertOne(ctx, u); err != nil {
+		return err
+	}
+
+	if err := mail.Default.SendVerification(u.Email, token); err != nil {
+		// Undo the insert. A row whose verification link was never delivered is
+		// worse than no row: it can never be signed in to, and it holds the
+		// unique index on email, so the customer cannot sign up again with the
+		// address they just used.
+		//
+		// Deliberately NOT on ctx. ctx is the HTTP request's, and the most likely
+		// reason we are here is that the mail server stalled until the browser
+		// gave up — which cancels ctx and makes this delete a silent no-op,
+		// stranding exactly the row it exists to remove. That happened in
+		// production against a port-465 server.
+		rbCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 10*time.Second)
+		defer cancel()
+		if _, dErr := db.Admin("customer_users").DeleteOne(rbCtx, bson.M{"user_id": u.UserID}); dErr != nil {
+			log.Printf("signup: FAILED to roll back customer_user %s (%s) after mail error: %v",
+				u.UserID, u.Email, dErr)
+		}
+		return err
+	}
+	return nil
+}
+
+// CreateInvitedUser creates a passwordless, unverified member of an existing
+// account and emails them a link to set a password.
+//
+// The empty hash is load-bearing: bcrypt.CompareHashAndPassword against "" can
+// never succeed, so the row cannot sign in and cannot usefully be projected
+// into an instance until the invitee has been through /accept-invite. That is
+// also why a grant refuses an unverified user.
+func CreateInvitedUser(ctx context.Context, accountID, accountName, email, accountRole string) error {
+	raw := make([]byte, 32)
+	if _, err := rand.Read(raw); err != nil {
+		return err
+	}
+	token := hex.EncodeToString(raw)
+	sum := sha256.Sum256([]byte(token))
+	expiry := time.Now().UTC().Add(VerifyWindow)
+
+	u := models.CustomerUser{
+		UserID:            uuid.NewString(),
+		AccountID:         accountID,
+		Email:             strings.ToLower(strings.TrimSpace(email)),
+		AccountRole:       accountRole,
+		VerifyTokenHash:   hex.EncodeToString(sum[:]),
+		VerifyTokenExpiry: &expiry,
+		CreatedAt:         time.Now().UTC(),
+	}
+	if _, err := db.Admin("customer_users").InsertOne(ctx, u); err != nil {
+		return err
+	}
+
+	if err := mail.Default.SendInvite(u.Email, accountName, token); err != nil {
+		// Same rollback rule, and the same detached context, as signup: a row
+		// whose link was never delivered can never be signed in to and holds
+		// the unique index on email against the person it was meant for.
+		rbCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 10*time.Second)
+		defer cancel()
+		if _, dErr := db.Admin("customer_users").DeleteOne(rbCtx, bson.M{"user_id": u.UserID}); dErr != nil {
+			log.Printf("invite: FAILED to roll back customer_user %s (%s) after mail error: %v",
+				u.UserID, u.Email, dErr)
+		}
+		return err
+	}
+	return nil
+}
+
+// HandleAcceptInvite consumes an invitation token and sets the password.
+//
+// Verification and password-setting are one step for an invitee, because the
+// link IS the proof of address and there is nothing to verify separately.
+func HandleAcceptInvite(c *gin.Context) {
+	var body struct {
+		Token    string `json:"token"`
+		Password string `json:"password"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil || body.Token == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "missing token"})
+		return
+	}
+	if len(body.Password) < 12 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "choose a password of at least 12 characters"})
+		return
+	}
+	hash, err := bcrypt.GenerateFromPassword([]byte(body.Password), BcryptCost)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not set the password"})
+		return
+	}
+
+	sum := sha256.Sum256([]byte(body.Token))
+	now := time.Now().UTC()
+	res, err := db.Admin("customer_users").UpdateOne(c.Request.Context(),
+		bson.M{
+			"verify_token_hash":   hex.EncodeToString(sum[:]),
+			"verify_token_expiry": bson.M{"$gt": now},
+		},
+		bson.M{
+			"$set":   bson.M{"verified_at": now, "password_hash": string(hash)},
+			"$unset": bson.M{"verify_token_hash": "", "verify_token_expiry": ""},
+		})
+	if err != nil || res.MatchedCount == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "that link is invalid or has expired"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"accepted": true})
+}
+
+// HandleSignup creates a self-hosted customer: an account, an unverified user,
+// and a verification email.
+//
+// Nothing is usable until the emailed link is opened, the same rule sitesvc
+// already proves — so an address nobody controls cannot occupy an email or
+// produce an account that can sign in.
+func HandleSignup(c *gin.Context) {
+	var body struct {
+		Name     string `json:"name"`
+		Email    string `json:"email"`
+		Password string `json:"password"`
+		Website  string `json:"website"` // honeypot; real users never fill it
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "name, email and password are required"})
+		return
+	}
+
+	// Honeypot: answer exactly as success so a bot learns nothing.
+	if strings.TrimSpace(body.Website) != "" {
+		c.JSON(http.StatusCreated, gin.H{"pending": true})
+		return
+	}
+
+	email := strings.ToLower(strings.TrimSpace(body.Email))
+	ctx := c.Request.Context()
+
+	if email == "" || len(body.Password) < 12 || strings.TrimSpace(body.Name) == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "name, email and a password of at least 12 characters are required"})
+		return
+	}
+	if !allowAttempt("signup:"+email, c.ClientIP()) {
+		c.JSON(http.StatusTooManyRequests, gin.H{"error": "too many attempts, try again later"})
+		return
+	}
+
+	if n, _ := db.Admin("customer_users").CountDocuments(ctx, bson.M{"email": email}); n > 0 {
+		// Same response as success. Telling a stranger the address is taken
+		// confirms who has an account here.
+		c.JSON(http.StatusCreated, gin.H{"pending": true})
+		return
+	}
+
+	acct := models.Account{
+		AccountID:    uuid.NewString(),
+		Name:         strings.TrimSpace(body.Name),
+		BillingEmail: email,
+		Status:       models.AccountActive,
+		CreatedAt:    time.Now().UTC(),
+	}
+	if _, err := db.Admin("accounts").InsertOne(ctx, acct); err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not create the account"})
+		return
+	}
+
+	if err := CreateCustomerUser(ctx, acct.AccountID, email, body.Password, models.AccountRoleOwner); err != nil {
+		// Roll the account back rather than strand one with no owner. Detached
+		// from ctx for the same reason as the user rollback above: a stalled mail
+		// server cancels the request, and a rollback that needs the request to
+		// still be alive is a rollback that fails exactly when it is needed.
+		log.Printf("signup: %s failed, rolling back account %s: %v", email, acct.AccountID, err)
+		rbCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 10*time.Second)
+		defer cancel()
+		if _, dErr := db.Admin("accounts").DeleteOne(rbCtx, bson.M{"account_id": acct.AccountID}); dErr != nil {
+			log.Printf("signup: FAILED to roll back account %s: %v", acct.AccountID, dErr)
+		}
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "could not send the verification email"})
+		return
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: email, Action: "customer.signup", AccountID: acct.AccountID, IP: c.ClientIP()})
+	c.JSON(http.StatusCreated, gin.H{"pending": true})
+}
+
+// HandleVerify consumes a verification token.
+func HandleVerify(c *gin.Context) {
+	token := c.Query("token")
+	if token == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "missing token"})
+		return
+	}
+	sum := sha256.Sum256([]byte(token))
+	now := time.Now().UTC()
+	ctx := c.Request.Context()
+	hashed := hex.EncodeToString(sum[:])
+
+	// Peek first. An invited row has no password yet, so consuming its token
+	// here would verify an account nobody can sign in to and burn the only
+	// link that could fix it.
+	var u models.CustomerUser
+	if err := db.Admin("customer_users").FindOne(ctx, bson.M{
+		"verify_token_hash":   hashed,
+		"verify_token_expiry": bson.M{"$gt": now},
+	}).Decode(&u); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "that link is invalid or has expired"})
+		return
+	}
+	if u.PasswordHash == "" {
+		c.JSON(http.StatusOK, gin.H{"verified": false, "needs_password": true})
+		return
+	}
+
+	res, err := db.Admin("customer_users").UpdateOne(ctx,
+		bson.M{
+			"verify_token_hash":   hashed,
+			"verify_token_expiry": bson.M{"$gt": now},
+		},
+		bson.M{
+			"$set":   bson.M{"verified_at": now},
+			"$unset": bson.M{"verify_token_hash": "", "verify_token_expiry": ""},
+		})
+	if err != nil || res.MatchedCount == 0 {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "that link is invalid or has expired"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"verified": true})
+}
+
+// HandleCustomerLogin authenticates a self-hosted customer.
+func HandleCustomerLogin(c *gin.Context) {
+	var body struct {
+		Email    string `json:"email"`
+		Password string `json:"password"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "email and password are required"})
+		return
+	}
+	email := strings.ToLower(strings.TrimSpace(body.Email))
+	ctx := c.Request.Context()
+
+	if !allowAttempt(email, c.ClientIP()) {
+		c.JSON(http.StatusTooManyRequests, gin.H{"error": "too many attempts, try again later"})
+		return
+	}
+
+	reject := func(reason string) {
+		audit.Write(ctx, models.AuditEntry{
+			Actor: email, Action: "customer.login_failed", IP: c.ClientIP(), Detail: reason})
+		c.JSON(http.StatusUnauthorized, gin.H{"error": genericAuthError})
+	}
+
+	var u models.CustomerUser
+	if err := db.Admin("customer_users").FindOne(ctx, bson.M{"email": email}).Decode(&u); err != nil {
+		bcrypt.CompareHashAndPassword([]byte(dummyHash), []byte(body.Password))
+		reject("unknown email")
+		return
+	}
+	if bcrypt.CompareHashAndPassword([]byte(u.PasswordHash), []byte(body.Password)) != nil {
+		reject("bad password")
+		return
+	}
+	if u.VerifiedAt == nil {
+		// Distinct from genericAuthError on purpose: the address is already
+		// known to be theirs, so there is nothing to disclose, and "check your
+		// email" is the only useful thing to say.
+		c.JSON(http.StatusForbidden, gin.H{"error": "verify your email address first"})
+		return
+	}
+
+	id, err := Save(ctx, Session{
+		UserID: u.UserID, Kind: KindCustomer, Email: u.Email, AccountID: u.AccountID,
+	})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "session failed"})
+		return
+	}
+	SetCookie(c, id)
+	clearAttempts(email)
+	audit.Write(ctx, models.AuditEntry{
+		Actor: email, Action: "customer.login", AccountID: u.AccountID, IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"kind": KindCustomer, "email": u.Email})
+}

admin/internal/auth/middleware.go

@@ -0,0 +1,111 @@
+package auth
+
+import (
+	"net/http"
+	"slices"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+const ctxSession = "admin_session_obj"
+
+// Load returns the caller's session, or nil. Exported because the session probe
+// in api/ needs to read a session without requiring one.
+func Load(c *gin.Context) *Session {
+	id, err := c.Cookie(CookieName)
+	if err != nil || id == "" {
+		return nil
+	}
+	s, err := Get(c.Request.Context(), id)
+	if err != nil {
+		return nil
+	}
+	return s
+}
+
+// Current returns the session, or nil.
+func Current(c *gin.Context) *Session {
+	if v, ok := c.Get(ctxSession); ok {
+		if s, ok := v.(*Session); ok {
+			return s
+		}
+	}
+	return nil
+}
+
+func RequireStaff() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		s := Load(c)
+		if s == nil || s.Kind != KindStaff {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+			return
+		}
+		c.Set(ctxSession, s)
+		c.Next()
+	}
+}
+
+// RequireCustomer admits both cloud and self-hosted customers. Every handler
+// behind it scopes by AccountID via the helper in api/customer.go — never by
+// remembering to filter.
+func RequireCustomer() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		s := Load(c)
+		if s == nil || s.Kind != KindCustomer || s.AccountID == "" {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+			return
+		}
+		c.Set(ctxSession, s)
+		c.Next()
+	}
+}
+
+const ctxCustomerUser = "admin_customer_user"
+
+// CurrentUser returns the calling customer's own row, loaded once per request
+// by RequireAccountRole.
+//
+// It is nil behind RequireCustomer alone. A handler that needs the role must
+// sit behind RequireAccountRole, which is the only thing that loads it.
+func CurrentUser(c *gin.Context) *models.CustomerUser {
+	if v, ok := c.Get(ctxCustomerUser); ok {
+		if u, ok := v.(*models.CustomerUser); ok {
+			return u
+		}
+	}
+	return nil
+}
+
+// RequireAccountRole admits a customer holding one of the given account roles.
+//
+// The role is read from the database on every request rather than carried in
+// the session. A session lives 24 hours; a demotion that only takes effect
+// when someone signs out again is not a demotion.
+func RequireAccountRole(roles ...string) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		s := Current(c)
+		if s == nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+			return
+		}
+		var u models.CustomerUser
+		if err := db.Admin("customer_users").FindOne(c.Request.Context(),
+			bson.M{"user_id": s.UserID}).Decode(&u); err != nil {
+			c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "sign in required"})
+			return
+		}
+		if !slices.Contains(roles, u.AccountRole) {
+			// 403 rather than 404 here: this is the caller's OWN account, so
+			// there is no existence to disclose — the 404 rule protects other
+			// accounts' resources, not the caller's view of their own.
+			c.AbortWithStatusJSON(http.StatusForbidden, gin.H{
+				"error": "your account role does not allow this"})
+			return
+		}
+		c.Set(ctxCustomerUser, &u)
+		c.Next()
+	}
+}

admin/internal/auth/ratelimit.go

@@ -0,0 +1,55 @@
+package auth
+
+import (
+	"sync"
+	"time"
+)
+
+// Thresholds from spec 3: 5 attempts per email per 15 minutes, 20 per IP per
+// hour. The email limit stops a targeted attack on one account; the IP limit
+// stops a spray across many.
+const (
+	emailLimit  = 5
+	emailWindow = 15 * time.Minute
+	ipLimit     = 20
+	ipWindow    = time.Hour
+)
+
+var (
+	attemptMu sync.Mutex
+	byEmail   = map[string][]time.Time{}
+	byIP      = map[string][]time.Time{}
+)
+
+func prune(in []time.Time, cutoff time.Time) []time.Time {
+	out := in[:0]
+	for _, t := range in {
+		if t.After(cutoff) {
+			out = append(out, t)
+		}
+	}
+	return out
+}
+
+func allowAttempt(email, ip string) bool {
+	now := time.Now()
+
+	attemptMu.Lock()
+	defer attemptMu.Unlock()
+
+	byEmail[email] = prune(byEmail[email], now.Add(-emailWindow))
+	byIP[ip] = prune(byIP[ip], now.Add(-ipWindow))
+
+	if len(byEmail[email]) >= emailLimit || len(byIP[ip]) >= ipLimit {
+		return false
+	}
+	byEmail[email] = append(byEmail[email], now)
+	byIP[ip] = append(byIP[ip], now)
+	return true
+}
+
+func clearAttempts(email string) {
+	attemptMu.Lock()
+	delete(byEmail, email)
+	attemptMu.Unlock()
+}

admin/internal/auth/session.go

@@ -0,0 +1,101 @@
+// Package auth holds admin's three identities: staff, cloud customers and
+// self-hosted customers. All three share one session store and one cookie.
+package auth
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
+)
+
+const (
+	CookieName   = "admin_session"
+	SessionTTL   = 24 * time.Hour
+	KindStaff    = "staff"
+	KindCustomer = "customer"
+)
+
+type Session struct {
+	UserID    string `json:"user_id"`
+	Kind      string `json:"kind"`
+	Email     string `json:"email"`
+	AccountID string `json:"account_id,omitempty"` // customers only
+}
+
+var rdb *redis.Client
+
+// InitRedis connects the session store.
+//
+// Username and password may both be empty for an unauthenticated instance. For
+// a legacy `requirepass` Redis, pass the password with an empty username —
+// go-redis then sends AUTH with one argument instead of two.
+func InitRedis(addr, username, password string) {
+	rdb = redis.NewClient(&redis.Options{
+		Addr:     addr,
+		Username: username,
+		Password: password,
+	})
+}
+
+func Ping(ctx context.Context) error { return rdb.Ping(ctx).Err() }
+
+func newID() (string, error) {
+	b := make([]byte, 32)
+	if _, err := rand.Read(b); err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(b), nil
+}
+
+func Save(ctx context.Context, s Session) (string, error) {
+	id, err := newID()
+	if err != nil {
+		return "", err
+	}
+	body, err := json.Marshal(s)
+	if err != nil {
+		return "", err
+	}
+	if err := rdb.Set(ctx, "admin_session:"+id, body, SessionTTL).Err(); err != nil {
+		return "", err
+	}
+	return id, nil
+}
+
+func Get(ctx context.Context, id string) (*Session, error) {
+	body, err := rdb.Get(ctx, "admin_session:"+id).Bytes()
+	if err != nil {
+		return nil, err
+	}
+	var s Session
+	if err := json.Unmarshal(body, &s); err != nil {
+		return nil, err
+	}
+	return &s, nil
+}
+
+func Destroy(ctx context.Context, id string) { rdb.Del(ctx, "admin_session:"+id) }
+
+func SetCookie(c *gin.Context, id string) {
+	http.SetCookie(c.Writer, &http.Cookie{
+		Name:     CookieName,
+		Value:    id,
+		Path:     "/",
+		HttpOnly: true,
+		Secure:   true,
+		SameSite: http.SameSiteLaxMode,
+		MaxAge:   int(SessionTTL.Seconds()),
+	})
+}
+
+func ClearCookie(c *gin.Context) {
+	http.SetCookie(c.Writer, &http.Cookie{
+		Name: CookieName, Value: "", Path: "/", HttpOnly: true, Secure: true, MaxAge: -1,
+	})
+}

admin/internal/auth/staff.go

@@ -0,0 +1,77 @@
+package auth
+
+import (
+	"net/http"
+	"strings"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"github.com/gin-gonic/gin"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"golang.org/x/crypto/bcrypt"
+)
+
+// genericAuthError is returned for every failure mode — unknown email, wrong
+// password, wrong role. Distinguishing them would confirm which addresses have
+// accounts.
+const genericAuthError = "email or password is incorrect"
+
+func HandleStaffLogin(c *gin.Context) {
+	var body struct {
+		Email    string `json:"email"`
+		Password string `json:"password"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "email and password are required"})
+		return
+	}
+	email := strings.ToLower(strings.TrimSpace(body.Email))
+
+	if !allowAttempt(email, c.ClientIP()) {
+		c.JSON(http.StatusTooManyRequests, gin.H{"error": "too many attempts, try again later"})
+		return
+	}
+
+	var u models.StaffUser
+	err := db.Admin("staff_users").FindOne(c.Request.Context(), bson.M{"email": email}).Decode(&u)
+	if err != nil {
+		// Spend the same work as a real comparison so timing does not
+		// distinguish "no such user" from "wrong password".
+		bcrypt.CompareHashAndPassword([]byte(dummyHash), []byte(body.Password))
+		audit.Write(c.Request.Context(), models.AuditEntry{
+			Actor: email, Action: "staff.login_failed", IP: c.ClientIP(), Detail: "unknown email"})
+		c.JSON(http.StatusUnauthorized, gin.H{"error": genericAuthError})
+		return
+	}
+
+	if bcrypt.CompareHashAndPassword([]byte(u.PasswordHash), []byte(body.Password)) != nil {
+		audit.Write(c.Request.Context(), models.AuditEntry{
+			Actor: email, Action: "staff.login_failed", IP: c.ClientIP(), Detail: "bad password"})
+		c.JSON(http.StatusUnauthorized, gin.H{"error": genericAuthError})
+		return
+	}
+
+	id, err := Save(c.Request.Context(), Session{UserID: u.UserID, Kind: KindStaff, Email: u.Email})
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "session failed"})
+		return
+	}
+	SetCookie(c, id)
+	clearAttempts(email)
+	audit.Write(c.Request.Context(), models.AuditEntry{
+		Actor: email, Action: "staff.login", IP: c.ClientIP()})
+	c.JSON(http.StatusOK, gin.H{"kind": KindStaff, "email": u.Email, "name": u.Name})
+}
+
+// dummyHash is a valid bcrypt hash of a random value, compared against when no
+// user exists so the timing profile matches.
+const dummyHash = "$2a$12$C6UzMDM.H6dfI/f/IKcEe.6qGZoAZQFtQmOoLmC5PbfW1uMh1Sv2u"
+
+func HandleLogout(c *gin.Context) {
+	if id, err := c.Cookie(CookieName); err == nil && id != "" {
+		Destroy(c.Request.Context(), id)
+	}
+	ClearCookie(c)
+	c.JSON(http.StatusOK, gin.H{"ok": true})
+}

admin/internal/billing/cloudprovision.go

@@ -0,0 +1,196 @@
+package billing
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/cloudprov"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// placeholderReconcileInterval is how often placeholders are swept: paid cloud
+// ones a failed webhook left unprovisioned are completed, and stale unpaid ones
+// of either deployment are reaped.
+const placeholderReconcileInterval = 5 * time.Minute
+
+// abandonedPlaceholderAfter is how long an unpaid placeholder may sit before it
+// is treated as an abandoned checkout and deleted. Comfortably longer than a
+// webhook's delivery lag, so a just-paid placeholder awaiting its subscription
+// event is never mistaken for an abandoned one.
+const abandonedPlaceholderAfter = 24 * time.Hour
+
+// StartPlaceholderReconciler owns the after-checkout lifecycle of placeholders.
+//
+// It recovers the one failure the webhook cannot on its own — a confirmed payment
+// whose provisioning handler errored, which is not retried once its event is
+// claimed and which the inject reconciler (licences only) does not repair — by
+// completing paid cloud placeholders here. And it reaps abandoned ones: a
+// placeholder with no subscription past abandonedPlaceholderAfter is a checkout
+// nobody finished, and deleting it loses nothing, because a placeholder has no
+// control-plane footprint until it is paid for and provisioned.
+func StartPlaceholderReconciler(ctx context.Context) {
+	go func() {
+		t := time.NewTicker(placeholderReconcileInterval)
+		defer t.Stop()
+		reconcilePlaceholders(ctx)
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-t.C:
+				reconcilePlaceholders(ctx)
+			}
+		}
+	}()
+}
+
+func reconcilePlaceholders(ctx context.Context) {
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{"placeholder": true})
+	if err != nil {
+		log.Printf("placeholder reconcile: query: %v", err)
+		return
+	}
+	var placeholders []models.Instance
+	if err := cur.All(ctx, &placeholders); err != nil {
+		log.Printf("placeholder reconcile: decode: %v", err)
+		return
+	}
+
+	now := time.Now().UTC()
+	for _, inst := range placeholders {
+		var sub models.Subscription
+		paid := db.Admin("subscriptions").FindOne(ctx,
+			bson.M{"instance_id": inst.InstanceID, "status": models.SubActive}).Decode(&sub) == nil
+
+		if !paid {
+			// Never paid for. Reap once it is old enough to be an abandoned
+			// checkout rather than one still awaiting its subscription webhook.
+			if now.Sub(inst.CreatedAt) > abandonedPlaceholderAfter {
+				if _, err := db.Admin("admin_instances").DeleteOne(ctx,
+					bson.M{"instance_id": inst.InstanceID, "placeholder": true}); err != nil {
+					log.Printf("placeholder reconcile: reap abandoned %s: %v", inst.InstanceID, err)
+				} else {
+					log.Printf("placeholder reconcile: reaped abandoned placeholder %s", inst.InstanceID)
+				}
+			}
+			continue
+		}
+
+		// Paid, self-hosted: nothing to provision — the customer installs and
+		// links, and lifecycle chases them. Only cloud is completed here.
+		if inst.Deployment != license.DeploymentCloud {
+			continue
+		}
+
+		items := make([]catalogue.Item, 0, len(sub.Items))
+		for _, it := range sub.Items {
+			items = append(items, catalogue.Item{PriceID: it.PriceID, Quantity: it.Quantity})
+		}
+		match, err := catalogue.ResolveItems(ctx, paddle.Get().Env(), items)
+		if err != nil {
+			log.Printf("placeholder reconcile: resolve items for %s: %v", inst.InstanceID, err)
+			continue
+		}
+		provisioned, err := completeCloudPlaceholder(ctx, &inst)
+		if err != nil {
+			log.Printf("placeholder reconcile: complete %s: %v", inst.InstanceID, err)
+			continue
+		}
+		if err := promoteAndIssue(ctx, provisioned, match, models.ReasonNew); err != nil {
+			log.Printf("placeholder reconcile: issue %s: %v", inst.InstanceID, err)
+			continue
+		}
+		log.Printf("placeholder reconcile: completed paid cloud instance %s", inst.InstanceID)
+	}
+}
+
+// completeCloudPlaceholder provisions the cloud instance a paid placeholder stands
+// for, once payment is confirmed, and returns the row promoted to a real instance.
+//
+// It is the payment-first half of the paid-cloud flow: createCloudCheckout made
+// the placeholder before payment, this provisions it after. The control-plane
+// instance is created with the placeholder's OWN id (cloudprov.CreateInstanceWithID),
+// so nothing is rewritten and the subscription's custom_data still resolves this
+// row on every later webhook.
+//
+// Every step is idempotent, because a webhook can be retried after this partly
+// ran: provisioning converges rather than duplicates, and the row flip and
+// membership insert are guarded on what they write. The caller then issues.
+func completeCloudPlaceholder(ctx context.Context, inst *models.Instance) (*models.Instance, error) {
+	cu, err := placeholderOwner(ctx, inst)
+	if err != nil {
+		return nil, err
+	}
+
+	prov, err := cloudprov.CreateInstanceWithID(ctx, inst.InstanceID, inst.Name,
+		cu.Email, cu.PasswordHash, cu.UserID)
+	if err != nil {
+		return nil, fmt.Errorf("provision cloud instance %s: %w", inst.InstanceID, err)
+	}
+
+	if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": inst.InstanceID},
+		bson.M{
+			"$set":   bson.M{"slug": prov.Slug, "status": models.StatusActive, "placeholder": false},
+			"$unset": bson.M{"pending_owner_user_id": ""},
+		}); err != nil {
+		return nil, fmt.Errorf("promote placeholder %s: %w", inst.InstanceID, err)
+	}
+
+	// Record the owner's membership. Best-effort and guarded on absence: the
+	// projected user is what grants access, so a missing row costs a line in the
+	// members panel, not access — and the boot backfill rebuilds it.
+	if ownerID, err := cloudprov.OwnerUserID(ctx, inst.InstanceID); err == nil {
+		if n, _ := db.Admin("instance_members").CountDocuments(ctx,
+			bson.M{"instance_id": inst.InstanceID, "customer_user_id": cu.UserID}); n == 0 {
+			if _, err := db.Admin("instance_members").InsertOne(ctx, models.InstanceMember{
+				MemberID:       uuid.NewString(),
+				AccountID:      inst.AccountID,
+				InstanceID:     inst.InstanceID,
+				CustomerUserID: cu.UserID,
+				ControlUserID:  ownerID,
+				Role:           sharedmodels.RoleOwner,
+				Email:          cu.Email,
+				CreatedAt:      time.Now().UTC(),
+			}); err != nil {
+				log.Printf("completeCloudPlaceholder: record owner membership for %s: %v",
+					inst.InstanceID, err)
+			}
+		}
+	}
+
+	next := *inst
+	next.Slug = prov.Slug
+	next.Status = models.StatusActive
+	next.Placeholder = false
+	next.PendingOwnerUserID = ""
+	return &next, nil
+}
+
+// placeholderOwner resolves the customer_user who should own a provisioned cloud
+// placeholder: the buyer recorded at checkout, or the account owner if that
+// pointer is somehow missing.
+func placeholderOwner(ctx context.Context, inst *models.Instance) (*models.CustomerUser, error) {
+	var cu models.CustomerUser
+	if inst.PendingOwnerUserID != "" {
+		if err := db.Admin("customer_users").FindOne(ctx,
+			bson.M{"user_id": inst.PendingOwnerUserID}).Decode(&cu); err == nil {
+			return &cu, nil
+		}
+	}
+	if err := db.Admin("customer_users").FindOne(ctx,
+		bson.M{"account_id": inst.AccountID, "account_role": models.AccountRoleOwner}).Decode(&cu); err != nil {
+		return nil, fmt.Errorf("no owner for account %s to provision %s: %w",
+			inst.AccountID, inst.InstanceID, err)
+	}
+	return &cu, nil
+}

admin/internal/billing/deliver.go

@@ -0,0 +1,24 @@
+package billing
+
+import (
+	"context"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/inject"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+)
+
+// deliver sends a freshly issued licence where it belongs. Cloud is injected;
+// self-hosted is emailed the blob (their database is theirs). This mirrors the
+// api-side deliver helper but takes no gin context — webhooks have none, and the
+// customer is not on the other end of the request.
+func deliver(ctx context.Context, inst *models.Instance, lic *models.License, to string) {
+	if inst.Deployment == license.DeploymentCloud {
+		inject.Deliver(ctx, lic)
+		return
+	}
+	if to != "" && mail.Enabled() {
+		_ = mail.Default.SendLicense(to, inst.Name, lic.Blob)
+	}
+}

admin/internal/billing/events.go

@@ -0,0 +1,51 @@
+// Package billing turns verified Paddle webhooks into licence actions. It never
+// verifies signatures (that is paddle.VerifySignature at the edge) and never
+// signs (that is licensing.Issue); it decides what a subscription's current
+// state means and calls the issuer.
+package billing
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+// Event is the decoded Paddle webhook envelope. Data is left raw so each handler
+// decodes only the shape it needs.
+type Event struct {
+	EventID    string          `json:"event_id"`
+	EventType  string          `json:"event_type"`
+	OccurredAt time.Time       `json:"occurred_at"`
+	Data       json.RawMessage `json:"data"`
+}
+
+// Dispatch routes one event to its handler. Unknown event types are a no-op
+// success: Paddle sends many we do not care about, and 200 stops it retrying.
+func Dispatch(ctx context.Context, ev Event) error {
+	switch ev.EventType {
+	case "subscription.created", "subscription.updated", "subscription.activated":
+		return handleSubscription(ctx, ev)
+	case "subscription.canceled":
+		return handleCanceled(ctx, ev)
+	case "subscription.past_due":
+		return handlePastDue(ctx, ev)
+	case "transaction.completed":
+		return handleTransactionCompleted(ctx, ev)
+	case "transaction.payment_failed":
+		return handlePaymentFailed(ctx, ev)
+	case "customer.updated":
+		return handleCustomerUpdated(ctx, ev)
+	default:
+		return nil
+	}
+}
+
+// decode is a small helper so every handler decodes Data the same way.
+func decode[T any](ev Event) (T, error) {
+	var v T
+	if err := json.Unmarshal(ev.Data, &v); err != nil {
+		return v, fmt.Errorf("decode %s: %w", ev.EventType, err)
+	}
+	return v, nil
+}

admin/internal/billing/subscription.go

@@ -0,0 +1,318 @@
+package billing
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/licensing"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+// subscriptionData is the slice of Paddle's subscription payload we read. Fields
+// we ignore are simply absent — encoding/json drops them.
+type subscriptionData struct {
+	ID         string `json:"id"`
+	CustomerID string `json:"customer_id"`
+	Status     string `json:"status"`
+	CustomData struct {
+		AccountID  string `json:"account_id"`
+		InstanceID string `json:"instance_id"`
+	} `json:"custom_data"`
+	CurrentBillingPeriod struct {
+		EndsAt time.Time `json:"ends_at"`
+	} `json:"current_billing_period"`
+	Items []struct {
+		Price struct {
+			ID string `json:"id"`
+		} `json:"price"`
+		Quantity int `json:"quantity"`
+	} `json:"items"`
+}
+
+func (d subscriptionData) lineItems() []catalogue.Item {
+	items := make([]catalogue.Item, 0, len(d.Items))
+	for _, it := range d.Items {
+		items = append(items, catalogue.Item{PriceID: it.Price.ID, Quantity: it.Quantity})
+	}
+	return items
+}
+
+// handleSubscription folds created/updated/activated into one job: make the
+// world match the subscription's CURRENT state. That is what keeps out-of-order
+// delivery correct — an updated arriving before its created still carries the
+// full item list, so reading all of it is reading current state, not a
+// transition.
+func handleSubscription(ctx context.Context, ev Event) error {
+	d, err := decode[subscriptionData](ev)
+	if err != nil {
+		return err
+	}
+	if d.CustomData.InstanceID == "" {
+		return fmt.Errorf("subscription %s has no instance_id in custom_data", d.ID)
+	}
+
+	match, err := catalogue.ResolveItems(ctx, paddle.Get().Env(), d.lineItems())
+	if err != nil {
+		// A price we cannot map is a configuration error, not a customer error.
+		// Fail loudly so it is retried and surfaced rather than guessed.
+		return fmt.Errorf("resolve items for subscription %s: %w", d.ID, err)
+	}
+
+	// Resolve BEFORE recording. A self-hosted subscription's custom_data is
+	// written at checkout and names the placeholder; the claim rewrote the
+	// instance's identity to the install's real UUID and patched Paddle, but that
+	// patch is best-effort and any event already in flight still carries the old
+	// id. Writing it straight through would revert the linked subscription row and
+	// then fail to find the instance, wedging every renewal.
+	instanceID, inst, err := resolveInstance(ctx, d.CustomData.InstanceID)
+	if err != nil {
+		return fmt.Errorf("subscription %s names unknown instance %s: %w",
+			d.ID, d.CustomData.InstanceID, err)
+	}
+
+	sub := models.Subscription{
+		AccountID:            d.CustomData.AccountID,
+		InstanceID:           instanceID,
+		PaddleSubscriptionID: d.ID,
+		Tier:                 match.Tier,
+		Term:                 match.Term,
+		Status:               d.Status,
+		CurrentPeriodEnd:     d.CurrentBillingPeriod.EndsAt,
+		Items:                toSubItems(d.lineItems()),
+	}
+	if err := upsertSubscription(ctx, sub); err != nil {
+		return err
+	}
+
+	// Learn the Paddle customer ID onto the account the first time we see it.
+	if d.CustomerID != "" && d.CustomData.AccountID != "" {
+		_, _ = db.Admin("accounts").UpdateOne(ctx,
+			bson.M{"account_id": d.CustomData.AccountID, "paddle_customer_id": bson.M{"$in": bson.A{nil, ""}}},
+			bson.M{"$set": bson.M{"paddle_customer_id": d.CustomerID}})
+	}
+
+	// Placeholders are the payment-first path: the instance does not exist until
+	// this confirmed-payment event. A cloud placeholder is provisioned here and
+	// then issued (first term). A self-hosted placeholder has no UUID to bind to
+	// until the customer pastes their install's — its subscription is recorded and
+	// the link endpoint issues later.
+	reason := models.ReasonEntitlementChange
+	if inst.Placeholder {
+		if inst.Deployment != license.DeploymentCloud {
+			return nil
+		}
+		provisioned, err := completeCloudPlaceholder(ctx, &inst)
+		if err != nil {
+			return err
+		}
+		inst = *provisioned
+		reason = models.ReasonNew
+	}
+
+	return promoteAndIssue(ctx, &inst, match, reason)
+}
+
+// resolveInstance finds the instance a webhook's custom_data names, following the
+// identity trail when the id is one a placeholder claim or a relink has since
+// replaced. It returns the instance's CURRENT id, which is the only id anything
+// else should be written against.
+func resolveInstance(ctx context.Context, customDataID string) (string, models.Instance, error) {
+	var inst models.Instance
+	err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": customDataID}).Decode(&inst)
+	if err == nil {
+		return inst.InstanceID, inst, nil
+	}
+	if !errors.Is(err, mongo.ErrNoDocuments) {
+		return "", inst, err
+	}
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"previous_instance_ids": customDataID}).Decode(&inst); err != nil {
+		return "", inst, err
+	}
+	return inst.InstanceID, inst, nil
+}
+
+// promoteAndIssue promotes desired→granted from the resolved match, then signs a
+// licence from granted. This is the only promotion path other than the staff
+// grant, and it exists because a webhook is a confirmed payment.
+func promoteAndIssue(ctx context.Context, inst *models.Instance, match catalogue.Match, reason string) error {
+	plan, err := models.GetPlan(ctx, inst.Deployment, match.Tier)
+	if err != nil {
+		return fmt.Errorf("no plan for %s/%s: %w", inst.Deployment, match.Tier, err)
+	}
+	granted := models.Config{
+		Servers:  match.Servers,
+		Features: models.Features(match.Features).OrEmpty(),
+	}
+	limits, _, err := catalogue.Resolve(ctx, plan, granted)
+	if err != nil {
+		return err
+	}
+	if err := models.UpsertEntitlement(ctx, models.Entitlement{
+		InstanceID:     inst.InstanceID,
+		AccountID:      inst.AccountID,
+		Deployment:     inst.Deployment,
+		Tier:           match.Tier,
+		Term:           match.Term,
+		Desired:        granted,
+		Granted:        granted,
+		ResolvedLimits: limits,
+	}); err != nil {
+		return err
+	}
+
+	lic, err := licensing.Issue(ctx, licensing.IssueInput{
+		InstanceID: inst.InstanceID,
+		Tier:       match.Tier,
+		Term:       match.Term,
+		Reason:     reason,
+		IssuedBy:   "paddle",
+	})
+	if err != nil {
+		return fmt.Errorf("issue for %s: %w", inst.InstanceID, err)
+	}
+	deliver(ctx, inst, lic, billingEmailFor(ctx, inst.AccountID))
+	return nil
+}
+
+// handleCanceled marks the SUBSCRIPTION cancelled and takes NO licence action.
+//
+// The instance stays active until its licence expires, when the existing
+// lifecycle sweep lapses it. Flipping the instance to cancelled here would stop
+// inject.Reconcile and the sweep repairing a licence that is still valid — the
+// opposite of "keeps working until it expires".
+func handleCanceled(ctx context.Context, ev Event) error {
+	d, err := decode[subscriptionData](ev)
+	if err != nil {
+		return err
+	}
+	if _, err := db.Admin("subscriptions").UpdateOne(ctx,
+		bson.M{"paddle_subscription_id": d.ID},
+		bson.M{"$set": bson.M{"status": models.SubCanceled}}); err != nil {
+		return err
+	}
+	if to := billingEmailFor(ctx, d.CustomData.AccountID); to != "" {
+		_ = mail.Default.SendCancelled(to, instanceNameFor(ctx, d.CustomData.InstanceID))
+	}
+	return nil
+}
+
+// handlePastDue flags the subscription and notifies, but leaves the licence
+// alone. Dunning is Paddle's; ours is not to punish a retryable card failure.
+func handlePastDue(ctx context.Context, ev Event) error {
+	d, err := decode[subscriptionData](ev)
+	if err != nil {
+		return err
+	}
+	if _, err := db.Admin("subscriptions").UpdateOne(ctx,
+		bson.M{"paddle_subscription_id": d.ID},
+		bson.M{"$set": bson.M{"status": models.SubPastDue}}); err != nil {
+		return err
+	}
+	if to := billingEmailFor(ctx, d.CustomData.AccountID); to != "" {
+		_ = mail.Default.SendPastDue(to, instanceNameFor(ctx, d.CustomData.InstanceID))
+	}
+	return nil
+}
+
+// handleCustomerUpdated syncs the billing email onto the account.
+func handleCustomerUpdated(ctx context.Context, ev Event) error {
+	d, err := decode[struct {
+		ID    string `json:"id"`
+		Email string `json:"email"`
+	}](ev)
+	if err != nil {
+		return err
+	}
+	if d.ID == "" || d.Email == "" {
+		return nil
+	}
+	_, err = db.Admin("accounts").UpdateOne(ctx,
+		bson.M{"paddle_customer_id": d.ID},
+		bson.M{"$set": bson.M{"billing_email": d.Email}})
+	return err
+}
+
+// IssueForInstance issues from an instance's recorded subscription. Called when
+// a self-hosted customer finally links a placeholder they have already paid for.
+func IssueForInstance(ctx context.Context, instanceID string) error {
+	var sub models.Subscription
+	if err := db.Admin("subscriptions").FindOne(ctx,
+		bson.M{"instance_id": instanceID, "status": models.SubActive}).Decode(&sub); err != nil {
+		return fmt.Errorf("no active subscription for %s: %w", instanceID, err)
+	}
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": instanceID}).Decode(&inst); err != nil {
+		return err
+	}
+	items := make([]catalogue.Item, 0, len(sub.Items))
+	for _, it := range sub.Items {
+		items = append(items, catalogue.Item{PriceID: it.PriceID, Quantity: it.Quantity})
+	}
+	match, err := catalogue.ResolveItems(ctx, paddle.Get().Env(), items)
+	if err != nil {
+		return err
+	}
+	return promoteAndIssue(ctx, &inst, match, models.ReasonNew)
+}
+
+func toSubItems(items []catalogue.Item) []models.SubItem {
+	out := make([]models.SubItem, 0, len(items))
+	for _, it := range items {
+		out = append(out, models.SubItem{PriceID: it.PriceID, Quantity: it.Quantity})
+	}
+	return out
+}
+
+func upsertSubscription(ctx context.Context, sub models.Subscription) error {
+	_, err := db.Admin("subscriptions").UpdateOne(ctx,
+		bson.M{"paddle_subscription_id": sub.PaddleSubscriptionID},
+		bson.M{"$set": bson.M{
+			"account_id":         sub.AccountID,
+			"instance_id":        sub.InstanceID,
+			"tier":               sub.Tier,
+			"term":               sub.Term,
+			"status":             sub.Status,
+			"current_period_end": sub.CurrentPeriodEnd,
+			"items":              sub.Items,
+		}, "$setOnInsert": bson.M{
+			"subscription_id":        uuid.NewString(),
+			"paddle_subscription_id": sub.PaddleSubscriptionID,
+		}},
+		options.UpdateOne().SetUpsert(true))
+	return err
+}
+
+// billingEmailFor reads the account's billing email for self-hosted delivery.
+func billingEmailFor(ctx context.Context, accountID string) string {
+	var acc models.Account
+	if err := db.Admin("accounts").FindOne(ctx,
+		bson.M{"account_id": accountID}).Decode(&acc); err != nil {
+		return ""
+	}
+	return acc.BillingEmail
+}
+
+// instanceNameFor is a best-effort display name for an email subject.
+func instanceNameFor(ctx context.Context, instanceID string) string {
+	// Alias-aware: a cancellation can name a placeholder id, and "your instance"
+	// in place of the name the customer chose reads like the wrong email.
+	_, inst, err := resolveInstance(ctx, instanceID)
+	if err != nil || inst.Name == "" {
+		return "your instance"
+	}
+	return inst.Name
+}

admin/internal/billing/transaction.go

@@ -0,0 +1,124 @@
+package billing
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+type transactionData struct {
+	ID             string `json:"id"`
+	SubscriptionID string `json:"subscription_id"`
+	Origin         string `json:"origin"`
+	Items          []struct {
+		Price struct {
+			ID string `json:"id"`
+		} `json:"price"`
+		Quantity int `json:"quantity"`
+	} `json:"items"`
+}
+
+// handleTransactionCompleted issues the next term's licence on a renewal.
+//
+// A renewal is the one moment a scheduled REDUCTION takes effect: the customer's
+// desired (smaller) configuration becomes granted. Mid-term reductions never
+// shrink a live licence. On a first charge (origin not recurring) the
+// subscription.created/updated handler already issued, so this is a no-op to
+// avoid a double issue.
+func handleTransactionCompleted(ctx context.Context, ev Event) error {
+	d, err := decode[transactionData](ev)
+	if err != nil {
+		return err
+	}
+	if d.Origin != "subscription_recurring" {
+		return nil
+	}
+	if d.SubscriptionID == "" {
+		return fmt.Errorf("renewal transaction %s has no subscription_id", d.ID)
+	}
+
+	var sub models.Subscription
+	if err := db.Admin("subscriptions").FindOne(ctx,
+		bson.M{"paddle_subscription_id": d.SubscriptionID}).Decode(&sub); err != nil {
+		return fmt.Errorf("renewal for unknown subscription %s: %w", d.SubscriptionID, err)
+	}
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": sub.InstanceID}).Decode(&inst); err != nil {
+		return fmt.Errorf("renewal names unknown instance %s: %w", sub.InstanceID, err)
+	}
+
+	// Prefer the transaction's own item list (authoritative for this period);
+	// fall back to the subscription's recorded items.
+	items := make([]catalogue.Item, 0, len(d.Items))
+	for _, it := range d.Items {
+		items = append(items, catalogue.Item{PriceID: it.Price.ID, Quantity: it.Quantity})
+	}
+	if len(items) == 0 {
+		for _, it := range sub.Items {
+			items = append(items, catalogue.Item{PriceID: it.PriceID, Quantity: it.Quantity})
+		}
+	}
+	match, err := catalogue.ResolveItems(ctx, paddle.Get().Env(), items)
+	if err != nil {
+		return fmt.Errorf("resolve renewal items for %s: %w", d.SubscriptionID, err)
+	}
+
+	// Collapse a scheduled reduction: desired becomes granted, and the pending
+	// marker is cleared, since a new term has begun. This is the only place a
+	// licence ever gets a smaller cap.
+	if err := promoteScheduledReduction(ctx, inst.InstanceID); err != nil {
+		return err
+	}
+
+	// Issue the next term. Renewal resets relink_count inside licensing.Issue.
+	if err := promoteAndIssue(ctx, &inst, match, models.ReasonRenewal); err != nil {
+		return err
+	}
+
+	// Clear lifecycle notices so the next term starts the sequence fresh (mirrors
+	// the self-serve renew path).
+	_, _ = db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": inst.InstanceID},
+		bson.M{"$unset": bson.M{"notices_sent": ""}})
+	return nil
+}
+
+// promoteScheduledReduction collapses a pending reduction into granted at
+// renewal and clears scheduled_change_at. A no-op when nothing is pending — the
+// match resolved from the renewal's items is authoritative either way, so this
+// only keeps the entitlement's own bookkeeping honest.
+func promoteScheduledReduction(ctx context.Context, instanceID string) error {
+	ent, err := models.GetEntitlement(ctx, instanceID)
+	if err != nil {
+		return nil // no entitlement to reconcile
+	}
+	if ent.ScheduledChangeAt == nil {
+		return nil
+	}
+	ent.Granted = ent.Desired
+	ent.ScheduledChangeAt = nil
+	return models.UpsertEntitlement(ctx, *ent)
+}
+
+// handlePaymentFailed records the failure for staff visibility. No licence
+// action — the licence runs to its (grace-padded) expiry and Paddle retries.
+func handlePaymentFailed(ctx context.Context, ev Event) error {
+	d, err := decode[transactionData](ev)
+	if err != nil {
+		return err
+	}
+	if d.SubscriptionID == "" {
+		return nil
+	}
+	_, err = db.Admin("subscriptions").UpdateOne(ctx,
+		bson.M{"paddle_subscription_id": d.SubscriptionID},
+		bson.M{"$set": bson.M{"status": models.SubPastDue}})
+	return err
+}

admin/internal/catalogue/catalogue.go

@@ -0,0 +1,120 @@
+// Package catalogue turns an entitlement into the two things derived from it:
+// the limits and features a licence grants, and the Paddle line items a
+// subscription is made of.
+//
+// Both folds live here so the arithmetic exists once. The temptation is to
+// compute limits in the issuer and quantities in the checkout, and then the two
+// disagree about whether the base allowance is included in the number — which is
+// a bug that bills a customer for three servers they were given.
+package catalogue
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+)
+
+var (
+	// ErrUnknownPrice means an item named a price ID no catalogue row claims.
+	//
+	// This is always a configuration error and never a customer error: someone
+	// bought something at a price we cannot map to a plan. It must fail loudly
+	// rather than guess a tier — a guessed tier is a wrong licence with no
+	// record of why.
+	ErrUnknownPrice = errors.New("no catalogue row claims that price ID")
+
+	// ErrNoBaseItem means no item matched a base row, so the subscription names
+	// no plan. Quantities are meaningless without one.
+	ErrNoBaseItem = errors.New("no item matches a base price; the subscription names no plan")
+
+	// ErrTermNotSold means a price resolved to a term its deployment does not
+	// sell — in practice a self-hosted monthly price.
+	ErrTermNotSold = errors.New("that deployment does not sell that term")
+
+	// ErrUnpriced means a component needed for this configuration has no price
+	// ID in this environment. Refusing is correct: a checkout that silently
+	// drops a paid line item gives away the thing it was meant to charge for.
+	ErrUnpriced = errors.New("component has no price in this environment")
+)
+
+// Resolve folds a configuration into the limits and features a licence grants.
+//
+// Limits start at the plan's base and each metered component adds its configured
+// amount. Features are the plan's base features plus the configured ones,
+// deduplicated and filtered to keys the catalogue actually offers — a stale
+// feature key in a stored entitlement must not survive into a signed payload.
+func Resolve(ctx context.Context, plan *models.Plan, cfg models.Config) (license.Limits, []string, error) {
+	rows, err := models.CatalogueFor(ctx, plan.Deployment, plan.Tier)
+	if err != nil {
+		return license.Limits{}, nil, err
+	}
+
+	limits := plan.BaseLimits
+	offered := map[string]bool{}
+	for _, r := range rows {
+		switch r.Kind {
+		case models.KindLimit:
+			if err := addLimit(&limits, r.LimitKey, configured(cfg, r.LimitKey), plan.BaseLimits); err != nil {
+				return license.Limits{}, nil, err
+			}
+		case models.KindFeature:
+			offered[r.FeatureKey] = true
+		}
+	}
+
+	seen := map[string]bool{}
+	features := []string{}
+	for _, f := range plan.BaseFeatures {
+		if !seen[f] {
+			seen[f] = true
+			features = append(features, f)
+		}
+	}
+	for _, f := range cfg.Features {
+		if seen[f] || !offered[f] {
+			continue
+		}
+		seen[f] = true
+		features = append(features, f)
+	}
+	return limits, features, nil
+}
+
+// configured reads the configured total for one metered limit key.
+//
+// A switch rather than reflection, so every metered dimension is greppable and
+// adding one is a visible edit here as well as a catalogue row.
+func configured(cfg models.Config, limitKey string) int {
+	switch limitKey {
+	case models.LimitKeyServers:
+		return cfg.Servers
+	default:
+		return 0
+	}
+}
+
+// addLimit sets a metered limit to its configured total.
+//
+// The configured value is a TOTAL, not an increment, so this assigns rather than
+// adds. A base of Unlimited is left alone: nothing can be added to no cap, and a
+// plan that meters an already-unlimited dimension is a configuration mistake
+// rather than something to compute around.
+func addLimit(l *license.Limits, limitKey string, total int, base license.Limits) error {
+	switch limitKey {
+	case models.LimitKeyServers:
+		if base.MaxServers == license.Unlimited {
+			return nil
+		}
+		if total > base.MaxServers {
+			l.MaxServers = total
+		}
+		return nil
+	case "":
+		return fmt.Errorf("catalogue limit row has no limit_key")
+	default:
+		return fmt.Errorf("%w: limit_key %q", ErrUnknownPrice, limitKey)
+	}
+}

admin/internal/catalogue/items.go

@@ -0,0 +1,206 @@
+package catalogue
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+)
+
+// Item is one Paddle line item: a price and how many of it.
+type Item struct {
+	PriceID  string `json:"price_id"`
+	Quantity int    `json:"quantity"`
+}
+
+// LineItems builds the subscription items for a configuration.
+//
+// The base row is always quantity 1. A metered row's quantity is the configured
+// TOTAL minus the plan's base allowance, so a Professional customer at exactly
+// three servers has a single-item subscription rather than one with a zero
+// quantity Paddle would reject. A feature with no price in this environment
+// produces no item and is granted free.
+func LineItems(ctx context.Context, env, term string, plan *models.Plan, cfg models.Config) ([]Item, error) {
+	if !sells(plan.Deployment, term) {
+		return nil, fmt.Errorf("%w: %s does not sell %s", ErrTermNotSold, plan.Deployment, term)
+	}
+	rows, err := models.CatalogueFor(ctx, plan.Deployment, plan.Tier)
+	if err != nil {
+		return nil, err
+	}
+	if len(rows) == 0 {
+		return nil, fmt.Errorf("%w: %s/%s is priced by nothing",
+			ErrUnpriced, plan.Deployment, plan.Tier)
+	}
+
+	wanted := map[string]bool{}
+	for _, f := range cfg.Features {
+		wanted[f] = true
+	}
+
+	items := []Item{}
+	for _, r := range rows {
+		switch r.Kind {
+		case models.KindBase:
+			id := r.PriceID(env, term)
+			if id == "" {
+				return nil, fmt.Errorf("%w: base price for %s/%s in %s",
+					ErrUnpriced, plan.Deployment, plan.Tier, env)
+			}
+			items = append(items, Item{PriceID: id, Quantity: 1})
+
+		case models.KindLimit:
+			qty := billable(cfg, r.LimitKey, plan.BaseLimits)
+			if qty <= 0 {
+				continue
+			}
+			id := r.PriceID(env, term)
+			if id == "" {
+				return nil, fmt.Errorf("%w: %s price for %s/%s in %s",
+					ErrUnpriced, r.LimitKey, plan.Deployment, plan.Tier, env)
+			}
+			items = append(items, Item{PriceID: id, Quantity: qty})
+
+		case models.KindFeature:
+			if !wanted[r.FeatureKey] {
+				continue
+			}
+			id := r.PriceID(env, term)
+			if id == "" {
+				// Free to toggle. Resolve() still grants it.
+				continue
+			}
+			items = append(items, Item{PriceID: id, Quantity: 1})
+		}
+	}
+	return items, nil
+}
+
+// billable is how many UNITS to charge for a metered dimension.
+//
+// The configured value is the total the customer sees, which includes the base
+// allowance they were given. Charging for that base is the single most likely
+// bug in this file, so the subtraction lives here and nowhere else.
+func billable(cfg models.Config, limitKey string, base license.Limits) int {
+	switch limitKey {
+	case models.LimitKeyServers:
+		if base.MaxServers == license.Unlimited {
+			return 0
+		}
+		return cfg.Servers - base.MaxServers
+	default:
+		return 0
+	}
+}
+
+// Match is what an item list says about itself.
+type Match struct {
+	Deployment string
+	Tier       string
+	Term       string
+	Servers    int
+	Features   []string
+}
+
+// ResolveItems maps a full item list back to a plan and a configuration.
+//
+// This replaces a price-ID-to-tier lookup, which cannot work once a subscription
+// has several prices. The base item identifies the plan and the term; everything
+// else is read relative to it. An item matching nothing fails the whole list.
+//
+// Only the running environment's IDs are consulted, so a production process
+// cannot be talked into resolving a sandbox price by a forged or misrouted
+// event.
+//
+// It is a function of the COMPLETE list, which is what keeps out-of-order
+// delivery correct by construction: Paddle sends every item on every
+// subscription event, so reading all of them is reading current state rather
+// than a transition.
+func ResolveItems(ctx context.Context, env string, items []Item) (Match, error) {
+	all, err := models.AllCatalogue(ctx)
+	if err != nil {
+		return Match{}, err
+	}
+
+	// Pass 1: find the base item. Until we know the plan, no other item means
+	// anything — a quantity of 7 is 7 of what?
+	var m Match
+	found := false
+	for _, it := range items {
+		for _, r := range all {
+			if r.Kind != models.KindBase {
+				continue
+			}
+			for _, term := range []string{"monthly", "annual"} {
+				if r.PriceID(env, term) != it.PriceID || it.PriceID == "" {
+					continue
+				}
+				if found {
+					return Match{}, fmt.Errorf(
+						"item list names two plans: %s/%s and %s/%s",
+						m.Deployment, m.Tier, r.Deployment, r.Tier)
+				}
+				m.Deployment, m.Tier, m.Term = r.Deployment, r.Tier, term
+				found = true
+			}
+		}
+	}
+	if !found {
+		return Match{}, ErrNoBaseItem
+	}
+	if !sells(m.Deployment, m.Term) {
+		return Match{}, fmt.Errorf("%w: price resolves to %s %s; remove it from the catalogue",
+			ErrTermNotSold, m.Deployment, m.Term)
+	}
+
+	plan, err := models.GetPlan(ctx, m.Deployment, m.Tier)
+	if err != nil {
+		return Match{}, fmt.Errorf("item list names plan %s/%s, which does not exist: %w",
+			m.Deployment, m.Tier, err)
+	}
+	m.Servers = plan.BaseLimits.MaxServers
+	m.Features = []string{}
+
+	// Pass 2: everything else, relative to that plan. An item matching no row of
+	// this plan is a configuration error even if it matches some other plan's
+	// row — mixing two plans in one subscription is not a thing we sell.
+	rows, err := models.CatalogueFor(ctx, m.Deployment, m.Tier)
+	if err != nil {
+		return Match{}, err
+	}
+	for _, it := range items {
+		matched := false
+		for _, r := range rows {
+			if r.PriceID(env, m.Term) != it.PriceID {
+				continue
+			}
+			matched = true
+			switch r.Kind {
+			case models.KindBase:
+				// Already handled.
+			case models.KindLimit:
+				if r.LimitKey == models.LimitKeyServers {
+					m.Servers = plan.BaseLimits.MaxServers + it.Quantity
+				}
+			case models.KindFeature:
+				m.Features = append(m.Features, r.FeatureKey)
+			}
+		}
+		if !matched {
+			return Match{}, fmt.Errorf("%w: %s (environment %s, plan %s/%s)",
+				ErrUnknownPrice, it.PriceID, env, m.Deployment, m.Tier)
+		}
+	}
+	return m, nil
+}
+
+// sells reports whether a deployment offers a term.
+func sells(deployment, term string) bool {
+	for _, t := range license.TermsFor(deployment) {
+		if t == term {
+			return true
+		}
+	}
+	return false
+}

admin/internal/cloudprov/cloudprov.go

@@ -0,0 +1,204 @@
+// Package cloudprov provisions cloud instances in the control plane.
+//
+// This is admin's second and final write path into the control-plane database,
+// alongside inject. It writes `instances` and `users` and nothing else. A third
+// write target, or a write to any other collection from here, is a design change
+// and not a refactor — see the spec's "Admin's control-plane write boundary".
+//
+// Every function here is called from a customer request, so each one leaves the
+// control plane in a consistent state or not at all: the caller unwinds in
+// reverse order on failure, and RollbackInstance refuses to delete an instance
+// that has users.
+package cloudprov
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/provision"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// CreateInstance creates a control-plane instance and its owner.
+//
+// The owner's password hash is COPIED from the HQ account rather than shared.
+// HQ remains the single source of truth: a password change there copies the new
+// hash to every projected row (see SetPasswordHash), and hqsync repairs any that
+// a failed write left stale. The control plane has no local password-change path
+// for an hq-sourced row, so there is no competing writer.
+//
+// On owner-insert failure the instance is rolled back, so a failed provision
+// never leaves a slug permanently occupied by an instance nobody owns.
+func CreateInstance(ctx context.Context, name, ownerEmail, ownerPasswordHash, hqUserID string) (*sharedmodels.Instance, error) {
+	return CreateInstanceWithID(ctx, uuid.NewString(), name, ownerEmail, ownerPasswordHash, hqUserID)
+}
+
+// CreateInstanceWithID provisions a cloud instance under a caller-supplied ID and
+// its owner. It backs the paid-cloud flow, where the ID is a placeholder created
+// before payment and provisioning runs on the confirmed-payment webhook (see
+// provision.CreateInstanceWithID).
+//
+// It is idempotent, because a webhook can be retried after provisioning partly
+// completed: the instance is created only if absent, and the owner only if the
+// instance has none yet. A second call therefore converges to the same state
+// rather than colliding on the per-instance email unique index.
+func CreateInstanceWithID(ctx context.Context, instanceID, name, ownerEmail, ownerPasswordHash, hqUserID string) (*sharedmodels.Instance, error) {
+	inst, err := provision.CreateInstanceWithID(ctx, db.ControlDB(), instanceID, name)
+	if err != nil {
+		return nil, err
+	}
+
+	// A retry that already created the owner must not create a second one.
+	if _, err := OwnerUserID(ctx, inst.InstanceID); err == nil {
+		return inst, nil
+	}
+
+	u, err := provision.CreateUserWithHash(ctx, db.ControlDB(), inst.InstanceID,
+		ownerEmail, ownerPasswordHash, sharedmodels.RoleOwner, sharedmodels.AuthHQ)
+	if err != nil {
+		if rbErr := provision.RollbackInstance(ctx, db.ControlDB(), inst.InstanceID); rbErr != nil {
+			return nil, fmt.Errorf("create owner: %w (and rollback failed: %v)", err, rbErr)
+		}
+		return nil, err
+	}
+
+	// hq_user_id is what phase 3 uses to find every row projected from one HQ
+	// user when its password changes. Set at creation so the owner is not a
+	// special case later.
+	if _, err := db.Control("users").UpdateOne(ctx,
+		bson.M{"user_id": u.UserID},
+		bson.M{"$set": bson.M{"hq_user_id": hqUserID}}); err != nil {
+		return nil, fmt.Errorf("set hq_user_id: %w", err)
+	}
+
+	return inst, nil
+}
+
+// DeleteUser removes one control-plane user. Used only to unwind a failed
+// provision.
+func DeleteUser(ctx context.Context, instanceID, userID string) error {
+	_, err := db.Control("users").DeleteOne(ctx,
+		bson.M{"instance_id": instanceID, "user_id": userID})
+	return err
+}
+
+// RollbackInstance deletes an instance that has no users.
+func RollbackInstance(ctx context.Context, instanceID string) error {
+	return provision.RollbackInstance(ctx, db.ControlDB(), instanceID)
+}
+
+// OwnerUserID returns the control-plane user_id of an instance's owner, so a
+// caller can unwind a partial provision without re-deriving it.
+func OwnerUserID(ctx context.Context, instanceID string) (string, error) {
+	var u sharedmodels.User
+	err := db.Control("users").FindOne(ctx, bson.M{
+		"instance_id": instanceID,
+		"role":        sharedmodels.RoleOwner,
+	}).Decode(&u)
+	if err != nil {
+		return "", err
+	}
+	return u.UserID, nil
+}
+
+// GrantUser projects an HQ person into a control-plane instance.
+//
+// The password hash is copied from customer_users rather than re-derived: HQ
+// owns the password, and a grant that asked for a password again would create
+// a second credential for one person.
+//
+// The row is written with auth_source "hq" and hq_user_id set, which is what
+// makes the control plane refuse to edit it locally and what lets a password
+// change find it later.
+func GrantUser(ctx context.Context, instanceID, email, passwordHash, role, hqUserID string) (*sharedmodels.User, error) {
+	u, err := provision.CreateUserWithHash(ctx, db.ControlDB(), instanceID,
+		email, passwordHash, role, sharedmodels.AuthHQ)
+	if err != nil {
+		return nil, err
+	}
+	if _, err := db.Control("users").UpdateOne(ctx,
+		bson.M{"user_id": u.UserID},
+		bson.M{"$set": bson.M{"hq_user_id": hqUserID}}); err != nil {
+		// Unwind: a projected row with no hq_user_id is invisible to revoke and
+		// to password propagation, which is worse than no row at all.
+		_, _ = db.Control("users").DeleteOne(ctx, bson.M{"user_id": u.UserID})
+		return nil, fmt.Errorf("set hq_user_id: %w", err)
+	}
+	u.HQUserID = hqUserID
+	return u, nil
+}
+
+// RevokeUser deletes the projected row for one person in one instance.
+//
+// Deleting rather than disabling is deliberate: the control plane has no
+// concept of a disabled user, and a row that still exists is a row that can
+// still sign in.
+func RevokeUser(ctx context.Context, instanceID, hqUserID string) error {
+	_, err := db.Control("users").DeleteOne(ctx, bson.M{
+		"instance_id": instanceID,
+		"hq_user_id":  hqUserID,
+	})
+	return err
+}
+
+// SetMemberRole changes a projected user's role inside one instance.
+func SetMemberRole(ctx context.Context, instanceID, hqUserID, role string) error {
+	if !sharedmodels.ValidRole(role) {
+		return fmt.Errorf("invalid role %q", role)
+	}
+	res, err := db.Control("users").UpdateOne(ctx,
+		bson.M{"instance_id": instanceID, "hq_user_id": hqUserID},
+		bson.M{"$set": bson.M{"role": role}})
+	if err != nil {
+		return err
+	}
+	if res.MatchedCount == 0 {
+		return fmt.Errorf("no projected user in instance %s", instanceID)
+	}
+	return nil
+}
+
+// CountOtherOwners counts owners of an instance other than one HQ person.
+//
+// It counts CONTROL-PLANE owners, so an owner created locally inside the
+// instance counts too. That matters: refusing to revoke the last HQ owner of
+// an instance that has three local owners would be a refusal with no cause.
+//
+// $ne matches documents where the field is absent, which is exactly how a
+// locally-created owner is stored.
+func CountOtherOwners(ctx context.Context, instanceID, exceptHQUserID string) (int64, error) {
+	return db.Control("users").CountDocuments(ctx, bson.M{
+		"instance_id": instanceID,
+		"role":        sharedmodels.RoleOwner,
+		"hq_user_id":  bson.M{"$ne": exceptHQUserID},
+	})
+}
+
+// SetPasswordHash writes one hash to every row projected from one HQ person,
+// across every instance, and reports how many it changed.
+func SetPasswordHash(ctx context.Context, hqUserID, hash string) (int64, error) {
+	res, err := db.Control("users").UpdateMany(ctx,
+		bson.M{"hq_user_id": hqUserID},
+		bson.M{"$set": bson.M{"password_hash": hash}})
+	if err != nil {
+		return 0, err
+	}
+	return res.ModifiedCount, nil
+}
+
+// ProjectedUsers returns every control-plane row projected from one HQ person.
+// hqsync uses it to compare hashes.
+func ProjectedUsers(ctx context.Context, hqUserID string) ([]sharedmodels.User, error) {
+	cur, err := db.Control("users").Find(ctx, bson.M{"hq_user_id": hqUserID})
+	if err != nil {
+		return nil, err
+	}
+	var users []sharedmodels.User
+	if err := cur.All(ctx, &users); err != nil {
+		return nil, err
+	}
+	return users, nil
+}

admin/internal/config/config.go

@@ -0,0 +1,145 @@
+// Package config parses and validates admin's environment.
+//
+// Everything required is checked at boot and the process refuses to start
+// without it. A licensing service that cannot sign is worse than one that is
+// down, because it looks healthy.
+package config
+
+import (
+	"fmt"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	AdminMongoURI   string
+	AdminDBName     string
+	ControlMongoURI string
+	ControlDBName   string
+	RedisAddr       string
+	RedisUsername   string
+	RedisPassword   string
+	SigningKey      string
+	PublicURL       string
+	AppLoginURL     string
+	AllowedOrigins  []string
+	TrustProxy      bool
+	Addr            string
+	ReapAfter       time.Duration
+
+	PaddleEnv           string // "sandbox" or "production"
+	PaddleAPIKey        string
+	PaddleWebhookSecret string
+
+	SMTPHost     string
+	SMTPPort     string
+	SMTPFrom     string
+	SMTPUsername string
+	SMTPPassword string
+}
+
+// dbNameFromURI reads the database from a Mongo URI path.
+//
+// Both URIs must name their database inline rather than through a separate
+// variable. Admin talks to two databases; a bare MONGO_DB would be ambiguous
+// about which, and guessing wrong means writing licence fields into the wrong
+// place.
+func dbNameFromURI(raw, which string) (string, error) {
+	u, err := url.Parse(raw)
+	if err != nil {
+		return "", fmt.Errorf("%s is not a valid URI: %w", which, err)
+	}
+	name := strings.TrimPrefix(u.Path, "/")
+	if name == "" {
+		return "", fmt.Errorf("%s must name a database in its path, e.g. mongodb://host:27017/vantage_admin", which)
+	}
+	return name, nil
+}
+
+func Load() (Config, error) {
+	c := Config{
+		AdminMongoURI:   os.Getenv("ADMIN_MONGO_URI"),
+		ControlMongoURI: os.Getenv("CONTROL_MONGO_URI"),
+		RedisAddr:       os.Getenv("REDIS_ADDR"),
+		// Optional: an unauthenticated Redis needs neither. Redis 6+ ACL auth
+		// takes both; a legacy `requirepass` instance takes the password alone
+		// and must leave the username empty.
+		RedisUsername: os.Getenv("REDIS_USERNAME"),
+		RedisPassword: os.Getenv("REDIS_PASSWORD"),
+		SigningKey:    os.Getenv("LICENSE_SIGNING_KEY"),
+		PublicURL:     strings.TrimSuffix(os.Getenv("PUBLIC_URL"), "/"),
+		AppLoginURL:   os.Getenv("APP_LOGIN_URL"),
+		TrustProxy:    strings.EqualFold(os.Getenv("TRUST_PROXY"), "true"),
+		Addr:          ":" + envOr("PORT", "8083"),
+
+		SMTPHost:     os.Getenv("SMTP_HOST"),
+		SMTPPort:     envOr("SMTP_PORT", "587"),
+		SMTPFrom:     os.Getenv("SMTP_FROM"),
+		SMTPUsername: os.Getenv("SMTP_USERNAME"),
+		SMTPPassword: os.Getenv("SMTP_PASSWORD"),
+
+		PaddleEnv:           envOr("PADDLE_ENV", "sandbox"),
+		PaddleAPIKey:        os.Getenv("PADDLE_API_KEY"),
+		PaddleWebhookSecret: os.Getenv("PADDLE_WEBHOOK_SECRET"),
+	}
+
+	var missing []string
+	for name, v := range map[string]string{
+		"ADMIN_MONGO_URI":     c.AdminMongoURI,
+		"CONTROL_MONGO_URI":   c.ControlMongoURI,
+		"REDIS_ADDR":          c.RedisAddr,
+		"LICENSE_SIGNING_KEY": c.SigningKey,
+		"PUBLIC_URL":          c.PublicURL,
+		"ADMIN_ORIGIN":        os.Getenv("ADMIN_ORIGIN"),
+		// An unverified webhook endpoint is one anyone can issue licences
+		// through, so the secret and API key are boot-required.
+		"PADDLE_API_KEY":        c.PaddleAPIKey,
+		"PADDLE_WEBHOOK_SECRET": c.PaddleWebhookSecret,
+	} {
+		if v == "" {
+			missing = append(missing, name)
+		}
+	}
+	if len(missing) > 0 {
+		return Config{}, fmt.Errorf("missing required environment: %s", strings.Join(missing, ", "))
+	}
+
+	var err error
+	if c.AdminDBName, err = dbNameFromURI(c.AdminMongoURI, "ADMIN_MONGO_URI"); err != nil {
+		return Config{}, err
+	}
+	if c.ControlDBName, err = dbNameFromURI(c.ControlMongoURI, "CONTROL_MONGO_URI"); err != nil {
+		return Config{}, err
+	}
+	if c.AdminMongoURI == c.ControlMongoURI {
+		return Config{}, fmt.Errorf("ADMIN_MONGO_URI and CONTROL_MONGO_URI must not be the same database")
+	}
+
+	for _, o := range strings.Split(os.Getenv("ADMIN_ORIGIN"), ",") {
+		if o = strings.TrimSpace(o); o != "" {
+			c.AllowedOrigins = append(c.AllowedOrigins, o)
+		}
+	}
+
+	// Mirrors the control plane's FREE_INSTANCE_REAP_AFTER so notice emails can
+	// name the real deletion date. An unparseable value is refused rather than
+	// silently treated as "off": a typo here would quietly stop every deletion
+	// warning while the control plane still deletes.
+	if v := os.Getenv("FREE_INSTANCE_REAP_AFTER"); v != "" {
+		d, err := time.ParseDuration(v)
+		if err != nil {
+			return Config{}, fmt.Errorf("FREE_INSTANCE_REAP_AFTER %q: %w", v, err)
+		}
+		c.ReapAfter = d
+	}
+	return c, nil
+}
+
+func envOr(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}

admin/internal/db/db.go

@@ -0,0 +1,171 @@
+// Package db holds admin's two MongoDB connections.
+//
+// Admin() is its own database and it owns every collection there. Control() is
+// the control plane's database. Admin's access to it is narrow and lives in
+// exactly two packages: inject writes three licence fields on `instances`, and
+// cloudprov creates and rolls back `instances` and `users` when a customer
+// provisions a cloud instance. Nothing else may write there, and a third write
+// path is a design change rather than a refactor.
+package db
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/config"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+var (
+	adminDB   *mongo.Database
+	controlDB *mongo.Database
+)
+
+func Connect(ctx context.Context, cfg config.Config) error {
+	ac, err := mongo.Connect(options.Client().ApplyURI(cfg.AdminMongoURI))
+	if err != nil {
+		return fmt.Errorf("connect admin mongo: %w", err)
+	}
+	if err := ac.Ping(ctx, nil); err != nil {
+		return fmt.Errorf("ping admin mongo: %w", err)
+	}
+	adminDB = ac.Database(cfg.AdminDBName)
+
+	cc, err := mongo.Connect(options.Client().ApplyURI(cfg.ControlMongoURI))
+	if err != nil {
+		return fmt.Errorf("connect control mongo: %w", err)
+	}
+	if err := cc.Ping(ctx, nil); err != nil {
+		return fmt.Errorf("ping control mongo: %w", err)
+	}
+	controlDB = cc.Database(cfg.ControlDBName)
+
+	// The control plane must already be deployed and migrated. Without the
+	// instances collection, injection would silently create it and write
+	// licence fields into a collection nothing reads.
+	names, err := controlDB.ListCollectionNames(ctx, map[string]any{"name": "instances"})
+	if err != nil {
+		return fmt.Errorf("inspect control database: %w", err)
+	}
+	if len(names) == 0 {
+		return fmt.Errorf("control database %q has no instances collection; deploy and migrate the control plane first", cfg.ControlDBName)
+	}
+	return nil
+}
+
+func Admin(name string) *mongo.Collection   { return adminDB.Collection(name) }
+func Control(name string) *mongo.Collection { return controlDB.Collection(name) }
+
+// ControlDB exposes the control-plane database itself, because shared/provision
+// takes a database rather than a collection.
+//
+// It is used by cloudprov and nothing else. Reach for Control(name) unless you
+// are calling into shared/provision.
+func ControlDB() *mongo.Database { return controlDB }
+
+func Ctx() (context.Context, context.CancelFunc) {
+	return context.WithTimeout(context.Background(), 10*time.Second)
+}
+
+// EnsureIndexes creates admin's unique indexes.
+//
+// These are a correctness property, not an optimisation. In particular
+// admin_instances.instance_id unique is what stops the same self-hosted UUID
+// being linked to two accounts — without it, two customers could both claim one
+// instance and both be issued licences for it.
+func EnsureIndexes(ctx context.Context) error {
+	unique := []struct {
+		coll  string
+		field string
+	}{
+		{"accounts", "account_id"},
+		{"admin_instances", "instance_id"},
+		{"licenses", "license_id"},
+		{"paddle_events", "event_id"},
+		{"staff_users", "email"},
+		{"customer_users", "email"},
+	}
+	for _, u := range unique {
+		if _, err := Admin(u.coll).Indexes().CreateOne(ctx, mongo.IndexModel{
+			Keys:    bson.D{{Key: u.field, Value: 1}},
+			Options: options.Index().SetUnique(true).SetName(u.field + "_unique"),
+		}); err != nil {
+			return fmt.Errorf("index %s.%s: %w", u.coll, u.field, err)
+		}
+	}
+
+	// Sparse: a subscription exists before Paddle assigns an ID, so empty must
+	// not collide with empty.
+	if _, err := Admin("subscriptions").Indexes().CreateOne(ctx, mongo.IndexModel{
+		Keys:    bson.D{{Key: "paddle_subscription_id", Value: 1}},
+		Options: options.Index().SetUnique(true).SetSparse(true).SetName("paddle_subscription_id_unique"),
+	}); err != nil {
+		return fmt.Errorf("index subscriptions.paddle_subscription_id: %w", err)
+	}
+
+	// plans was unique on tier alone until spec 7. Mongo will not replace an
+	// index implicitly, and the old one would refuse the second row of every
+	// tier, so it is dropped by name here. Dropping a missing index is not an
+	// error worth failing boot over — a fresh database has never had it.
+	if err := Admin("plans").Indexes().DropOne(ctx, "tier_unique"); err != nil {
+		log.Printf("index plans.tier_unique: not dropped (%v); expected on a fresh database", err)
+	}
+
+	for _, u := range []struct {
+		coll string
+		keys bson.D
+		name string
+	}{
+		{"plans", bson.D{{Key: "deployment", Value: 1}, {Key: "tier", Value: 1}}, "deployment_tier_unique"},
+		{"catalogue", bson.D{
+			{Key: "deployment", Value: 1}, {Key: "tier", Value: 1}, {Key: "kind", Value: 1},
+			{Key: "limit_key", Value: 1}, {Key: "feature_key", Value: 1},
+		}, "component_unique"},
+		{"entitlements", bson.D{{Key: "instance_id", Value: 1}}, "instance_id_unique"},
+	} {
+		if _, err := Admin(u.coll).Indexes().CreateOne(ctx, mongo.IndexModel{
+			Keys:    u.keys,
+			Options: options.Index().SetUnique(true).SetName(u.name),
+		}); err != nil {
+			return fmt.Errorf("index %s.%s: %w", u.coll, u.name, err)
+		}
+	}
+
+	for _, idx := range []struct {
+		coll string
+		keys bson.D
+	}{
+		{"licenses", bson.D{{Key: "instance_id", Value: 1}, {Key: "issued_at", Value: -1}}},
+		{"admin_instances", bson.D{{Key: "account_id", Value: 1}}},
+		{"admin_audit", bson.D{{Key: "created_at", Value: -1}}},
+	} {
+		if _, err := Admin(idx.coll).Indexes().CreateOne(ctx, mongo.IndexModel{Keys: idx.keys}); err != nil {
+			return fmt.Errorf("index %s: %w", idx.coll, err)
+		}
+	}
+
+	// One person holds at most one user in one instance. This is the property
+	// that makes a grant idempotent-by-refusal rather than silently doubling a
+	// projection, and it mirrors users' own (instance_id, email) uniqueness.
+	if _, err := Admin("instance_members").Indexes().CreateOne(ctx, mongo.IndexModel{
+		Keys: bson.D{{Key: "instance_id", Value: 1}, {Key: "customer_user_id", Value: 1}},
+		Options: options.Index().SetUnique(true).
+			SetName("instance_customer_user_unique"),
+	}); err != nil {
+		return fmt.Errorf("index instance_members.(instance_id,customer_user_id): %w", err)
+	}
+	for _, keys := range []bson.D{
+		{{Key: "account_id", Value: 1}},
+		{{Key: "customer_user_id", Value: 1}},
+	} {
+		if _, err := Admin("instance_members").Indexes().CreateOne(ctx,
+			mongo.IndexModel{Keys: keys}); err != nil {
+			return fmt.Errorf("index instance_members: %w", err)
+		}
+	}
+	return nil
+}

admin/internal/hqsync/hqsync.go

@@ -0,0 +1,116 @@
+// Package hqsync keeps projected control-plane users consistent with the HQ
+// people they were projected from.
+//
+// It is separate from inject on purpose. inject writes exactly three licence
+// fields on `instances` and that narrowness is the reason admin's reach into
+// the control plane is reviewable at all; a password repair pass bolted onto it
+// would quietly turn it into "the package that writes whatever admin wants".
+// This one goes through cloudprov, which is the sanctioned user write path.
+package hqsync
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/cloudprov"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Interval matches inject's reconciler. Fifteen minutes is the worst-case
+// staleness a password change can suffer, which the spec accepts as
+// recoverable.
+const Interval = 15 * time.Minute
+
+// Reconcile compares every projected user's stored hash against the HQ hash it
+// came from, and repairs mismatches.
+//
+// The comparison is on the hash string, not the password: two bcrypt hashes of
+// one password differ by salt, so this repairs by COPYING HQ's hash rather than
+// re-hashing. That is also why propagation copies rather than re-derives.
+func Reconcile(ctx context.Context) (checked, repaired int, err error) {
+	cur, err := db.Admin("customer_users").Find(ctx,
+		bson.M{"password_hash": bson.M{"$nin": bson.A{nil, ""}}})
+	if err != nil {
+		return 0, 0, err
+	}
+	var people []models.CustomerUser
+	if err := cur.All(ctx, &people); err != nil {
+		return 0, 0, err
+	}
+
+	for _, p := range people {
+		projected, err := cloudprov.ProjectedUsers(ctx, p.UserID)
+		if err != nil {
+			log.Printf("hqsync: read projections of %s: %v", p.Email, err)
+			continue
+		}
+		stale := false
+		for _, u := range projected {
+			checked++
+			if u.PasswordHash != p.PasswordHash {
+				stale = true
+			}
+		}
+		if !stale {
+			// Clear a stale failure flag: the instances agree, whatever the
+			// flag says. Nothing reads the flag to decide what to repair.
+			if p.HQSyncFailedAt != nil {
+				_, _ = db.Admin("customer_users").UpdateOne(ctx,
+					bson.M{"user_id": p.UserID},
+					bson.M{"$unset": bson.M{"hq_sync_failed_at": ""}})
+			}
+			continue
+		}
+
+		n, err := cloudprov.SetPasswordHash(ctx, p.UserID, p.PasswordHash)
+		if err != nil {
+			log.Printf("hqsync: repair %s: %v", p.Email, err)
+			continue
+		}
+		repaired += int(n)
+		log.Printf("hqsync: repaired %d projected user(s) for %s", n, p.Email)
+		_, _ = db.Admin("customer_users").UpdateOne(ctx,
+			bson.M{"user_id": p.UserID},
+			bson.M{"$unset": bson.M{"hq_sync_failed_at": ""}})
+	}
+	return checked, repaired, nil
+}
+
+// Start runs once at boot, then on a ticker until ctx is cancelled.
+//
+// The boot pass is for the same reason inject's is: the likeliest moment for a
+// half-applied write is a deploy or a crash, and waiting a full interval to
+// notice means a customer's new password does not work somewhere for fifteen
+// minutes after we already know how to fix it.
+func Start(ctx context.Context) {
+	go func() {
+		runOnce(ctx)
+		t := time.NewTicker(Interval)
+		defer t.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-t.C:
+				runOnce(ctx)
+			}
+		}
+	}()
+}
+
+func runOnce(ctx context.Context) {
+	runCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
+	defer cancel()
+
+	checked, repaired, err := Reconcile(runCtx)
+	if err != nil {
+		log.Printf("hqsync: %v", err)
+		return
+	}
+	if repaired > 0 {
+		log.Printf("hqsync: checked %d projected user(s), repaired %d", checked, repaired)
+	}
+}

admin/internal/inject/inject.go

@@ -0,0 +1,178 @@
+// Package inject writes licences onto control-plane instance documents.
+//
+// This is admin's ONLY write path into the control plane, and it touches exactly
+// three fields on one collection. If this package ever grows a second write
+// target, that is a design change and not a refactor.
+package inject
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+// ReconcileInterval is how often every cloud instance is compared against what
+// admin believes it should hold.
+//
+// This job, not the issuance path, is what guarantees eventual consistency.
+// Injection at issue time is best-effort; this is the backstop.
+const ReconcileInterval = 15 * time.Minute
+
+// Cloud writes the licence onto the control-plane instance document.
+//
+// Idempotent and safe to re-run: it is a single UpdateOne of three fields with
+// no read-modify-write. Retries three times with backoff.
+//
+// The control plane caches licence state for 60 seconds, so this takes effect
+// within a minute with no restart.
+func Cloud(ctx context.Context, lic *models.License) error {
+	set := bson.M{"$set": bson.M{
+		"license_blob":   lic.Blob,
+		"license_tier":   lic.Tier,
+		"license_expiry": lic.ExpiresAt,
+	}}
+
+	var lastErr error
+	for attempt := 1; attempt <= 3; attempt++ {
+		res, err := db.Control("instances").UpdateOne(ctx,
+			bson.M{"instance_id": lic.InstanceID}, set)
+		if err == nil {
+			if res.MatchedCount == 0 {
+				return fmt.Errorf("no control-plane instance %s", lic.InstanceID)
+			}
+			return nil
+		}
+		lastErr = err
+		time.Sleep(time.Duration(attempt) * 2 * time.Second)
+	}
+	return fmt.Errorf("inject after 3 attempts: %w", lastErr)
+}
+
+// Deliver injects and records the outcome without ever failing the caller.
+//
+// A licence that is recorded but not injected is recoverable — the reconciler
+// will fix it within 15 minutes, and staff can see it on the health endpoint.
+// Failing the purchase because one write failed would be worse.
+func Deliver(ctx context.Context, lic *models.License) {
+	if err := Cloud(ctx, lic); err != nil {
+		log.Printf("INJECTION FAILED instance=%s licence=%s: %v", lic.InstanceID, lic.LicenseID, err)
+		now := time.Now().UTC()
+		_, _ = db.Admin("admin_instances").UpdateOne(ctx,
+			bson.M{"instance_id": lic.InstanceID},
+			bson.M{"$set": bson.M{"inject_failed_at": now}})
+		return
+	}
+	_, _ = db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": lic.InstanceID},
+		bson.M{"$unset": bson.M{"inject_failed_at": ""}})
+}
+
+// Reconcile compares every active cloud instance's current licence against the
+// blob actually stored in the control plane, and re-injects on mismatch.
+func Reconcile(ctx context.Context) (checked, repaired int, err error) {
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{
+		"deployment":      license.DeploymentCloud,
+		"status":          models.StatusActive,
+		"current_license": bson.M{"$ne": ""},
+	})
+	if err != nil {
+		return 0, 0, err
+	}
+	var instances []models.Instance
+	if err := cur.All(ctx, &instances); err != nil {
+		return 0, 0, err
+	}
+
+	for _, inst := range instances {
+		checked++
+
+		var lic models.License
+		if err := db.Admin("licenses").FindOne(ctx,
+			bson.M{"license_id": inst.CurrentLicense}).Decode(&lic); err != nil {
+			log.Printf("reconcile: instance %s references unknown licence %s", inst.InstanceID, inst.CurrentLicense)
+			continue
+		}
+
+		var remote sharedmodels.Instance
+		if err := db.Control("instances").FindOne(ctx,
+			bson.M{"instance_id": inst.InstanceID}).Decode(&remote); err != nil {
+			// The control plane's reaper deletes lapsed Free instances. Record
+			// that here rather than re-logging it every fifteen minutes forever,
+			// and so the lifecycle sweep stops emailing about it.
+			if errors.Is(err, mongo.ErrNoDocuments) {
+				if _, uErr := db.Admin("admin_instances").UpdateOne(ctx,
+					bson.M{"instance_id": inst.InstanceID},
+					bson.M{"$set": bson.M{"status": models.StatusDeleted}}); uErr != nil {
+					log.Printf("reconcile: mark %s deleted: %v", inst.InstanceID, uErr)
+				} else {
+					log.Printf("reconcile: instance %s is gone from the control plane; marked deleted", inst.InstanceID)
+				}
+				continue
+			}
+			log.Printf("reconcile: no control-plane instance %s: %v", inst.InstanceID, err)
+			continue
+		}
+
+		if remote.LicenseBlob == lic.Blob {
+			continue
+		}
+
+		log.Printf("reconcile: repairing instance %s (licence %s)", inst.InstanceID, lic.LicenseID)
+		if err := Cloud(ctx, &lic); err != nil {
+			log.Printf("reconcile: repair failed for %s: %v", inst.InstanceID, err)
+			continue
+		}
+		repaired++
+		_, _ = db.Admin("admin_instances").UpdateOne(ctx,
+			bson.M{"instance_id": inst.InstanceID},
+			bson.M{"$unset": bson.M{"inject_failed_at": ""}})
+	}
+	return checked, repaired, nil
+}
+
+// StartReconciler reconciles once at boot, then on a ticker until ctx is
+// cancelled.
+//
+// The pass at boot matters: injection failures are most likely around a deploy
+// or a crash, and waiting a full interval to notice would leave a paying
+// customer read-only for that long. It also means a restart is a supported way
+// to force reconciliation.
+func StartReconciler(ctx context.Context) {
+	go func() {
+		runOnce(ctx)
+
+		t := time.NewTicker(ReconcileInterval)
+		defer t.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-t.C:
+				runOnce(ctx)
+			}
+		}
+	}()
+}
+
+func runOnce(ctx context.Context) {
+	runCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
+	defer cancel()
+
+	checked, repaired, err := Reconcile(runCtx)
+	if err != nil {
+		log.Printf("reconcile: %v", err)
+		return
+	}
+	if repaired > 0 {
+		log.Printf("reconcile: checked %d, repaired %d", checked, repaired)
+	}
+}

admin/internal/licensing/issue.go

@@ -0,0 +1,214 @@
+// Package licensing issues licences. It is the only place that signs.
+package licensing
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/catalogue"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+var (
+	ErrUnknownTier        = errors.New("unknown tier")
+	ErrDeploymentMismatch = errors.New("that plan is not available for this deployment type")
+	ErrFreeLimit          = errors.New("this account already has a Free instance of that deployment type")
+	ErrUnknownInstance    = errors.New("instance not found")
+)
+
+type IssueInput struct {
+	InstanceID string
+	Tier       string
+	Term       string    // "monthly" or "annual"; ignored when ExpiresAt is set
+	ExpiresAt  time.Time // explicit expiry, used by relink to preserve the remaining term
+	Reason     string
+	IssuedBy   string // staff email, "system", or "paddle:<event id>"
+}
+
+// signingKey is set once at boot from LICENSE_SIGNING_KEY.
+var signingKey string
+
+func SetSigningKey(k string) { signingKey = k }
+
+// Issue signs a licence, records it, supersedes its predecessor and updates the
+// instance.
+//
+// It does NOT deliver. Recording and delivery are deliberately separate and
+// ordered: a licence recorded but not delivered is recoverable, because the
+// customer can download it. A licence delivered but not recorded is a support
+// mystery with no paper trail. Callers deliver after this returns.
+func Issue(ctx context.Context, in IssueInput) (*models.License, error) {
+	if signingKey == "" {
+		return nil, errors.New("no signing key configured")
+	}
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": in.InstanceID}).Decode(&inst); err != nil {
+		return nil, ErrUnknownInstance
+	}
+
+	// The plan is looked up by the INSTANCE's deployment, not by a caller's
+	// guess. That is what makes the deployment comparison below a consistency
+	// check rather than the thing that decides which plan applies.
+	plan, err := models.GetPlan(ctx, inst.Deployment, in.Tier)
+	if err != nil {
+		return nil, ErrUnknownTier
+	}
+
+	// This single comparison is what makes Free cloud-only. Free's plan is
+	// deployment "cloud", so it can never be issued against a self-hosted
+	// instance, and verification on the instance would reject it anyway.
+	if plan.Deployment != inst.Deployment {
+		return nil, fmt.Errorf("%w: %s is %s only", ErrDeploymentMismatch, plan.Name, plan.Deployment)
+	}
+
+	if plan.Tier == license.TierFree {
+		if err := checkFreeLimit(ctx, inst.AccountID, inst.Deployment, inst.InstanceID); err != nil {
+			return nil, err
+		}
+	}
+
+	// What this licence grants comes from the instance's entitlement, not from
+	// the plan. The plan is only the base.
+	//
+	// An instance with no entitlement gets the plan's base, which covers staff
+	// manual issuance and anything predating the backfill. Falling back is
+	// deliberate: refusing here would make a missing row an outage rather than a
+	// default.
+	limits, features := plan.BaseLimits, []string(plan.BaseFeatures.OrEmpty())
+	ent, entErr := models.GetEntitlement(ctx, inst.InstanceID)
+	switch {
+	case entErr == nil:
+		// Granted, never Desired. A configuration nobody has paid for must not
+		// reach a signed payload.
+		limits, features, err = catalogue.Resolve(ctx, plan, ent.Granted)
+		if err != nil {
+			return nil, fmt.Errorf("resolve entitlement: %w", err)
+		}
+	case errors.Is(entErr, models.ErrNoEntitlement):
+		log.Printf("licensing: instance %s has no entitlement; issuing plan base",
+			inst.InstanceID)
+	default:
+		return nil, fmt.Errorf("read entitlement: %w", entErr)
+	}
+
+	now := time.Now().UTC()
+	expires := in.ExpiresAt
+	if expires.IsZero() {
+		switch in.Term {
+		case "monthly":
+			expires = now.AddDate(0, 1, 0).Add(models.GracePeriod)
+		case "annual", "":
+			expires = now.AddDate(1, 0, 0).Add(models.GracePeriod)
+		default:
+			return nil, fmt.Errorf("unknown term %q", in.Term)
+		}
+	}
+
+	payload := license.License{
+		ID:           uuid.NewString(),
+		InstanceID:   inst.InstanceID,
+		AccountID:    inst.AccountID,
+		InstanceName: inst.Name,
+		Tier:         plan.Tier,
+		Deployment:   plan.Deployment,
+		IssuedAt:     now,
+		ExpiresAt:    expires,
+		// Snapshotted, not referenced: editing a plan or an entitlement tomorrow
+		// must not change what this licence grants.
+		Limits:       limits,
+		Features:     features,
+		SupportLevel: plan.SupportLevel,
+	}
+
+	blob, err := license.Sign(payload, signingKey)
+	if err != nil {
+		return nil, fmt.Errorf("sign: %w", err)
+	}
+
+	rec := models.License{
+		LicenseID:  payload.ID,
+		InstanceID: inst.InstanceID,
+		AccountID:  inst.AccountID,
+		Tier:       plan.Tier,
+		Deployment: plan.Deployment,
+		Limits:     limits,
+		Features:   models.Features(features).OrEmpty(),
+		IssuedAt:   now,
+		ExpiresAt:  expires,
+		Blob:       blob,
+		IssuedBy:   in.IssuedBy,
+		Reason:     in.Reason,
+	}
+	if _, err := db.Admin("licenses").InsertOne(ctx, rec); err != nil {
+		return nil, fmt.Errorf("record licence: %w", err)
+	}
+
+	// Supersede rather than delete. The history is the support tool.
+	if inst.CurrentLicense != "" {
+		if _, err := db.Admin("licenses").UpdateOne(ctx,
+			bson.M{"license_id": inst.CurrentLicense},
+			bson.M{"$set": bson.M{"superseded_by": rec.LicenseID}}); err != nil {
+			return nil, fmt.Errorf("supersede previous licence: %w", err)
+		}
+	}
+
+	set := bson.M{
+		"current_license": rec.LicenseID,
+		"tier":            plan.Tier,
+		"status":          models.StatusActive,
+	}
+	if in.Reason == models.ReasonRenewal {
+		set["relink_count"] = 0 // the cap is per term
+	}
+	if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": inst.InstanceID}, bson.M{"$set": set}); err != nil {
+		return nil, fmt.Errorf("update instance: %w", err)
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor:     in.IssuedBy,
+		Action:    "license.issued",
+		AccountID: inst.AccountID,
+		Target:    inst.InstanceID,
+		Detail: fmt.Sprintf("tier=%s reason=%s expires=%s licence=%s",
+			plan.Tier, in.Reason, expires.Format(time.RFC3339), rec.LicenseID),
+	})
+
+	return &rec, nil
+}
+
+// checkFreeLimit enforces one Free instance per account PER DEPLOYMENT.
+//
+// It used to be one per account, which was sufficient while Free existed only on
+// cloud. With a self-hosted Free plan, an account-wide count would refuse a
+// self-hosted Free instance to anyone holding a cloud one, and tell them about a
+// limit they have not reached.
+//
+// Cancelled instances do not count: a customer who cancelled their Free instance
+// is allowed another one.
+func checkFreeLimit(ctx context.Context, accountID, deployment, exceptInstanceID string) error {
+	n, err := db.Admin("admin_instances").CountDocuments(ctx, bson.M{
+		"account_id":  accountID,
+		"deployment":  deployment,
+		"tier":        license.TierFree,
+		"status":      bson.M{"$ne": models.StatusCancelled},
+		"instance_id": bson.M{"$ne": exceptInstanceID},
+	})
+	if err != nil {
+		return err
+	}
+	if n > 0 {
+		return ErrFreeLimit
+	}
+	return nil
+}

admin/internal/licensing/link.go

@@ -0,0 +1,177 @@
+package licensing
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/audit"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/paddle"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+var (
+	ErrBadUUID       = errors.New("that does not look like an instance ID")
+	ErrAlreadyLinked = errors.New("that instance ID is already linked to an account")
+	ErrRelinkLimit   = errors.New("relink limit reached for this term; contact support")
+)
+
+// LinkInstance attaches a self-hosted instance UUID to an account.
+//
+// The duplicate error deliberately does not say WHICH account holds it. It is a
+// small enumeration surface, but there is no reason to leave it open.
+func LinkInstance(ctx context.Context, accountID, instanceID, name string) (*models.Instance, error) {
+	if _, err := uuid.Parse(instanceID); err != nil {
+		return nil, ErrBadUUID
+	}
+
+	// A self-hosted UUID must not collide with a cloud instance either.
+	if n, err := db.Control("instances").CountDocuments(ctx, bson.M{"instance_id": instanceID}); err == nil && n > 0 {
+		return nil, ErrAlreadyLinked
+	}
+
+	inst := models.Instance{
+		InstanceID: instanceID,
+		AccountID:  accountID,
+		Name:       name,
+		Deployment: license.DeploymentSelfHosted,
+		Status:     models.StatusActive,
+		CreatedAt:  time.Now().UTC(),
+	}
+	if _, err := db.Admin("admin_instances").InsertOne(ctx, inst); err != nil {
+		if mongo.IsDuplicateKeyError(err) {
+			// The unique index is what actually prevents two accounts owning
+			// one instance. The check above is a nicety; this is the guarantee.
+			return nil, ErrAlreadyLinked
+		}
+		return nil, err
+	}
+
+	audit.Write(ctx, models.AuditEntry{
+		Actor: accountID, Action: "instance.linked", AccountID: accountID, Target: instanceID})
+	return &inst, nil
+}
+
+// RepointSubscriptions follows an instance identity rewrite: it moves every
+// subscription row from the old id to the new one, then rewrites Paddle's copy
+// of custom_data so future webhooks decode to the new id.
+//
+// The local rewrite is returned as an error — issuance reads the subscription
+// back, so a half-moved row is worth failing on. The Paddle patch only logs: the
+// customer must not be blocked from linking or relinking by an outbound API
+// failure, and the caller has already recorded the old id in
+// previous_instance_ids, which is what makes the webhook path correct whether or
+// not the patch lands.
+func RepointSubscriptions(ctx context.Context, oldID, newID, accountID string) error {
+	if _, err := db.Admin("subscriptions").UpdateMany(ctx,
+		bson.M{"instance_id": oldID},
+		bson.M{"$set": bson.M{"instance_id": newID}}); err != nil {
+		return fmt.Errorf("repoint %s -> %s: %w", oldID, newID, err)
+	}
+
+	cur, err := db.Admin("subscriptions").Find(ctx, bson.M{"instance_id": newID})
+	if err != nil {
+		log.Printf("repoint %s -> %s: read subscriptions: %v", oldID, newID, err)
+		return nil
+	}
+	var subs []models.Subscription
+	if err := cur.All(ctx, &subs); err != nil {
+		log.Printf("repoint %s -> %s: decode subscriptions: %v", oldID, newID, err)
+		return nil
+	}
+	for _, s := range subs {
+		if s.PaddleSubscriptionID == "" {
+			continue
+		}
+		// Paddle replaces the whole custom_data object on a PATCH, so account_id
+		// is sent alongside rather than dropped.
+		if err := paddle.Get().UpdateSubscriptionCustomData(ctx, s.PaddleSubscriptionID,
+			map[string]string{"account_id": accountID, "instance_id": newID}); err != nil {
+			log.Printf("repoint %s -> %s: patch custom_data on %s: %v",
+				oldID, newID, s.PaddleSubscriptionID, err)
+		}
+	}
+	return nil
+}
+
+// Relink moves a licence to a rebuilt server's new UUID.
+//
+// The replacement covers the REMAINING term, not a fresh one — relinking is not
+// a way to extend a subscription.
+//
+// The old licence is not revoked, because offline verification has no
+// revocation. It simply no longer matches any UUID the customer controls, and
+// its binding stops it working on another machine anyway.
+func Relink(ctx context.Context, accountID, oldID, newID string, staff bool) (*models.License, error) {
+	if _, err := uuid.Parse(newID); err != nil {
+		return nil, ErrBadUUID
+	}
+
+	var inst models.Instance
+	if err := db.Admin("admin_instances").FindOne(ctx,
+		bson.M{"instance_id": oldID, "account_id": accountID}).Decode(&inst); err != nil {
+		return nil, ErrUnknownInstance
+	}
+
+	// The cap is a signal, not a defence. Its job is to put a human in front of
+	// the fourth attempt, so staff bypass it.
+	if !staff && inst.RelinkCount >= models.MaxRelinksPerTerm {
+		return nil, ErrRelinkLimit
+	}
+
+	if n, err := db.Admin("admin_instances").CountDocuments(ctx, bson.M{"instance_id": newID}); err == nil && n > 0 {
+		return nil, ErrAlreadyLinked
+	}
+
+	// Preserve the remaining term from the current licence.
+	remaining := time.Now().UTC().Add(models.GracePeriod)
+	var current models.License
+	if err := db.Admin("licenses").FindOne(ctx,
+		bson.M{"license_id": inst.CurrentLicense}).Decode(&current); err == nil {
+		remaining = current.ExpiresAt
+	}
+
+	if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+		bson.M{"instance_id": oldID},
+		bson.M{
+			"$set":      bson.M{"instance_id": newID},
+			"$inc":      bson.M{"relink_count": 1},
+			"$addToSet": bson.M{"previous_instance_ids": oldID},
+		}); err != nil {
+		if mongo.IsDuplicateKeyError(err) {
+			return nil, ErrAlreadyLinked
+		}
+		return nil, fmt.Errorf("relink: %w", err)
+	}
+
+	// A relink rewrites the instance's identity exactly as a placeholder claim
+	// does, so the same two things have to follow it: the subscription rows that
+	// named the old id, and Paddle's own copy of custom_data. Without this a
+	// renewal after a relink cannot find its instance and the term never extends.
+	if err := RepointSubscriptions(ctx, oldID, newID, accountID); err != nil {
+		return nil, err
+	}
+
+	actor := accountID
+	if staff {
+		actor = "staff"
+	}
+	audit.Write(ctx, models.AuditEntry{
+		Actor: actor, Action: "instance.relinked", AccountID: accountID,
+		Target: newID, Detail: "was " + oldID})
+
+	return Issue(ctx, IssueInput{
+		InstanceID: newID,
+		Tier:       inst.Tier,
+		ExpiresAt:  remaining,
+		Reason:     models.ReasonRelink,
+		IssuedBy:   actor,
+	})
+}

admin/internal/lifecycle/lifecycle.go

@@ -0,0 +1,255 @@
+// Package lifecycle marks lapsed Free instances and sends the renewal notices.
+//
+// It sends; it never deletes. Deletion belongs to the control plane, which is
+// the only service that knows what an instance is made of. The two are kept
+// apart on purpose: a bug here sends a wrong email, a bug there loses data.
+package lifecycle
+
+import (
+	"context"
+	"log"
+	"slices"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/mail"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/models"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Interval is how often the sweep runs. Hourly is far finer than the daily
+// granularity of the notices, which means a notice goes out within an hour of
+// becoming due rather than up to a day late.
+const Interval = time.Hour
+
+// Notice keys, recorded on the instance so a restart cannot re-send one.
+const (
+	noticeExpiring = "expiring"
+	noticeExpired  = "expired"
+	noticeDelete7  = "delete_7"
+	noticeDelete1  = "delete_1"
+)
+
+// portalURL is the customer portal address used in notice emails.
+var portalURL string
+
+// SetPortalURL is called once at boot.
+func SetPortalURL(v string) { portalURL = v }
+
+// reapAfter mirrors the control plane's FREE_INSTANCE_REAP_AFTER so the emails
+// can name the real deletion date. Zero means the reaper is off, and the
+// deletion notices are then suppressed — promising a deletion that will never
+// happen would be a lie, and a scarier one than saying nothing.
+var reapAfter time.Duration
+
+// Run performs one sweep: mark lapsed instances, then send whatever notices are
+// due. Errors on one instance never stop the others.
+func Run(ctx context.Context) error {
+	now := time.Now().UTC()
+
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{
+		"deployment": license.DeploymentCloud,
+		"tier":       license.TierFree,
+		"status":     bson.M{"$in": []string{models.StatusActive, models.StatusLapsed}},
+	})
+	if err != nil {
+		return err
+	}
+	var instances []models.Instance
+	if err := cur.All(ctx, &instances); err != nil {
+		return err
+	}
+
+	for _, inst := range instances {
+		var lic models.License
+		if err := db.Admin("licenses").FindOne(ctx,
+			bson.M{"license_id": inst.CurrentLicense}).Decode(&lic); err != nil {
+			continue // no licence yet; nothing to expire
+		}
+
+		// Flip active -> lapsed once the licence is past its expiry.
+		if now.After(lic.ExpiresAt) && inst.Status == models.StatusActive {
+			if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+				bson.M{"instance_id": inst.InstanceID},
+				bson.M{"$set": bson.M{"status": models.StatusLapsed}}); err != nil {
+				log.Printf("lifecycle: mark %s lapsed: %v", inst.InstanceID, err)
+			}
+		}
+
+		if lic.ExpiresAt.Add(reapAfter).Before(now) {
+			if _, err := db.Admin("admin_instances").DeleteOne(ctx, bson.M{"instance_id": inst.InstanceID}); err != nil {
+				log.Printf("lifecycle: delete instance %s: %v", inst.InstanceID, err)
+			}
+
+			if _, err := db.Admin("licenses").DeleteMany(ctx, bson.M{"instance_id": inst.InstanceID}); err != nil {
+				log.Printf("lifecycle: delete licenses for instance %s: %v", inst.InstanceID, err)
+			}
+		}
+
+		due := dueNotice(now, lic.ExpiresAt, inst.NoticesSent)
+		if due == "" {
+			continue
+		}
+		if err := sendNotice(ctx, inst, lic, due); err != nil {
+			log.Printf("lifecycle: notice %s for %s: %v", due, inst.InstanceID, err)
+			continue
+		}
+		if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+			bson.M{"instance_id": inst.InstanceID},
+			bson.M{"$addToSet": bson.M{"notices_sent": due}}); err != nil {
+			log.Printf("lifecycle: record notice %s for %s: %v", due, inst.InstanceID, err)
+		}
+	}
+	return nil
+}
+
+// dueNotice returns the most urgent unsent notice, or "".
+//
+// Most urgent first, so an instance that was missed for a week — because admin
+// was down — sends the one that matters now rather than working through a
+// backlog of stale warnings.
+func dueNotice(now, expires time.Time, sent []string) string {
+	deleteOn := expires.Add(reapAfter)
+
+	if reapAfter > 0 {
+		if now.After(deleteOn.Add(-24*time.Hour)) && !slices.Contains(sent, noticeDelete1) {
+			return noticeDelete1
+		}
+		if now.After(deleteOn.Add(-7*24*time.Hour)) && !slices.Contains(sent, noticeDelete7) {
+			return noticeDelete7
+		}
+	}
+	if now.After(expires) && !slices.Contains(sent, noticeExpired) {
+		return noticeExpired
+	}
+	if now.After(expires.Add(-models.RenewWindow)) && !slices.Contains(sent, noticeExpiring) {
+		return noticeExpiring
+	}
+	return ""
+}
+
+func sendNotice(ctx context.Context, inst models.Instance, lic models.License, key string) error {
+	if !mail.Enabled() {
+		return nil
+	}
+	var acct models.Account
+	if err := db.Admin("accounts").FindOne(ctx,
+		bson.M{"account_id": inst.AccountID}).Decode(&acct); err != nil {
+		return err
+	}
+	to := acct.BillingEmail
+	deleteOn := lic.ExpiresAt.Add(reapAfter)
+
+	switch key {
+	case noticeExpiring:
+		return mail.Default.SendExpiring(to, inst.Name, portalURL, lic.ExpiresAt)
+	case noticeExpired:
+		return mail.Default.SendExpired(to, inst.Name, portalURL, deleteOn)
+	case noticeDelete7:
+		return mail.Default.SendDeletionWarning(to, inst.Name, portalURL, deleteOn, 7)
+	case noticeDelete1:
+		return mail.Default.SendDeletionWarning(to, inst.Name, portalURL, deleteOn, 1)
+	}
+	return nil
+}
+
+// Start runs the sweep on a ticker until ctx is cancelled.
+//
+// reapAfterDur must match the control plane's FREE_INSTANCE_REAP_AFTER. If they
+// disagree, the emails name a date the reaper does not honour — so they are
+// documented as a pair in CLAUDE.md and set together in the compose file.
+func Start(ctx context.Context, reapAfterDur time.Duration) {
+	reapAfter = reapAfterDur
+	go func() {
+		runOnce(ctx)
+		t := time.NewTicker(Interval)
+		defer t.Stop()
+		for {
+			select {
+			case <-ctx.Done():
+				return
+			case <-t.C:
+				runOnce(ctx)
+			}
+		}
+	}()
+}
+
+func runOnce(ctx context.Context) {
+	runCtx, cancel := context.WithTimeout(ctx, 5*time.Minute)
+	defer cancel()
+	if err := Run(runCtx); err != nil {
+		log.Printf("lifecycle: %v", err)
+	}
+	sweepAwaitingLink(runCtx)
+}
+
+// Awaiting-link reminder keys.
+const (
+	noticeLink24 = "link_24"
+	noticeLink72 = "link_72"
+)
+
+// sweepAwaitingLink chases self-hosted instances that were paid for but never
+// linked: the subscription exists, the instance is still a placeholder. It
+// emails a reminder at 24h and again at 72h. The staff dashboard already flags
+// 48h; this is the active chasing on top of that. It never issues or deletes.
+func sweepAwaitingLink(ctx context.Context) {
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{
+		"deployment":  license.DeploymentSelfHosted,
+		"placeholder": true,
+		"status":      models.StatusAwaitingLink,
+	})
+	if err != nil {
+		return
+	}
+	var instances []models.Instance
+	if err := cur.All(ctx, &instances); err != nil {
+		return
+	}
+	now := time.Now().UTC()
+	for _, inst := range instances {
+		// Only chase placeholders a customer has actually paid for.
+		n, err := db.Admin("subscriptions").CountDocuments(ctx,
+			bson.M{"instance_id": inst.InstanceID, "status": models.SubActive})
+		if err != nil || n == 0 {
+			continue
+		}
+		if !mail.Enabled() {
+			continue
+		}
+		to := accountEmail(ctx, inst.AccountID)
+		if to == "" {
+			continue
+		}
+		age := now.Sub(inst.CreatedAt)
+		var due string
+		if age > 72*time.Hour && !slices.Contains(inst.NoticesSent, noticeLink72) {
+			due = noticeLink72
+		} else if age > 24*time.Hour && !slices.Contains(inst.NoticesSent, noticeLink24) {
+			due = noticeLink24
+		}
+		if due == "" {
+			continue
+		}
+		if err := mail.Default.SendLinkReminder(to, inst.Name); err != nil {
+			log.Printf("lifecycle: link reminder %s for %s: %v", due, inst.InstanceID, err)
+			continue
+		}
+		if _, err := db.Admin("admin_instances").UpdateOne(ctx,
+			bson.M{"instance_id": inst.InstanceID},
+			bson.M{"$addToSet": bson.M{"notices_sent": due}}); err != nil {
+			log.Printf("lifecycle: record link notice %s for %s: %v", due, inst.InstanceID, err)
+		}
+	}
+}
+
+func accountEmail(ctx context.Context, accountID string) string {
+	var acct models.Account
+	if err := db.Admin("accounts").FindOne(ctx,
+		bson.M{"account_id": accountID}).Decode(&acct); err != nil {
+		return ""
+	}
+	return acct.BillingEmail
+}

admin/internal/mail/mail.go

@@ -0,0 +1,19 @@
+// Package mail holds admin's configured email sender.
+//
+// The transport, the templates and the look all live in shared/mail, which the
+// control plane and sitesvc use too — this package exists only so that admin's
+// mail configuration is a boot-time singleton like licensing's signing key,
+// paddle's client and auth's Redis handle, rather than a value threaded through
+// api, auth, billing and lifecycle.
+package mail
+
+import "gitea.hostxtra.co.uk/mrhid6/vantage/shared/mail"
+
+// Default is admin's sender. Set once by main; read everywhere else.
+var Default mail.Sender
+
+func Init(s mail.Sender) { Default = s }
+
+// Enabled reports whether SMTP is configured. Callers check it to skip a send
+// politely rather than logging a failure per message.
+func Enabled() bool { return Default.Enabled() }

admin/internal/models/backfill.go

@@ -0,0 +1,369 @@
+package models
+
+import (
+	"context"
+	"errors"
+	"log"
+	"strings"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	sharedmodels "gitea.hostxtra.co.uk/mrhid6/vantage/shared/models"
+	"github.com/google/uuid"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+// MigrateLegacyPlans re-keys the pre-spec-7 plan rows and MUST run before
+// SeedPlans.
+//
+// The original three rows were keyed on tier alone: (cloud,free),
+// (cloud,professional) and a self_hosted TIER row. Spec 7 re-keys on
+// (deployment, tier), makes self_hosted a deployment rather than a tier, and
+// renames limits/features to base_limits/base_features.
+//
+// Ordering is the whole point. SeedPlans inserts a fresh (self_hosted,
+// professional) row; if the legacy self_hosted row is only renamed afterwards it
+// collides with that seed on deployment_tier_unique. Running here, before the
+// seed, the rename lands first and the seed then no-ops on it.
+//
+// It is idempotent and self-healing: on a database where a previous boot already
+// seeded (self_hosted, professional) before crashing, the legacy row can no
+// longer be renamed onto it, so the legacy row is dropped instead — its
+// instances are re-tiered and re-entitled from the surviving professional row.
+func MigrateLegacyPlans(ctx context.Context) error {
+	// Legacy cloud rows may predate the deployment field entirely.
+	if _, err := db.Admin("plans").UpdateMany(ctx,
+		bson.M{"deployment": bson.M{"$exists": false},
+			"tier": bson.M{"$in": bson.A{license.TierFree, license.TierProfessional}}},
+		bson.M{"$set": bson.M{"deployment": license.DeploymentCloud}}); err != nil {
+		return err
+	}
+
+	// The legacy self_hosted TIER row becomes self-hosted Professional. If that
+	// target already exists (a prior partial boot seeded it), drop the legacy row
+	// rather than colliding — the seeded row carries the same professional base.
+	var legacy Plan
+	err := db.Admin("plans").FindOne(ctx, bson.M{"tier": license.TierSelfHosted}).Decode(&legacy)
+	switch {
+	case err == nil:
+		targetErr := db.Admin("plans").FindOne(ctx,
+			bson.M{"deployment": license.DeploymentSelfHosted, "tier": license.TierProfessional}).Err()
+		if targetErr == nil {
+			if _, err := db.Admin("plans").DeleteOne(ctx, bson.M{"_id": legacy.ID}); err != nil {
+				return err
+			}
+			log.Printf("backfill: dropped legacy self_hosted plan row; (self_hosted, professional) already present")
+		} else if errors.Is(targetErr, mongo.ErrNoDocuments) {
+			if _, err := db.Admin("plans").UpdateOne(ctx,
+				bson.M{"_id": legacy.ID},
+				bson.M{"$set": bson.M{
+					"deployment": license.DeploymentSelfHosted,
+					"tier":       license.TierProfessional,
+					"name":       "Professional",
+				}}); err != nil {
+				return err
+			}
+			log.Printf("backfill: re-keyed legacy self_hosted plan to (self_hosted, professional)")
+		} else {
+			return targetErr
+		}
+	case errors.Is(err, mongo.ErrNoDocuments):
+		// No legacy row; a fresh database or an already-migrated one.
+	default:
+		return err
+	}
+
+	// limits/features become base_limits/base_features on any row still carrying
+	// the old names.
+	if _, err := db.Admin("plans").UpdateMany(ctx,
+		bson.M{"limits": bson.M{"$exists": true}},
+		bson.M{"$rename": bson.M{"limits": "base_limits", "features": "base_features"}}); err != nil {
+		return err
+	}
+
+	// Support level is new, so nothing has one. Fill from the seed table rather
+	// than guessing: a plan row a human edited keeps every other field.
+	for _, deployment := range license.Deployments() {
+		for _, tier := range license.Tiers() {
+			p, ok := license.PlanFor(deployment, tier)
+			if !ok {
+				continue
+			}
+			if _, err := db.Admin("plans").UpdateOne(ctx,
+				bson.M{"deployment": deployment, "tier": tier,
+					"support_level": bson.M{"$in": bson.A{nil, ""}}},
+				bson.M{"$set": bson.M{"support_level": p.SupportLevel}}); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// Backfill brings pre-phase-3 data up to the membership model.
+//
+// It runs on every boot and is idempotent by construction: both passes filter
+// on the absence of what they write. There is no migrations collection in
+// admin, and adding one for two `$exists: false` queries would be more
+// machinery than the job deserves.
+//
+// It lives in models rather than db for the same reason SeedPlans does: db is
+// the connection layer and importing models there is an import cycle.
+func Backfill(ctx context.Context) error {
+	// Pass 1: every existing customer_user created their own account, so they
+	// are all owners. A row with no account_role would otherwise be able to do
+	// nothing at all once the guards land — including managing the account it
+	// created.
+	res, err := db.Admin("customer_users").UpdateMany(ctx,
+		bson.M{"account_role": bson.M{"$exists": false}},
+		bson.M{"$set": bson.M{"account_role": AccountRoleOwner}})
+	if err != nil {
+		return err
+	}
+	if res.ModifiedCount > 0 {
+		log.Printf("backfill: set account_role=owner on %d customer_users", res.ModifiedCount)
+	}
+
+	// Pass 2: phase 2 created cloud instances and their owners without an
+	// instance_members row, because the collection did not exist. Reconstruct
+	// one per instance from the control-plane owner it actually created.
+	cur, err := db.Admin("admin_instances").Find(ctx, bson.M{
+		"deployment": license.DeploymentCloud,
+		"status":     bson.M{"$ne": StatusDeleted},
+	})
+	if err != nil {
+		return err
+	}
+	var instances []Instance
+	if err := cur.All(ctx, &instances); err != nil {
+		return err
+	}
+
+	created := 0
+	for _, inst := range instances {
+		n, err := db.Admin("instance_members").CountDocuments(ctx,
+			bson.M{"instance_id": inst.InstanceID})
+		if err != nil {
+			return err
+		}
+		if n > 0 {
+			continue
+		}
+
+		// Only an hq-sourced owner can be reconstructed: a control-plane owner
+		// with no hq_user_id was created inside the instance and belongs to
+		// nobody on this side. Leaving it unrecorded is correct.
+		var owner sharedmodels.User
+		err = db.Control("users").FindOne(ctx, bson.M{
+			"instance_id": inst.InstanceID,
+			"role":        sharedmodels.RoleOwner,
+			"hq_user_id":  bson.M{"$nin": bson.A{nil, ""}},
+		}).Decode(&owner)
+		if err != nil {
+			if err != mongo.ErrNoDocuments {
+				return err
+			}
+			log.Printf("backfill: instance %s has no hq-sourced owner; left unrecorded", inst.InstanceID)
+			continue
+		}
+
+		if _, err := db.Admin("instance_members").InsertOne(ctx, InstanceMember{
+			MemberID:       uuid.NewString(),
+			AccountID:      inst.AccountID,
+			InstanceID:     inst.InstanceID,
+			CustomerUserID: owner.HQUserID,
+			ControlUserID:  owner.UserID,
+			Role:           sharedmodels.RoleOwner,
+			Email:          owner.Email,
+			CreatedAt:      time.Now().UTC(),
+		}); err != nil {
+			return err
+		}
+		created++
+	}
+	if created > 0 {
+		log.Printf("backfill: recorded %d pre-existing instance owners", created)
+	}
+
+	// Pass 3 (the plan re-key) now runs in MigrateLegacyPlans, called from main
+	// BEFORE SeedPlans. It has to: SeedPlans inserts a fresh
+	// (self_hosted, professional) row, and if the legacy self_hosted TIER row is
+	// only renamed afterwards it collides with that seed on deployment_tier_unique.
+
+	// Pass 4: instances carrying the self_hosted TIER move to Professional.
+	// Their deployment already says self_hosted, so only the tier is wrong.
+	res, err = db.Admin("admin_instances").UpdateMany(ctx,
+		bson.M{"tier": license.TierSelfHosted},
+		bson.M{"$set": bson.M{"tier": license.TierProfessional}})
+	if err != nil {
+		return err
+	}
+	if res.ModifiedCount > 0 {
+		log.Printf("backfill: re-tiered %d self-hosted instances to professional", res.ModifiedCount)
+	}
+
+	// Pass 5: give every instance an entitlement, reconstructed from its current
+	// licence. Filtering on the absence of a row is what makes this idempotent,
+	// and it means an entitlement a customer has since edited is never
+	// overwritten by a stale licence.
+	if err := backfillEntitlements(ctx); err != nil {
+		return err
+	}
+
+	// Pass 6: instances whose identity was rewritten before previous_instance_ids
+	// existed carry no trail, and Paddle's custom_data still names the id they
+	// were rewritten FROM — so their next webhook resolves to nothing. Both
+	// rewrites wrote an audit entry naming the old id, which is the only surviving
+	// record of it, so reconstruct the trail from those.
+	if err := backfillInstanceIDHistory(ctx); err != nil {
+		return err
+	}
+	return nil
+}
+
+// backfillInstanceIDHistory rebuilds previous_instance_ids from the audit entries
+// the two identity rewrites leave behind: a placeholder claim
+// ("instance.placeholder_linked", detail "from placeholder <id>") and a relink
+// ("instance.relinked", detail "was <id>").
+//
+// $addToSet is what makes it idempotent, and it also means a chain of relinks
+// accumulates rather than the last one winning. Entries are walked NEWEST first,
+// matching on the current id or an already-recovered one: an instance relinked
+// A→B→C answers to neither A nor B by the time this runs, so the C entry has to
+// record B before the B entry has anything to attach A to.
+func backfillInstanceIDHistory(ctx context.Context) error {
+	prefixes := map[string]string{
+		"instance.placeholder_linked": "from placeholder ",
+		"instance.relinked":           "was ",
+	}
+	actions := make(bson.A, 0, len(prefixes))
+	for action := range prefixes {
+		actions = append(actions, action)
+	}
+
+	cur, err := db.Admin("admin_audit").Find(ctx,
+		bson.M{"action": bson.M{"$in": actions}},
+		options.Find().SetSort(bson.D{{Key: "created_at", Value: -1}}))
+	if err != nil {
+		return err
+	}
+	var entries []AuditEntry
+	if err := cur.All(ctx, &entries); err != nil {
+		return err
+	}
+
+	recorded := 0
+	for _, e := range entries {
+		prefix := prefixes[e.Action]
+		if e.Target == "" || !strings.HasPrefix(e.Detail, prefix) {
+			continue
+		}
+		oldID := strings.TrimSpace(strings.TrimPrefix(e.Detail, prefix))
+		if oldID == "" || oldID == e.Target {
+			continue
+		}
+		res, err := db.Admin("admin_instances").UpdateOne(ctx,
+			bson.M{"$or": bson.A{
+				bson.M{"instance_id": e.Target},
+				bson.M{"previous_instance_ids": e.Target},
+			}},
+			bson.M{"$addToSet": bson.M{"previous_instance_ids": oldID}})
+		if err != nil {
+			return err
+		}
+		recorded += int(res.ModifiedCount)
+	}
+	if recorded > 0 {
+		log.Printf("backfill: recovered %d instance id rewrites from the audit log", recorded)
+	}
+	return nil
+}
+
+// backfillEntitlements reconstructs an entitlement per instance from its licence.
+//
+// An Unlimited max_servers maps back to the plan's BASE allowance rather than to
+// a huge number: an unlimited licence bought no server units, so the honest
+// reconstruction of "how many did they pay for" is none. This makes a
+// pre-metering Professional instance read as 3 servers, which is a REDUCTION in
+// what it is allowed. That is deliberate and it is why this is a plan step and
+// not a silent fix — see the task's confirmation step.
+func backfillEntitlements(ctx context.Context) error {
+	cur, err := db.Admin("admin_instances").Find(ctx,
+		bson.M{"status": bson.M{"$ne": StatusDeleted}})
+	if err != nil {
+		return err
+	}
+	var instances []Instance
+	if err := cur.All(ctx, &instances); err != nil {
+		return err
+	}
+
+	created := 0
+	for _, inst := range instances {
+		n, err := db.Admin("entitlements").CountDocuments(ctx,
+			bson.M{"instance_id": inst.InstanceID})
+		if err != nil {
+			return err
+		}
+		if n > 0 {
+			continue
+		}
+
+		deployment, tier := license.NormaliseTier(inst.Deployment, inst.Tier)
+		if tier == "" {
+			// An instance awaiting its first licence has no tier. It gets an
+			// entitlement when one is issued, not before.
+			continue
+		}
+		plan, err := GetPlan(ctx, deployment, tier)
+		if err != nil {
+			log.Printf("backfill: instance %s names unknown plan %s/%s; skipped",
+				inst.InstanceID, deployment, tier)
+			continue
+		}
+
+		cfg := Config{Servers: plan.BaseLimits.MaxServers, Features: Features{}}
+		if inst.CurrentLicense != "" {
+			var lic License
+			if err := db.Admin("licenses").FindOne(ctx,
+				bson.M{"license_id": inst.CurrentLicense}).Decode(&lic); err == nil {
+				if lic.Limits.MaxServers != license.Unlimited && lic.Limits.MaxServers > 0 {
+					cfg.Servers = lic.Limits.MaxServers
+				}
+				cfg.Features = lic.Features.OrEmpty()
+			}
+		}
+
+		limits := plan.BaseLimits
+		limits.MaxServers = cfg.Servers
+		if err := UpsertEntitlement(ctx, Entitlement{
+			InstanceID:     inst.InstanceID,
+			AccountID:      inst.AccountID,
+			Deployment:     deployment,
+			Tier:           tier,
+			Term:           defaultTerm(deployment),
+			Desired:        cfg,
+			Granted:        cfg,
+			ResolvedLimits: limits,
+		}); err != nil {
+			return err
+		}
+		created++
+	}
+	if created > 0 {
+		log.Printf("backfill: created %d entitlements from current licences", created)
+	}
+	return nil
+}
+
+// defaultTerm is the term to assume for a reconstructed entitlement. Self-hosted
+// sells annual only, so there is nothing to guess there.
+func defaultTerm(deployment string) string {
+	if deployment == license.DeploymentSelfHosted {
+		return "annual"
+	}
+	return "monthly"
+}

admin/internal/models/catalogue.go

@@ -0,0 +1,142 @@
+package models
+
+import (
+	"context"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+// Component kinds.
+const (
+	// KindBase is the plan's own fee, always quantity 1.
+	KindBase = "base"
+	// KindLimit raises a named limit by one per unit of quantity.
+	KindLimit = "limit"
+	// KindFeature is an on/off feature key.
+	KindFeature = "feature"
+)
+
+// LimitKeyServers is the only metered limit today.
+//
+// A limit_key is a field name in license.Limits, which is what lets a second
+// metered dimension be a catalogue row rather than a code change. There is
+// deliberately no block size: with secret-group blocks dropped from the spec it
+// would be 1 in every row that will ever exist.
+const LimitKeyServers = "max_servers"
+
+// CatalogueRow is one priceable component of one plan.
+//
+// This is the ONLY place a Paddle price ID appears anywhere in Vantage. An empty
+// PriceIDs means the component is free — a feature with no price is a toggle a
+// customer may take at no charge, and giving it a price later is a staff edit
+// rather than a migration or a deploy.
+type CatalogueRow struct {
+	ID         bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	Kind       string        `bson:"kind" json:"kind"`
+	Deployment string        `bson:"deployment" json:"deployment"`
+	Tier       string        `bson:"tier" json:"tier"`
+	LimitKey   string        `bson:"limit_key,omitempty" json:"limit_key,omitempty"`
+	FeatureKey string        `bson:"feature_key,omitempty" json:"feature_key,omitempty"`
+	// PriceIDs is environment -> term -> Paddle price ID, e.g.
+	// {"sandbox": {"monthly": "pri_…"}, "production": {"annual": "pri_…"}}.
+	//
+	// Nested by environment rather than kept in two collections, because
+	// promoting sandbox to production must be a configuration change and not a
+	// data migration. The running PADDLE_ENV picks the inner map.
+	PriceIDs map[string]map[string]string `bson:"price_ids,omitempty" json:"price_ids,omitempty"`
+}
+
+// PriceID returns the price for one environment and term, or "".
+func (r CatalogueRow) PriceID(env, term string) string {
+	if r.PriceIDs == nil {
+		return ""
+	}
+	return r.PriceIDs[env][term]
+}
+
+// Priced reports whether this component costs anything in an environment.
+func (r CatalogueRow) Priced(env string) bool {
+	for _, term := range []string{"monthly", "annual"} {
+		if r.PriceID(env, term) != "" {
+			return true
+		}
+	}
+	return false
+}
+
+// SeedCatalogue inserts the twenty rows the four PAID plans need: a base, a
+// server limit, and one row per feature key.
+//
+// The two Free plans get no rows at all, and that absence is what keeps Free
+// outside Paddle: with nothing to price, no checkout can be built for it. Do not
+// "fix" this by adding zero-priced Free rows.
+//
+// $setOnInsert only, for the same reason as SeedPlans: the price IDs are pasted
+// in by staff and a redeploy must not blank them.
+func SeedCatalogue(ctx context.Context) error {
+	paid := []string{license.TierProfessional, license.TierEnterprise}
+	for _, deployment := range license.Deployments() {
+		for _, tier := range paid {
+			rows := []CatalogueRow{
+				{Kind: KindBase, Deployment: deployment, Tier: tier},
+				{Kind: KindLimit, Deployment: deployment, Tier: tier, LimitKey: LimitKeyServers},
+				{Kind: KindFeature, Deployment: deployment, Tier: tier, FeatureKey: license.FeatureConsole},
+				{Kind: KindFeature, Deployment: deployment, Tier: tier, FeatureKey: license.FeatureOIDC},
+				{Kind: KindFeature, Deployment: deployment, Tier: tier, FeatureKey: license.FeatureVulnScanning},
+			}
+			for _, r := range rows {
+				filter := bson.M{
+					"kind":        r.Kind,
+					"deployment":  r.Deployment,
+					"tier":        r.Tier,
+					"limit_key":   r.LimitKey,
+					"feature_key": r.FeatureKey,
+				}
+				if _, err := db.Admin("catalogue").UpdateOne(ctx, filter,
+					bson.M{"$setOnInsert": bson.M{
+						"kind":        r.Kind,
+						"deployment":  r.Deployment,
+						"tier":        r.Tier,
+						"limit_key":   r.LimitKey,
+						"feature_key": r.FeatureKey,
+						"price_ids":   map[string]map[string]string{},
+					}},
+					options.UpdateOne().SetUpsert(true)); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// CatalogueFor returns every component of one plan.
+func CatalogueFor(ctx context.Context, deployment, tier string) ([]CatalogueRow, error) {
+	deployment, tier = license.NormaliseTier(deployment, tier)
+	cur, err := db.Admin("catalogue").Find(ctx,
+		bson.M{"deployment": deployment, "tier": tier})
+	if err != nil {
+		return nil, err
+	}
+	rows := []CatalogueRow{}
+	if err := cur.All(ctx, &rows); err != nil {
+		return nil, err
+	}
+	return rows, nil
+}
+
+// AllCatalogue returns every row, for the staff editor.
+func AllCatalogue(ctx context.Context) ([]CatalogueRow, error) {
+	cur, err := db.Admin("catalogue").Find(ctx, bson.M{})
+	if err != nil {
+		return nil, err
+	}
+	rows := []CatalogueRow{}
+	if err := cur.All(ctx, &rows); err != nil {
+		return nil, err
+	}
+	return rows, nil
+}

admin/internal/models/entitlements.go

@@ -0,0 +1,139 @@
+package models
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+// ErrNoEntitlement means the instance has no configuration row.
+//
+// Callers fall back to the plan's base rather than failing: staff manual
+// issuance and any instance predating the backfill legitimately have none.
+var ErrNoEntitlement = errors.New("instance has no entitlement")
+
+// Config is one side of an entitlement — a complete statement of what an
+// instance is allowed.
+//
+// Servers is the TOTAL the customer sees, not the number of units billed. The
+// billed quantity is Servers minus the plan's base allowance, and it is computed
+// where the line items are built rather than stored, so the two can never
+// disagree about which of them included the base.
+type Config struct {
+	Servers  int      `bson:"servers" json:"servers"`
+	Features Features `bson:"features" json:"features"`
+}
+
+// Entitlement is what one instance's customer configured.
+//
+// Both the subscription and the licence are derived from it; it is derived from
+// nothing. Desired is what they last asked for; Granted is what a payment
+// confirmed. A licence is only ever signed from Granted, so an abandoned
+// checkout leaves a Desired that reached nothing.
+type Entitlement struct {
+	ID         bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	InstanceID string        `bson:"instance_id" json:"instance_id"`
+	AccountID  string        `bson:"account_id" json:"account_id"`
+	Deployment string        `bson:"deployment" json:"deployment"`
+	Tier       string        `bson:"tier" json:"tier"`
+	Term       string        `bson:"term" json:"term"`
+
+	Desired Config `bson:"desired" json:"desired"`
+	Granted Config `bson:"granted" json:"granted"`
+
+	// ResolvedLimits is BaseLimits with Granted folded in. It is stored rather
+	// than derived on read so the fold lives in exactly one place — deriving it
+	// at every read would put the arithmetic in the issuer, the portal and the
+	// staff console.
+	ResolvedLimits license.Limits `bson:"resolved_limits" json:"resolved_limits"`
+
+	// ScheduledChangeAt is when a pending REDUCTION takes effect. It is set only
+	// when Desired grants less than Granted, and it is what lets the portal say
+	// "drops to 5 on 12 August" instead of guessing.
+	ScheduledChangeAt *time.Time `bson:"scheduled_change_at,omitempty" json:"scheduled_change_at,omitempty"`
+
+	GrantedAt time.Time `bson:"granted_at" json:"granted_at"`
+	UpdatedAt time.Time `bson:"updated_at" json:"updated_at"`
+}
+
+// Pending reports whether Desired and Granted disagree.
+func (e Entitlement) Pending() bool {
+	if e.Desired.Servers != e.Granted.Servers {
+		return true
+	}
+	if len(e.Desired.Features) != len(e.Granted.Features) {
+		return true
+	}
+	have := map[string]bool{}
+	for _, f := range e.Granted.Features {
+		have[f] = true
+	}
+	for _, f := range e.Desired.Features {
+		if !have[f] {
+			return true
+		}
+	}
+	return false
+}
+
+// GetEntitlement reads one instance's configuration.
+func GetEntitlement(ctx context.Context, instanceID string) (*Entitlement, error) {
+	var e Entitlement
+	err := db.Admin("entitlements").FindOne(ctx,
+		bson.M{"instance_id": instanceID}).Decode(&e)
+	if errors.Is(err, mongo.ErrNoDocuments) {
+		return nil, ErrNoEntitlement
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &e, nil
+}
+
+// UpsertEntitlement writes an entitlement, creating it if absent.
+//
+// GrantedAt is only touched when Granted actually changes, which is what makes
+// it answer "since when has this instance been allowed this" rather than "when
+// was this row last written".
+func UpsertEntitlement(ctx context.Context, e Entitlement) error {
+	now := time.Now().UTC()
+	set := bson.M{
+		"account_id":      e.AccountID,
+		"deployment":      e.Deployment,
+		"tier":            e.Tier,
+		"term":            e.Term,
+		"desired":         e.Desired,
+		"granted":         e.Granted,
+		"resolved_limits": e.ResolvedLimits,
+		"updated_at":      now,
+	}
+	if e.ScheduledChangeAt != nil {
+		set["scheduled_change_at"] = *e.ScheduledChangeAt
+	}
+	if !e.GrantedAt.IsZero() {
+		set["granted_at"] = e.GrantedAt
+	} else {
+		set["granted_at"] = now
+	}
+	update := bson.M{"$set": set}
+	if e.ScheduledChangeAt == nil {
+		update["$unset"] = bson.M{"scheduled_change_at": ""}
+	}
+	_, err := db.Admin("entitlements").UpdateOne(ctx,
+		bson.M{"instance_id": e.InstanceID},
+		mergeSetOnInsert(update, bson.M{"instance_id": e.InstanceID}),
+		options.UpdateOne().SetUpsert(true))
+	return err
+}
+
+// mergeSetOnInsert adds a $setOnInsert clause without clobbering an existing one.
+func mergeSetOnInsert(update bson.M, onInsert bson.M) bson.M {
+	update["$setOnInsert"] = onInsert
+	return update
+}

admin/internal/models/members.go

@@ -0,0 +1,60 @@
+package models
+
+import (
+	"time"
+
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Account roles.
+//
+// Deliberately the same three words as the control plane's own roles rather
+// than a second vocabulary: a customer who reads "admin" in the portal and
+// "admin" in their instance should not have to learn that they mean different
+// things. They govern different scopes — this one governs the HQ account —
+// but they mean the same thing about power.
+//
+// Billing stays owner-only. Owners and admins may invite people, create
+// instances and grant instance access.
+const (
+	AccountRoleOwner  = "owner"
+	AccountRoleAdmin  = "admin"
+	AccountRoleMember = "member"
+)
+
+func ValidAccountRole(r string) bool {
+	switch r {
+	case AccountRoleOwner, AccountRoleAdmin, AccountRoleMember:
+		return true
+	}
+	return false
+}
+
+// AccountRoleAtLeastAdmin is the single definition of "may manage people and
+// instances". Every guard calls this rather than comparing strings, so widening
+// the rule is one edit.
+func AccountRoleAtLeastAdmin(r string) bool {
+	return r == AccountRoleOwner || r == AccountRoleAdmin
+}
+
+// InstanceMember records that one HQ person holds a projected user inside one
+// cloud instance.
+//
+// It is admin's index of the projection, not the authority: the control-plane
+// `users` row IS the access. This row exists so the portal can list who is on
+// an instance without reading the control plane, and so a password change can
+// find every row to update without scanning every instance.
+//
+// ControlUserID is the projected users.user_id. Role is the role that user
+// holds INSIDE the instance, which is not the person's account role.
+type InstanceMember struct {
+	ID             bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	MemberID       string        `bson:"member_id" json:"member_id"`
+	AccountID      string        `bson:"account_id" json:"account_id"`
+	InstanceID     string        `bson:"instance_id" json:"instance_id"`
+	CustomerUserID string        `bson:"customer_user_id" json:"customer_user_id"`
+	ControlUserID  string        `bson:"control_user_id" json:"control_user_id"`
+	Role           string        `bson:"role" json:"role"`
+	Email          string        `bson:"email" json:"email"`
+	CreatedAt      time.Time     `bson:"created_at" json:"created_at"`
+}

admin/internal/models/models.go

@@ -0,0 +1,284 @@
+// Package models holds admin's own documents.
+//
+// These are admin-owned and never shared with the control plane. The two
+// structs that ARE shared — Instance and User on the control-plane side — come
+// from shared/models, so there is no second copy of those shapes to drift.
+package models
+
+import (
+	"encoding/json"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Features is a list of feature flags that marshals as `[]` rather than `null`.
+//
+// A nil Go slice becomes JSON null. The Free plan has no features, so every
+// Free licence served `"features": null`, and the portal — whose type said
+// string[] — called .length on it and took the page down with it.
+//
+// The guarantee lives on the type rather than at each of the six places a
+// licence or plan is serialised, because the seventh is the one that would have
+// been forgotten. It also fixes rows already holding null in Mongo, since it
+// applies at marshal time rather than at write time.
+type Features []string
+
+func (f Features) MarshalJSON() ([]byte, error) {
+	if f == nil {
+		return []byte("[]"), nil
+	}
+	return json.Marshal([]string(f))
+}
+
+// OrEmpty is the same guarantee for values headed to Mongo rather than to JSON,
+// so a null never enters the database in the first place.
+func (f Features) OrEmpty() Features {
+	if f == nil {
+		return Features{}
+	}
+	return f
+}
+
+// Instance statuses.
+const (
+	StatusAwaitingLink = "awaiting_link"
+	StatusActive       = "active"
+	StatusLapsed       = "lapsed"
+	StatusCancelled    = "cancelled"
+
+	// StatusDeleted marks an instance the control plane has reaped. The row is
+	// kept because the licence history references it and support questions
+	// outlive the instance.
+	StatusDeleted = "deleted"
+)
+
+// Account statuses.
+const (
+	AccountActive    = "active"
+	AccountSuspended = "suspended"
+)
+
+// Licence issuance reasons. These end up in support conversations, so they are
+// stable identifiers rather than prose.
+const (
+	ReasonNew        = "new"
+	ReasonRenewal    = "renewal"
+	ReasonTierChange = "tier_change"
+	ReasonRelink     = "relink"
+	ReasonManual     = "manual"
+
+	// ReasonEntitlementChange is a mid-term change to what an instance is
+	// allowed — servers added, a feature toggled — at the same expiry.
+	//
+	// It is deliberately NOT ReasonRenewal: a renewal resets relink_count
+	// because a new term has begun, and adding a server does not begin one.
+	ReasonEntitlementChange = "entitlement_change"
+)
+
+// Subscription statuses, mirrored from Paddle. Ours, not a vendor SDK's, so the
+// billing package does not import anything Paddle.
+const (
+	SubActive   = "active"
+	SubCanceled = "canceled"
+	SubPastDue  = "past_due"
+	SubTrialing = "trialing"
+)
+
+// Billing terms. These match catalogue price-ID keys and license.TermsFor.
+const (
+	TermMonthly = "monthly"
+	TermAnnual  = "annual"
+)
+
+// MaxRelinksPerTerm is the customer-facing relink cap.
+//
+// This is an abuse SIGNAL, not abuse prevention — offline licences cannot be
+// revoked, so a determined customer is not stopped by a counter. Its real job is
+// to put a human in front of the fourth attempt.
+const MaxRelinksPerTerm = 3
+
+// GracePeriod is added to every licence expiry beyond the billing period end,
+// so a renewal webhook arriving slightly late does not create a gap in which a
+// paying customer's instance goes read-only.
+const GracePeriod = 3 * 24 * time.Hour
+
+// RenewWindow is how long before expiry a Free instance may be renewed.
+//
+// Renewal stays available after expiry too, right up until the reaper takes the
+// instance, so the same button rescues a lapsed instance instead of needing a
+// second mechanism.
+const RenewWindow = 7 * 24 * time.Hour
+
+type Account struct {
+	ID               bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	AccountID        string        `bson:"account_id" json:"account_id"`
+	Name             string        `bson:"name" json:"name"`
+	BillingEmail     string        `bson:"billing_email" json:"billing_email"`
+	PaddleCustomerID string        `bson:"paddle_customer_id,omitempty" json:"paddle_customer_id,omitempty"`
+	Status           string        `bson:"status" json:"status"`
+	CreatedAt        time.Time     `bson:"created_at" json:"created_at"`
+}
+
+// Instance is admin's record of one deployment.
+//
+// For cloud, InstanceID equals the control-plane instance_id. For self-hosted it
+// is the UUID the customer pasted — their database is theirs, and we cannot see
+// it, so this row is the only thing that exists on our side.
+type Instance struct {
+	ID             bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	InstanceID     string        `bson:"instance_id" json:"instance_id"`
+	AccountID      string        `bson:"account_id" json:"account_id"`
+	Name           string        `bson:"name" json:"name"`
+	Slug           string        `bson:"slug,omitempty" json:"slug,omitempty"`
+	Deployment     string        `bson:"deployment" json:"deployment"`
+	Tier           string        `bson:"tier,omitempty" json:"tier,omitempty"`
+	Status         string        `bson:"status" json:"status"`
+	CurrentLicense string        `bson:"current_license,omitempty" json:"current_license,omitempty"`
+	RelinkCount    int           `bson:"relink_count" json:"relink_count"`
+	InjectFailedAt *time.Time    `bson:"inject_failed_at,omitempty" json:"inject_failed_at,omitempty"`
+	// NoticesSent holds the lifecycle notice keys already emailed for the
+	// CURRENT term ("expiring", "expired", "delete_7", "delete_1"). Renewal
+	// clears it, so the next term starts the sequence again. It is what stops a
+	// restart re-sending a notice.
+	NoticesSent []string `bson:"notices_sent,omitempty" json:"notices_sent,omitempty"`
+	// Placeholder is true while a self-hosted instance row exists only so a
+	// checkout has something to attach custom_data to, before the customer has
+	// pasted their install's real UUID. Cleared when the instance is linked.
+	Placeholder bool `bson:"placeholder,omitempty" json:"placeholder,omitempty"`
+	// PreviousInstanceIDs is every id this row has carried before its current one.
+	// A self-hosted row's identity is rewritten twice over its life — once when a
+	// paid placeholder is claimed, and again on each relink to a rebuilt server —
+	// and Paddle keeps its own copy of custom_data written at checkout. That copy
+	// is patched on each rewrite, but the patch is best-effort and any event
+	// already in flight still names an old id, so this is what lets a webhook
+	// resolve to the right instance instead of erroring as unknown.
+	PreviousInstanceIDs []string `bson:"previous_instance_ids,omitempty" json:"-"`
+	// PendingOwnerUserID is the customer_user who bought a paid-cloud placeholder,
+	// remembered so the confirmed-payment webhook can provision the instance with
+	// them as owner. Cleared once provisioned. Only ever set on a cloud placeholder.
+	PendingOwnerUserID string    `bson:"pending_owner_user_id,omitempty" json:"-"`
+	CreatedAt          time.Time `bson:"created_at" json:"created_at"`
+}
+
+// License is append-only. A renewal writes a new row and sets SupersededBy on
+// the old one. Nothing here is ever edited or deleted: when a support question
+// arrives about why an instance stopped working on a given date, the answer has
+// to still be in the table.
+type License struct {
+	ID           bson.ObjectID  `bson:"_id,omitempty" json:"-"`
+	LicenseID    string         `bson:"license_id" json:"license_id"`
+	InstanceID   string         `bson:"instance_id" json:"instance_id"`
+	AccountID    string         `bson:"account_id" json:"account_id"`
+	Tier         string         `bson:"tier" json:"tier"`
+	Deployment   string         `bson:"deployment" json:"deployment"`
+	Limits       license.Limits `bson:"limits" json:"limits"`
+	Features     Features       `bson:"features" json:"features"`
+	IssuedAt     time.Time      `bson:"issued_at" json:"issued_at"`
+	ExpiresAt    time.Time      `bson:"expires_at" json:"expires_at"`
+	Blob         string         `bson:"blob" json:"-"`
+	SupersededBy string         `bson:"superseded_by,omitempty" json:"superseded_by,omitempty"`
+	IssuedBy     string         `bson:"issued_by" json:"issued_by"`
+	Reason       string         `bson:"reason" json:"reason"`
+}
+
+type Subscription struct {
+	ID                   bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	SubscriptionID       string        `bson:"subscription_id" json:"subscription_id"`
+	AccountID            string        `bson:"account_id" json:"account_id"`
+	InstanceID           string        `bson:"instance_id,omitempty" json:"instance_id,omitempty"`
+	PaddleSubscriptionID string        `bson:"paddle_subscription_id,omitempty" json:"paddle_subscription_id,omitempty"`
+	Tier                 string        `bson:"tier" json:"tier"`
+	Term                 string        `bson:"term" json:"term"`
+	Status               string        `bson:"status" json:"status"`
+	CurrentPeriodEnd     time.Time     `bson:"current_period_end" json:"current_period_end"`
+	// Items is the full line-item list. Spec 7 made a subscription several
+	// prices — a base, a per-server unit at quantity N, an item per paid
+	// feature — so a single price ID can no longer describe it.
+	Items []SubItem `bson:"items,omitempty" json:"items,omitempty"`
+}
+
+// SubItem is one line of a subscription: a price and its quantity, the shape
+// catalogue.ResolveItems reads back into a plan and configuration.
+type SubItem struct {
+	PriceID  string `bson:"price_id" json:"price_id"`
+	Quantity int    `bson:"quantity" json:"quantity"`
+}
+
+// PaddleEvent is the idempotency record for one webhook delivery. The unique
+// index on EventID is what makes a retry a no-op rather than a second licence.
+type PaddleEvent struct {
+	ID          bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	EventID     string        `bson:"event_id" json:"event_id"`
+	EventType   string        `bson:"event_type" json:"event_type"`
+	ReceivedAt  time.Time     `bson:"received_at" json:"received_at"`
+	ProcessedAt *time.Time    `bson:"processed_at,omitempty" json:"processed_at,omitempty"`
+	Error       string        `bson:"error,omitempty" json:"error,omitempty"`
+}
+
+// Plan is the authoritative definition of one (deployment, tier) pair, seeded
+// from shared/license.
+//
+// It lives in the database so tier contents change without a deploy. Every
+// issued licence snapshots it, so editing a plan never rewrites an existing
+// licence — the same rule as workflow_runs.steps_snapshot.
+//
+// It holds NO Paddle identifiers. Every price ID lives in `catalogue`, because a
+// metered plan is priced by several components and a single map on this row
+// cannot express that.
+type Plan struct {
+	ID         bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	Deployment string        `bson:"deployment" json:"deployment"`
+	Tier       string        `bson:"tier" json:"tier"`
+	Name       string        `bson:"name" json:"name"`
+	// BaseLimits is the allowance before anything is bought. The field is named
+	// `base_` rather than `limits` because that is a different claim from the one
+	// the old field made, and a reader must not assume it is the total.
+	BaseLimits   license.Limits `bson:"base_limits" json:"base_limits"`
+	BaseFeatures Features       `bson:"base_features" json:"base_features"`
+	SupportLevel string         `bson:"support_level" json:"support_level"`
+	Active       bool           `bson:"active" json:"active"`
+}
+
+type StaffUser struct {
+	ID           bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	UserID       string        `bson:"user_id" json:"user_id"`
+	Email        string        `bson:"email" json:"email"`
+	PasswordHash string        `bson:"password_hash" json:"-"`
+	Name         string        `bson:"name" json:"name"`
+	CreatedAt    time.Time     `bson:"created_at" json:"created_at"`
+}
+
+// CustomerUser is one person on an HQ account.
+//
+// AccountRole governs what they may do to the ACCOUNT — invite people, create
+// instances, grant access. It says nothing about what they may do inside any
+// instance; that is the role on their InstanceMember row.
+type CustomerUser struct {
+	ID                bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	UserID            string        `bson:"user_id" json:"user_id"`
+	AccountID         string        `bson:"account_id" json:"account_id"`
+	Email             string        `bson:"email" json:"email"`
+	PasswordHash      string        `bson:"password_hash" json:"-"`
+	AccountRole       string        `bson:"account_role" json:"account_role"`
+	VerifiedAt        *time.Time    `bson:"verified_at,omitempty" json:"verified_at,omitempty"`
+	VerifyTokenHash   string        `bson:"verify_token_hash,omitempty" json:"-"`
+	VerifyTokenExpiry *time.Time    `bson:"verify_token_expiry,omitempty" json:"-"`
+	// HQSyncFailedAt is set when a password change could not be written to
+	// every projected control-plane row. It is visibility only — hqsync repairs
+	// by comparing hashes, not by reading this field.
+	HQSyncFailedAt *time.Time `bson:"hq_sync_failed_at,omitempty" json:"hq_sync_failed_at,omitempty"`
+	CreatedAt      time.Time  `bson:"created_at" json:"created_at"`
+}
+
+type AuditEntry struct {
+	ID        bson.ObjectID `bson:"_id,omitempty" json:"-"`
+	Actor     string        `bson:"actor" json:"actor"`
+	Action    string        `bson:"action" json:"action"`
+	AccountID string        `bson:"account_id,omitempty" json:"account_id,omitempty"`
+	Target    string        `bson:"target,omitempty" json:"target,omitempty"`
+	Detail    string        `bson:"detail,omitempty" json:"detail,omitempty"`
+	IP        string        `bson:"ip,omitempty" json:"ip,omitempty"`
+	CreatedAt time.Time     `bson:"created_at" json:"created_at"`
+}

admin/internal/models/paddle_events.go

@@ -0,0 +1,48 @@
+package models
+
+import (
+	"context"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo"
+)
+
+// ClaimEvent records an event ID before it is processed and reports whether THIS
+// call is the one that claimed it.
+//
+// The unique index on event_id turns a duplicate insert into a duplicate-key
+// error, which is the signal that another delivery of the same event already
+// owns it — so this returns (false, nil) and the caller answers 200 without
+// acting. A genuine error returns (false, err).
+func ClaimEvent(ctx context.Context, eventID, eventType string) (bool, error) {
+	_, err := db.Admin("paddle_events").InsertOne(ctx, PaddleEvent{
+		EventID:    eventID,
+		EventType:  eventType,
+		ReceivedAt: time.Now().UTC(),
+	})
+	if err == nil {
+		return true, nil
+	}
+	if mongo.IsDuplicateKeyError(err) {
+		return false, nil
+	}
+	return false, err
+}
+
+// MarkEventProcessed stamps success, or records the error for staff visibility.
+// A failed event keeps no processed_at, so a retry re-runs it.
+func MarkEventProcessed(ctx context.Context, eventID string, procErr error) error {
+	set := bson.M{}
+	if procErr != nil {
+		set["error"] = procErr.Error()
+	} else {
+		now := time.Now().UTC()
+		set["processed_at"] = now
+		set["error"] = ""
+	}
+	_, err := db.Admin("paddle_events").UpdateOne(ctx,
+		bson.M{"event_id": eventID}, bson.M{"$set": set})
+	return err
+}

admin/internal/models/plans.go

@@ -0,0 +1,60 @@
+package models
+
+import (
+	"context"
+	"time"
+
+	"gitea.hostxtra.co.uk/mrhid6/vantage/admin/internal/db"
+	"gitea.hostxtra.co.uk/mrhid6/vantage/shared/license"
+	"go.mongodb.org/mongo-driver/v2/bson"
+	"go.mongodb.org/mongo-driver/v2/mongo/options"
+)
+
+// SeedPlans inserts the six (deployment, tier) rows from shared/license on first
+// boot.
+//
+// It uses $setOnInsert only: once a plan exists, staff edits to allowances,
+// features and support level are authoritative and a redeploy must not stamp
+// over them.
+func SeedPlans(ctx context.Context) error {
+	for _, deployment := range license.Deployments() {
+		for _, tier := range license.Tiers() {
+			p, ok := license.PlanFor(deployment, tier)
+			if !ok {
+				continue
+			}
+			_, err := db.Admin("plans").UpdateOne(ctx,
+				bson.M{"deployment": deployment, "tier": tier},
+				bson.M{"$setOnInsert": bson.M{
+					"deployment":    p.Deployment,
+					"tier":          p.Tier,
+					"name":          p.Name,
+					"base_limits":   p.Limits,
+					"base_features": Features(p.Features).OrEmpty(),
+					"support_level": p.SupportLevel,
+					"active":        true,
+				}},
+				options.UpdateOne().SetUpsert(true))
+			if err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// GetPlan reads one pair's authoritative definition.
+//
+// It normalises the tier first, so a legacy self_hosted licence being reissued
+// resolves to the plan that replaced it.
+func GetPlan(ctx context.Context, deployment, tier string) (*Plan, error) {
+	deployment, tier = license.NormaliseTier(deployment, tier)
+	var p Plan
+	if err := db.Admin("plans").FindOne(ctx,
+		bson.M{"deployment": deployment, "tier": tier}).Decode(&p); err != nil {
+		return nil, err
+	}
+	return &p, nil
+}
+
+func now() time.Time { return time.Now().UTC() }

admin/internal/paddle/client.go

@@ -0,0 +1,58 @@
+// Package paddle is the only place that talks to Paddle. Everything outside it
+// depends on the Client interface and our own types, never on Paddle's wire
+// shapes — so a change at Paddle is confined to http.go, and the billing package
+// can be reasoned about without knowing Paddle exists.
+//
+// It is a thin REST client rather than the vendor SDK on purpose: the surface we
+// need is two calls, and a hand-rolled client has no version-drift risk and no
+// dependency to keep in go.sum.
+package paddle
+
+import "context"
+
+// LineItem is one price at a quantity, the shape both a checkout and a
+// subscription update are built from.
+type LineItem struct {
+	PriceID  string
+	Quantity int
+}
+
+// Client is the narrow slice of Paddle admin needs. Checkout itself happens in
+// the browser via paddle-js; the server only updates an existing subscription
+// and mints a portal session.
+type Client interface {
+	// UpdateSubscriptionItems replaces a subscription's items, prorated
+	// immediately by Paddle. This is the one outbound mutation, used when a
+	// customer changes their server count or features on an existing plan.
+	UpdateSubscriptionItems(ctx context.Context, paddleSubscriptionID string, items []LineItem) error
+	// UpdateSubscriptionCustomData replaces a subscription's custom_data. Used
+	// when a self-hosted placeholder is claimed: the checkout attached the
+	// placeholder id, and every later webhook must name the real install UUID.
+	UpdateSubscriptionCustomData(ctx context.Context, paddleSubscriptionID string, data map[string]string) error
+	// PortalSession returns a customer-portal URL for managing billing.
+	PortalSession(ctx context.Context, paddleCustomerID string) (string, error)
+	// Env is "sandbox" or "production", the same value catalogue price lookups
+	// are keyed on.
+	Env() string
+}
+
+var current Client
+
+// Init constructs the client from config and stores it. Called once at boot.
+func Init(apiKey, env string) (Client, error) {
+	c, err := newHTTPClient(apiKey, env)
+	if err != nil {
+		return nil, err
+	}
+	current = c
+	return c, nil
+}
+
+// Get returns the client initialised at boot. Panics if unset, which can only
+// happen if a caller runs before Init — a programming error, not a runtime one.
+func Get() Client {
+	if current == nil {
+		panic("paddle.Get before paddle.Init")
+	}
+	return current
+}

admin/internal/paddle/http.go

@@ -0,0 +1,131 @@
+package paddle
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+// httpClient is the only implementation of Client. It is the single place that
+// knows Paddle's base URLs, auth header and request shapes — swap the whole
+// vendor here without the rest of the tree noticing.
+type httpClient struct {
+	apiKey string
+	env    string
+	base   string
+	http   *http.Client
+}
+
+func newHTTPClient(apiKey, env string) (Client, error) {
+	if apiKey == "" {
+		return nil, fmt.Errorf("paddle: empty API key")
+	}
+	base := "https://sandbox-api.paddle.com"
+	if env == "production" {
+		base = "https://api.paddle.com"
+	}
+	return &httpClient{
+		apiKey: apiKey,
+		env:    env,
+		base:   base,
+		http:   &http.Client{Timeout: 20 * time.Second},
+	}, nil
+}
+
+func (c *httpClient) Env() string { return c.env }
+
+// do sends a JSON request and decodes the `data` envelope Paddle wraps every
+// response in. A non-2xx is returned as an error carrying the body, so a
+// configuration or auth failure is loud rather than silent.
+func (c *httpClient) do(ctx context.Context, method, path string, body any, out any) error {
+	var buf io.Reader
+	if body != nil {
+		b, err := json.Marshal(body)
+		if err != nil {
+			return fmt.Errorf("paddle: marshal %s %s: %w", method, path, err)
+		}
+		buf = bytes.NewReader(b)
+	}
+	req, err := http.NewRequestWithContext(ctx, method, c.base+path, buf)
+	if err != nil {
+		return fmt.Errorf("paddle: build %s %s: %w", method, path, err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.apiKey)
+	req.Header.Set("Content-Type", "application/json")
+
+	res, err := c.http.Do(req)
+	if err != nil {
+		return fmt.Errorf("paddle: %s %s: %w", method, path, err)
+	}
+	defer res.Body.Close()
+	raw, _ := io.ReadAll(res.Body)
+	if res.StatusCode < 200 || res.StatusCode >= 300 {
+		return fmt.Errorf("paddle: %s %s returned %d: %s", method, path, res.StatusCode, string(raw))
+	}
+	if out == nil {
+		return nil
+	}
+	if err := json.Unmarshal(raw, out); err != nil {
+		return fmt.Errorf("paddle: decode %s %s: %w", method, path, err)
+	}
+	return nil
+}
+
+type updateSubscriptionRequest struct {
+	Items                []reqItem `json:"items"`
+	ProrationBillingMode string    `json:"proration_billing_mode"`
+}
+
+type reqItem struct {
+	PriceID  string `json:"price_id"`
+	Quantity int    `json:"quantity"`
+}
+
+func (c *httpClient) UpdateSubscriptionItems(ctx context.Context, subID string, items []LineItem) error {
+	if subID == "" {
+		return fmt.Errorf("paddle: empty subscription id")
+	}
+	reqItems := make([]reqItem, 0, len(items))
+	for _, it := range items {
+		reqItems = append(reqItems, reqItem{PriceID: it.PriceID, Quantity: it.Quantity})
+	}
+	return c.do(ctx, http.MethodPatch, "/subscriptions/"+subID, updateSubscriptionRequest{
+		Items:                reqItems,
+		ProrationBillingMode: "prorated_immediately",
+	}, nil)
+}
+
+// UpdateSubscriptionCustomData patches custom_data only. Paddle replaces the
+// whole object, so callers pass every key they want to keep.
+func (c *httpClient) UpdateSubscriptionCustomData(ctx context.Context, subID string, data map[string]string) error {
+	if subID == "" {
+		return fmt.Errorf("paddle: empty subscription id")
+	}
+	return c.do(ctx, http.MethodPatch, "/subscriptions/"+subID, struct {
+		CustomData map[string]string `json:"custom_data"`
+	}{CustomData: data}, nil)
+}
+
+func (c *httpClient) PortalSession(ctx context.Context, customerID string) (string, error) {
+	if customerID == "" {
+		return "", fmt.Errorf("paddle: empty customer id")
+	}
+	var out struct {
+		Data struct {
+			URLs struct {
+				General struct {
+					Overview string `json:"overview"`
+				} `json:"general"`
+			} `json:"urls"`
+		} `json:"data"`
+	}
+	if err := c.do(ctx, http.MethodPost,
+		"/customers/"+customerID+"/portal-sessions", struct{}{}, &out); err != nil {
+		return "", err
+	}
+	return out.Data.URLs.General.Overview, nil
+}

admin/internal/paddle/webhook.go

@@ -0,0 +1,42 @@
+package paddle
+
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/hex"
+	"strings"
+)
+
+// VerifySignature checks a raw webhook body against the Paddle-Signature header.
+//
+// Paddle signs an HMAC-SHA256 over "ts:body", carried as "ts=<unix>;h1=<hex>".
+// It uses a constant-time compare and never logs the secret. A false return is
+// always a 401 with nothing processed — an unverified body could be anyone
+// claiming a subscription was paid for.
+func VerifySignature(secret, header string, body []byte) bool {
+	if secret == "" || header == "" {
+		return false
+	}
+	var ts, h1 string
+	for _, part := range strings.Split(header, ";") {
+		k, v, ok := strings.Cut(part, "=")
+		if !ok {
+			continue
+		}
+		switch k {
+		case "ts":
+			ts = v
+		case "h1":
+			h1 = v
+		}
+	}
+	if ts == "" || h1 == "" {
+		return false
+	}
+	mac := hmac.New(sha256.New, []byte(secret))
+	mac.Write([]byte(ts))
+	mac.Write([]byte(":"))
+	mac.Write(body)
+	want := hex.EncodeToString(mac.Sum(nil))
+	return hmac.Equal([]byte(want), []byte(h1))
+}

adminsite/.dockerignore

@@ -0,0 +1,4 @@
+node_modules
+.next
+.env
+*.lic

adminsite/.gitignore

@@ -0,0 +1,5 @@
+node_modules
+.next
+next-env.d.ts
+.env
+*.lic

adminsite/Dockerfile

@@ -0,0 +1,55 @@
+FROM node:26-alpine AS deps
+
+WORKDIR /app
+
+COPY package.json package-lock.json* ./
+RUN npm install
+
+FROM node:26-alpine AS builder
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+# Baked in at build time and must be reachable from the BROWSER, and present in
+# admin's ADMIN_ORIGIN. Wrong here means every request fails at runtime.
+ARG NEXT_PUBLIC_ADMIN_API_URL=http://localhost:8083
+ENV NEXT_PUBLIC_ADMIN_API_URL=$NEXT_PUBLIC_ADMIN_API_URL
+ARG NEXT_PUBLIC_ADMIN_ENV=production
+ENV NEXT_PUBLIC_ADMIN_ENV=$NEXT_PUBLIC_ADMIN_ENV
+
+# Browser checkout. The client token and environment are baked in, never
+# fetched, so a production build cannot load a sandbox token by accident.
+ARG NEXT_PUBLIC_PADDLE_CLIENT_TOKEN=
+ENV NEXT_PUBLIC_PADDLE_CLIENT_TOKEN=$NEXT_PUBLIC_PADDLE_CLIENT_TOKEN
+ARG NEXT_PUBLIC_PADDLE_ENV=sandbox
+ENV NEXT_PUBLIC_PADDLE_ENV=$NEXT_PUBLIC_PADDLE_ENV
+
+# Marketing site origin. Signup lives there (/start), not here; empty renders no
+# link at all rather than one that 404s.
+ARG NEXT_PUBLIC_SITE_URL=
+ENV NEXT_PUBLIC_SITE_URL=$NEXT_PUBLIC_SITE_URL
+
+RUN npm run build
+
+FROM node:26-alpine AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+
+RUN addgroup --system --gid 1001 nodejs && \
+    adduser --system --uid 1001 nextjs
+
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 3000
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+CMD ["node", "server.js"]

adminsite/app/(customer)/billing/page.tsx

@@ -0,0 +1,90 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { API_BASE, NotConnected, api } from "@/lib/api";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { PageFrame, RailCard, RailFacts } from "@/components/PageFrame";
+import { PageHeader } from "@/components/PageHeader";
+import { ManageBillingButton } from "@/components/ManageBillingButton";
+import { formatDate } from "@/lib/format";
+
+export default function BillingPage() {
+    const subs = useQuery({ queryKey: ["subscriptions"], queryFn: api.subscriptions });
+    const account = useQuery({ queryKey: ["account"], queryFn: api.account });
+
+    if (subs.error instanceof NotConnected) return <NotConnectedPanel url={API_BASE} />;
+    if (subs.isLoading) return <p className="text-ink-3">Loading…</p>;
+
+    const rows = subs.data ?? [];
+
+    // Each subscription names the instance it pays for, because tier and term
+    // are per-licence rather than per-account. Resolving the name here is the
+    // difference between "professional · annual" and knowing which install that is.
+    const nameFor = (instanceId?: string) => account.data?.instances.find((i) => i.instance_id === instanceId)?.name;
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Billing"
+                subtitle="One subscription per instance each carries its own tier and term."
+                record={account.data ? [{ key: "Billing", value: account.data.account.billing_email }] : undefined}
+            />
+
+            <PageFrame
+                aside={
+                    <>
+                        <RailCard title="Account">
+                            <RailFacts
+                                rows={[
+                                    {
+                                        label: "Billing contact",
+                                        value: account.data?.account.billing_email ?? "—",
+                                    },
+                                    { label: "Status", value: account.data?.account.status ?? "—" },
+                                    { label: "Subscriptions", value: rows.length },
+                                ]}
+                            />
+                        </RailCard>
+                        <RailCard title="Need a change?">
+                            <p className="text-[0.82rem] text-ink-2">Change a card, download an invoice or cancel from the billing portal. It covers every subscription on this account.</p>
+                            <ManageBillingButton />
+                            <p className="text-[0.82rem] text-ink-2">Anything else, email support.</p>
+                            <a href="mailto:support@hostxtra.co.uk" className="text-[0.82rem] font-semibold text-accent underline">
+                                support@hostxtra.co.uk
+                            </a>
+                        </RailCard>
+                    </>
+                }
+            >
+                {rows.length === 0 ? (
+                    <p className="rounded border border-rule bg-panel p-5 text-ink-2">You have no subscriptions. Cloud instances and self-hosted licences are both bought from the pricing page.</p>
+                ) : (
+                    <div className="overflow-x-auto rounded border border-rule bg-panel">
+                        <table className="w-full border-collapse text-left">
+                            <thead>
+                                <tr className="border-b border-rule bg-panel-2 font-mono text-[0.68rem] uppercase tracking-[0.1em] text-ink-3">
+                                    <th className="px-4 py-2.5 font-normal">Instance</th>
+                                    <th className="px-4 py-2.5 font-normal">Plan</th>
+                                    <th className="px-4 py-2.5 font-normal">Term</th>
+                                    <th className="px-4 py-2.5 font-normal">Status</th>
+                                    <th className="px-4 py-2.5 font-normal">Renews</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {rows.map((s) => (
+                                    <tr key={s.subscription_id} className="border-b border-rule-soft last:border-0">
+                                        <td className="px-4 py-3">{nameFor(s.instance_id) ?? <span className="text-ink-3">Not linked yet</span>}</td>
+                                        <td className="px-4 py-3">{s.tier.replace("_", " ")}</td>
+                                        <td className="px-4 py-3">{s.term}</td>
+                                        <td className="px-4 py-3">{s.status}</td>
+                                        <td className="px-4 py-3 font-mono tabular-nums">{formatDate(s.current_period_end)}</td>
+                                    </tr>
+                                ))}
+                            </tbody>
+                        </table>
+                    </div>
+                )}
+            </PageFrame>
+        </div>
+    );
+}

adminsite/app/(customer)/instances/[id]/page.tsx

@@ -0,0 +1,173 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useParams, useRouter } from "next/navigation";
+import { useState } from "react";
+import { API_BASE, ApiError, NotConnected, api } from "@/lib/api";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { LicenceDelivery } from "@/components/LicenceDelivery";
+import { MembersPanel } from "@/components/MembersPanel";
+import { RelinkPanel } from "@/components/RelinkPanel";
+import { StatePill } from "@/components/StatePill";
+import { PageFrame, RailCard, RailFacts } from "@/components/PageFrame";
+import { PageHeader } from "@/components/PageHeader";
+import { formatDate, licenceState, limitLabel } from "@/lib/format";
+import { featureLabel } from "@/lib/features";
+
+export default function InstancePage() {
+    const id = String(useParams().id);
+    const router = useRouter();
+    const qc = useQueryClient();
+    const [relinkError, setRelinkError] = useState<string | undefined>();
+
+    const account = useQuery({ queryKey: ["account"], queryFn: api.account });
+    const licence = useQuery({
+        queryKey: ["license", id],
+        queryFn: () => api.license(id),
+        retry: false,
+    });
+
+    const relink = useMutation({
+        mutationFn: (newId: string) => api.relink(id, newId),
+        onSuccess: (lic) => {
+            qc.invalidateQueries({ queryKey: ["account"] });
+            router.replace(`/instances/${lic.instance_id}`);
+        },
+        onError: (err) =>
+            setRelinkError(err instanceof ApiError ? err.message : "Relink failed. Try again."),
+    });
+
+    if (account.error instanceof NotConnected) return <NotConnectedPanel url={API_BASE} />;
+
+    const instance = account.data?.instances.find((i) => i.instance_id === id);
+    if (account.isLoading) return <p className="text-ink-3">Loading…</p>;
+    if (!instance) {
+        // Says "not on your account" rather than "does not exist": the backend
+        // answers 404 for another account's instance, and confirming existence
+        // here would undo that.
+        return <p className="text-ink-2">That instance is not on your account.</p>;
+    }
+
+    const lic = licence.data;
+    const state = licenceState(lic?.expires_at, Boolean(lic));
+    const cloud = instance.deployment === "cloud";
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                back={{ href: "/", label: "Overview" }}
+                title={instance.name || "Unnamed instance"}
+                subtitle={`${cloud ? "Cloud" : "Self-hosted"}${
+                    instance.tier ? ` · ${instance.tier.replace("_", " ")}` : ""
+                } · created ${formatDate(instance.created_at)}`}
+                record={[
+                    { key: "Instance", value: instance.instance_id, copy: true },
+                    ...(lic ? [{ key: "Licence", value: lic.license_id, copy: true }] : []),
+                ]}
+                status={<StatePill state={state} />}
+            />
+
+            <PageFrame
+                aside={
+                    <>
+                        <RailCard title="Licence">
+                            {lic ? (
+                                <RailFacts
+                                    rows={[
+                                        { label: "Tier", value: lic.tier.replace("_", " ") },
+                                        { label: "Issued", value: formatDate(lic.issued_at) },
+                                        { label: "Expires", value: formatDate(lic.expires_at) },
+                                        { label: "Reason", value: lic.reason },
+                                    ]}
+                                />
+                            ) : (
+                                <p className="text-[0.82rem] text-ink-2">
+                                    No licence issued yet.
+                                </p>
+                            )}
+                        </RailCard>
+
+                        {lic && (
+                            <RailCard title="Included">
+                                <RailFacts
+                                    rows={[
+                                        {
+                                            label: "Servers",
+                                            value: limitLabel(lic.limits.max_servers),
+                                        },
+                                        {
+                                            label: "Secret groups",
+                                            value: limitLabel(lic.limits.max_secret_groups),
+                                        },
+                                        {
+                                            label: "Channels",
+                                            value: limitLabel(lic.limits.max_channels),
+                                        },
+                                        {
+                                            label: "Features",
+                                            // Labelled, not raw keys: this is
+                                            // the customer's own licence, and
+                                            // "vuln_scanning" is not a name
+                                            // anyone bought.
+                                            value: lic.features.map(featureLabel).join(", ") || "none",
+                                        },
+                                    ]}
+                                />
+                            </RailCard>
+                        )}
+
+                        {!cloud && (
+                            <RailCard title="Moves">
+                                <RailFacts
+                                    rows={[
+                                        {
+                                            label: "Relinks used",
+                                            value: `${instance.relink_count} of ${
+                                                account.data?.max_relinks ?? 3
+                                            }`,
+                                        },
+                                    ]}
+                                />
+                                <p className="text-[0.82rem] text-ink-2">
+                                    Moving a licence to a different install counts as one.
+                                </p>
+                            </RailCard>
+                        )}
+                    </>
+                }
+            >
+                {cloud ? (
+                    <MembersPanel instanceId={instance.instance_id} />
+                ) : (
+                    <p className="rounded border border-rule bg-panel p-5 text-ink-2">
+                        Users for this install are managed inside it, in Settings → Instance. We do
+                        not have access to your own deployment.
+                    </p>
+                )}
+
+                {lic && !cloud && (
+                    <>
+                        <LicenceDelivery
+                            instanceId={instance.instance_id}
+                            blob={lic.blob ?? ""}
+                            downloadUrl={api.licenseBlobUrl(instance.instance_id)}
+                        />
+                        <RelinkPanel
+                            instanceId={instance.instance_id}
+                            used={instance.relink_count}
+                            max={account.data?.max_relinks ?? 3}
+                            error={relinkError}
+                            onRelink={(newId) => relink.mutate(newId)}
+                        />
+                    </>
+                )}
+
+                {!lic && (
+                    <p className="rounded border border-rule bg-panel p-5 text-ink-2">
+                        No licence has been issued for this instance yet.
+                    </p>
+                )}
+            </PageFrame>
+        </div>
+    );
+}

adminsite/app/(customer)/instances/link/LinkForm.tsx

@@ -0,0 +1,74 @@
+"use client";
+
+import { useState } from "react";
+import { ApiError, NotConnected, api } from "@/lib/api";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+
+const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+
+export function LinkForm({
+    onLinked,
+    claimId,
+}: {
+    onLinked: (instanceId: string) => void;
+    // The PAID placeholder awaiting its real install UUID: claim it in place. The
+    // name was chosen at checkout, so it is not asked for again. Self-hosted Free
+    // is created on the purchase page instead, not here.
+    claimId: string;
+}) {
+    const [id, setId] = useState("");
+    const [error, setError] = useState<string | undefined>();
+    const [busy, setBusy] = useState(false);
+
+    async function submit(e: React.FormEvent) {
+        e.preventDefault();
+        const value = id.trim();
+
+        // Checked here so a typo costs nothing and the message is instant.
+        if (!UUID_RE.test(value)) {
+            setError(
+                "That does not look like an instance ID. It should look like the example below.",
+            );
+            return;
+        }
+
+        setBusy(true);
+        setError(undefined);
+        try {
+            const inst = await api.claimLink(claimId, value);
+            onLinked(inst.instance_id);
+        } catch (err) {
+            setError(
+                err instanceof NotConnected
+                    ? "The licensing service is not reachable from this page."
+                    : err instanceof ApiError
+                      ? err.message
+                      : "Could not link that instance. Try again.",
+            );
+        } finally {
+            setBusy(false);
+        }
+    }
+
+    return (
+        <form onSubmit={submit} className="grid gap-4" noValidate>
+            <Field
+                label="Instance ID"
+                value={id}
+                onChange={(e) => setId(e.target.value)}
+                error={error}
+                hint={
+                    <>
+                        Find this on your install&rsquo;s <code>Settings → Licence</code> page, or on
+                        the setup screen just after you first sign in. It looks like{" "}
+                        <code>6a0fe3f0-49d2-4aa1-967c-a3094b200b5d</code>.
+                    </>
+                }
+            />
+            <Button type="submit" disabled={busy} className="justify-self-start">
+                {busy ? "Linking…" : "Link and issue licence"}
+            </Button>
+        </form>
+    );
+}

adminsite/app/(customer)/instances/link/page.tsx

@@ -0,0 +1,41 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter, useSearchParams } from "next/navigation";
+import { useQueryClient } from "@tanstack/react-query";
+import { LinkForm } from "./LinkForm";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function LinkPage() {
+    const router = useRouter();
+    const qc = useQueryClient();
+    // This page only claims a PAID placeholder's real install UUID. Self-hosted
+    // Free is created on the purchase page, so with no placeholder to claim there
+    // is nothing to do here send them there.
+    const claimId = useSearchParams().get("claim") ?? undefined;
+
+    useEffect(() => {
+        if (!claimId) router.replace("/purchase");
+    }, [claimId, router]);
+
+    if (!claimId) return null;
+
+    return (
+        <div className="grid max-w-2xl gap-6">
+            <PageHeader
+                back={{ href: "/", label: "Overview" }}
+                title="Link an install"
+                subtitle="Every licence is tied to one install, so we need its ID before we can issue yours. Paste it below and your licence is ready on the next screen."
+            />
+            <LinkForm
+                claimId={claimId}
+                onLinked={(instanceId) => {
+                    qc.invalidateQueries({ queryKey: ["account"] });
+                    // Straight to the download, not back to a list: the licence is
+                    // the thing they came for.
+                    router.push(`/instances/${instanceId}`);
+                }}
+            />
+        </div>
+    );
+}

adminsite/app/(customer)/layout.tsx

@@ -0,0 +1,35 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { api } from "@/lib/api";
+import { RequireKind } from "@/lib/session";
+import { AppBar, type NavLink } from "@/components/AppBar";
+
+/*
+ * Three destinations, not five. Settings moved into the account menu it is
+ * your password, not a place and Instances went with it, because Overview
+ * already lists them and a second door to the same room is just a second thing
+ * to keep in sync. Linking an install is an action, so it is a button on
+ * Overview rather than a permanent nav entry.
+ */
+const LINKS: NavLink[] = [
+    { href: "/", label: "Overview" },
+    { href: "/users", label: "People" },
+    { href: "/billing", label: "Billing" },
+];
+
+function AccountName() {
+    // Shares the ["account"] key with Overview, so this costs no extra request.
+    const { data } = useQuery({ queryKey: ["account"], queryFn: api.account });
+    if (!data) return null;
+    return <span className="block truncate text-[0.92rem] font-bold tracking-[-0.01em]">{data.account.name}</span>;
+}
+
+export default function CustomerLayout({ children }: { children: React.ReactNode }) {
+    return (
+        <RequireKind kind="customer">
+            <AppBar links={LINKS} context={<AccountName />} />
+            <main className="mx-auto max-w-rail px-5 py-7">{children}</main>
+        </RequireKind>
+    );
+}

adminsite/app/(customer)/page.tsx

@@ -0,0 +1,169 @@
+"use client";
+
+import { useQueries, useQuery } from "@tanstack/react-query";
+import Link from "next/link";
+import { API_BASE, NotConnected, api, type License } from "@/lib/api";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { InstanceRecord } from "@/components/InstanceRecord";
+import { PageFrame, RailCard, RailFacts } from "@/components/PageFrame";
+import { PageHeader } from "@/components/PageHeader";
+import { LinkButton } from "@/components/Button";
+import { StatePill } from "@/components/StatePill";
+import { daysRemaining, formatDate, licenceState } from "@/lib/format";
+
+export default function OverviewPage() {
+    const { data, error, isLoading } = useQuery({ queryKey: ["account"], queryFn: api.account });
+    const people = useQuery({ queryKey: ["account-users"], queryFn: api.accountUsers });
+
+    const licences = useQueries({
+        queries: (data?.instances ?? [])
+            .filter((i) => i.current_license)
+            .map((i) => ({
+                queryKey: ["license", i.instance_id],
+                queryFn: () => api.license(i.instance_id),
+            })),
+    });
+
+    if (error instanceof NotConnected) return <NotConnectedPanel url={API_BASE} />;
+    if (isLoading || !data) return <p className="text-ink-3">Loading your account…</p>;
+
+    const byInstance = new Map<string, License>();
+    licences.forEach((q) => {
+        if (q.data) byInstance.set(q.data.instance_id, q.data);
+    });
+
+    const live = data.instances.filter((i) => i.status !== "deleted");
+
+    // Work the customer has to do, gathered across every instance. This is the
+    // only account-level view of it each record only knows about itself.
+    const attention = live.flatMap((i) => {
+        const lic = byInstance.get(i.instance_id);
+        const state = licenceState(lic?.expires_at, Boolean(lic));
+        if (state === "none") return [{ id: i.instance_id, text: `${i.name || "An instance"} is not linked`, note: "" }];
+        if (state === "expired") return [{ id: i.instance_id, text: `${i.name} has expired`, note: "now" }];
+        if (state === "warn")
+            return [
+                {
+                    id: i.instance_id,
+                    text: `${i.name} expires`,
+                    note: `${daysRemaining(lic!.expires_at)}d`,
+                },
+            ];
+        return [];
+    });
+
+    const pending = (people.data ?? []).filter((p) => !p.verified_at).length;
+
+    const subtitle =
+        live.length === 0 ? "Nothing here yet." : `${live.length} ${live.length === 1 ? "instance" : "instances"}${attention.length ? ` · ${attention.length} needing attention` : " · all licensed"}`;
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Overview"
+                subtitle={subtitle}
+                actions={live.length > 0 ? <LinkButton href="/purchase">Buy a plan</LinkButton> : undefined}
+                record={[
+                    { key: "Account", value: data.account.account_id, copy: true },
+                    { key: "Billing", value: data.account.billing_email },
+                ]}
+                status={attention.length === 0 && live.length > 0 ? <StatePill state="valid" /> : undefined}
+            />
+
+            {live.length === 0 ? (
+                <div className="grid max-w-xl gap-3 rounded border border-rule bg-panel p-5">
+                    <h2 className="text-xl">No instances yet</h2>
+                    <p className="text-ink-2">
+                        Create a free cloud instance and we host it, with your licence applied automatically. Or run Vantage on your own server and get its licence free or paid from the purchase page.
+                    </p>
+                    <div className="flex flex-wrap gap-2.5">
+                        <LinkButton href="/purchase">Buy a plan</LinkButton>
+                    </div>
+                </div>
+            ) : (
+                <PageFrame
+                    aside={
+                        <>
+                            {attention.length > 0 && (
+                                <RailCard title="Needs you" count={attention.length}>
+                                    <ul className="grid gap-2">
+                                        {attention.map((a) => (
+                                            <li key={a.id} className="flex items-center justify-between gap-2.5 text-[0.82rem] text-ink-2">
+                                                <span>{a.text}</span>
+                                                {a.note && <span className="font-mono text-[0.64rem] uppercase tracking-[0.08em] text-warn">{a.note}</span>}
+                                            </li>
+                                        ))}
+                                    </ul>
+                                </RailCard>
+                            )}
+
+                            <RailCard title="Your team" count={people.data?.length}>
+                                <ul className="grid gap-2">
+                                    {(people.data ?? []).slice(0, 5).map((p) => (
+                                        <li key={p.user_id} className="flex items-center justify-between gap-2.5 text-[0.82rem] text-ink-2">
+                                            <span className="truncate">{p.email}</span>
+                                            <span className="shrink-0 font-mono text-[0.64rem] uppercase tracking-[0.08em] text-ink-3">{p.account_role}</span>
+                                        </li>
+                                    ))}
+                                </ul>
+                                {pending > 0 && (
+                                    <p className="border-t border-rule-soft pt-2 text-[0.78rem] text-warn">
+                                        {pending} {pending === 1 ? "invitation" : "invitations"} not accepted yet
+                                    </p>
+                                )}
+                                <Link href="/users" className="text-[0.82rem] font-semibold text-accent underline">
+                                    Manage people
+                                </Link>
+                            </RailCard>
+
+                            {/*
+                             * Account-level facts only. Tier, limits and renewal date
+                             * belong to a licence, and a licence belongs to one
+                             * instance an account holding a Free cloud instance and
+                             * a Professional self-hosted one has no single plan.
+                             */}
+                            <RailCard title="Account">
+                                <RailFacts
+                                    rows={[
+                                        { label: "Billing contact", value: data.account.billing_email },
+                                        { label: "Status", value: data.account.status },
+                                        {
+                                            label: "Customer since",
+                                            value: formatDate(data.account.created_at),
+                                        },
+                                    ]}
+                                />
+                                <Link href="/billing" className="text-[0.82rem] font-semibold text-accent underline">
+                                    Billing history
+                                </Link>
+                            </RailCard>
+
+                            <RailCard title="Running Vantage yourself?">
+                                <p className="text-[0.82rem] text-ink-2">Get a licence for your own install free or paid from the purchase page. It keeps its own users.</p>
+                                <Link href="/purchase" className="text-[0.82rem] font-semibold text-accent underline">
+                                    Get a licence
+                                </Link>
+                            </RailCard>
+                        </>
+                    }
+                >
+                    {live.map((i, n) => {
+                        const lic = byInstance.get(i.instance_id);
+                        const state = licenceState(lic?.expires_at, Boolean(lic));
+                        return (
+                            <InstanceRecord
+                                key={i.instance_id}
+                                instance={i}
+                                license={lic}
+                                // Open when it is the only one, or when it is the
+                                // first thing that needs a decision. A saved toggle
+                                // beats this from then on.
+                                defaultOpen={live.length === 1 || (state !== "valid" && attention[0]?.id === i.instance_id) || (attention.length === 0 && n === 0)}
+                            />
+                        );
+                    })}
+                </PageFrame>
+            )}
+        </div>
+    );
+}

adminsite/app/(customer)/purchase/PurchaseForm.tsx

@@ -0,0 +1,785 @@
+"use client";
+
+import { useEffect, useMemo, useState } from "react";
+import { useRouter } from "next/navigation";
+import Link from "next/link";
+import { useMutation, useQuery } from "@tanstack/react-query";
+import { ApiError, api, lineItemsFor, type CatalogueRow, type CheckoutOptions, type Deployment, type Plan, type Term, type Tier } from "@/lib/api";
+import { initPaddle, previewPrices, type PricePreview } from "@/lib/paddle";
+import { featureDesc, featureLabel } from "@/lib/features";
+
+/* Tiers in the order a customer reads them, cheapest first. */
+const TIER_ORDER: Tier[] = ["free", "professional", "enterprise"];
+
+const UUID_RE = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+
+/* Feature wording lives in lib/features.ts, shared with the staff
+ * configurator. It was duplicated here and there, and the two copies had
+ * already drifted. */
+
+interface Choice {
+    tier: Tier;
+    term: Term;
+    servers: number;
+    features: string[];
+}
+
+/* What a plan offers a given feature: included in the base, a paid add-on, or
+ * absent. Drives both the tier cards and the configurator toggles. */
+type FeatureState = "included" | "addon" | "absent";
+
+function featureStateFor(plan: Plan | undefined, rows: CatalogueRow[], env: string, term: Term, key: string): FeatureState {
+    if (plan?.base_features.includes(key)) return "included";
+    const row = rows.find((r) => r.kind === "feature" && r.feature_key === key);
+    const priced = Boolean(row?.price_ids?.[env]?.[term]);
+    return priced ? "addon" : "absent";
+}
+
+export function PurchaseForm() {
+    const router = useRouter();
+    const account = useQuery({ queryKey: ["account"], queryFn: api.account });
+    const optionsQ = useQuery({ queryKey: ["checkout-options"], queryFn: api.checkoutOptions });
+
+    const [dep, setDep] = useState<Deployment>("cloud");
+    const [choice, setChoice] = useState<Choice>({
+        tier: "professional",
+        term: "annual",
+        servers: 3,
+        features: [],
+    });
+    const [name, setName] = useState("");
+    const [error, setError] = useState<string | null>(null);
+
+    // Follow-up phase after a checkout has been started.
+    const [pending, setPending] = useState<null | {
+        instanceId: string;
+        deployment: Deployment;
+    }>(null);
+    const [uuid, setUuid] = useState("");
+
+    const options = optionsQ.data;
+    const accountId = account.data?.account.account_id ?? "";
+
+    // Distinct feature keys offered on this deployment, in a stable order.
+    const featureKeys = useMemo(() => {
+        if (!options) return [] as string[];
+        const keys = new Set<string>();
+        for (const r of options.catalogue) {
+            if (r.deployment === dep && r.kind === "feature" && r.feature_key) {
+                keys.add(r.feature_key);
+            }
+        }
+        return [...keys];
+    }, [options, dep]);
+
+    const activePlans = useMemo(() => (options?.plans ?? []).filter((p) => p.deployment === dep && p.active).sort((a, b) => TIER_ORDER.indexOf(a.tier) - TIER_ORDER.indexOf(b.tier)), [options, dep]);
+    const plan = activePlans.find((p) => p.tier === choice.tier);
+    const baseServers = plan?.base_limits.max_servers ?? 0;
+    const unlimited = baseServers === -1;
+
+    const rows = useMemo(() => (options?.catalogue ?? []).filter((r) => r.deployment === dep && r.tier === choice.tier), [options, dep, choice.tier]);
+
+    // Real line items for the current configuration the same builder the
+    // checkout uses, so the summary can never disagree with the overlay.
+    const items = useMemo(() => (options ? lineItemsFor(options, choice, dep) : []), [options, choice, dep]);
+
+    // Real, localised prices from Paddle for those items.
+    const [receiptPrice, setReceiptPrice] = useState<PricePreview | null>(null);
+    useEffect(() => {
+        let live = true;
+        previewPrices(items).then((p) => {
+            if (live) setReceiptPrice(p);
+        });
+        return () => {
+            live = false;
+        };
+    }, [items]);
+
+    // A headline "base" price per tier, all previewed in one call.
+    const [basePrices, setBasePrices] = useState<Record<string, string>>({});
+    useEffect(() => {
+        if (!options) return;
+        const baseItems: { priceId: string; quantity: number; tier: Tier }[] = [];
+        for (const p of activePlans) {
+            const row = options.catalogue.find((r) => r.deployment === dep && r.tier === p.tier && r.kind === "base");
+            const id = row?.price_ids?.[options.env]?.[choice.term];
+            if (id) baseItems.push({ priceId: id, quantity: 1, tier: p.tier });
+        }
+        let live = true;
+        previewPrices(baseItems.map(({ priceId, quantity }) => ({ priceId, quantity }))).then((p) => {
+            if (!live) return;
+            const next: Record<string, string> = {};
+            if (p) {
+                for (const bi of baseItems) {
+                    const line = p.lines[bi.priceId];
+                    if (line) next[bi.tier] = line.total;
+                }
+            }
+            setBasePrices(next);
+        });
+        return () => {
+            live = false;
+        };
+    }, [options, dep, choice.term, activePlans]);
+
+    // --- actions -----------------------------------------------------------
+
+    const createFree = useMutation({
+        mutationFn: () => api.createInstance(name.trim()),
+        onSuccess: () => router.push("/"),
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Could not create the instance."),
+    });
+
+    // Self-hosted Free binds to the install's own UUID: register the instance,
+    // then issue its Free licence in one action.
+    const createSelfHostedFree = useMutation({
+        mutationFn: async () => {
+            const inst = await api.link(uuid.trim(), name.trim());
+            await api.claimFree(inst.instance_id);
+            return inst.instance_id;
+        },
+        onSuccess: (id) => router.push(`/instances/${id}`),
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Could not create the licence."),
+    });
+
+    const startCheckout = useMutation({
+        mutationFn: async () => {
+            const trimmed = name.trim();
+            const r = dep === "cloud" ? await api.createCloudCheckout(trimmed) : await api.createSelfHosted(trimmed);
+            return r.instance_id;
+        },
+        onSuccess: async (instanceId) => {
+            setPending({ instanceId, deployment: dep });
+            const paddle = await initPaddle();
+            paddle?.Checkout.open({
+                items: items.map((i) => ({ priceId: i.priceId, quantity: i.quantity })),
+                customData: { account_id: accountId, instance_id: instanceId },
+            });
+        },
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Could not start checkout."),
+    });
+
+    const claim = useMutation({
+        mutationFn: () => api.claimLink(pending!.instanceId, uuid.trim()),
+        onSuccess: () => router.push("/"),
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Could not link the install."),
+    });
+
+    if (optionsQ.isLoading || account.isLoading) {
+        return <p className="text-ink-3">Loading plans…</p>;
+    }
+    if (!options) {
+        return <p className="text-ink-2">Plans are unavailable right now. Try again shortly.</p>;
+    }
+
+    const selfHostedFree = dep === "self_hosted" && choice.tier === "free";
+    const cloudFree = dep === "cloud" && choice.tier === "free";
+    const paid = choice.tier !== "free";
+
+    return (
+        <div className="grid items-start gap-6 lg:grid-cols-[minmax(0,1fr)_340px]">
+            {/* ---- main column ---- */}
+            <div className="grid min-w-0 gap-6">
+                <Block n={1} label="Deployment">
+                    <Seg
+                        value={dep}
+                        onChange={(v) => {
+                            const next = v as Deployment;
+                            setDep(next);
+                            // Self-hosted sells annual only; clamp the term.
+                            setChoice((c) => ({
+                                ...c,
+                                term: next === "self_hosted" ? "annual" : c.term,
+                            }));
+                        }}
+                        options={[
+                            {
+                                value: "cloud",
+                                icon: cloudIcon,
+                                title: "Cloud",
+                                sub: "We host and manage it · monthly or annual",
+                            },
+                            {
+                                value: "self_hosted",
+                                icon: serverIcon,
+                                title: "Self-hosted",
+                                sub: "Runs on your own servers · annual only",
+                            },
+                        ]}
+                    />
+                </Block>
+
+                {dep === "cloud" && (
+                    <Block n={2} label="Billing">
+                        <Seg
+                            value={choice.term}
+                            onChange={(v) => setChoice((c) => ({ ...c, term: v as Term }))}
+                            options={[
+                                {
+                                    value: "monthly",
+                                    icon: calendarIcon,
+                                    title: "Monthly",
+                                    sub: "Pay as you go · cancel anytime",
+                                },
+                                {
+                                    value: "annual",
+                                    icon: annualIcon,
+                                    title: "Annual",
+                                    sub: "2 months free vs monthly",
+                                },
+                            ]}
+                        />
+                    </Block>
+                )}
+
+                <Block n={dep === "cloud" ? 3 : 2} label="Plan">
+                    <div className="grid gap-3 sm:grid-cols-3">
+                        {activePlans.map((p) => (
+                            <TierCard
+                                key={p.tier}
+                                plan={p}
+                                selected={p.tier === choice.tier}
+                                headline={p.tier === "free" ? "£0" : basePrices[p.tier]}
+                                cycleLabel={cycleShort(dep, choice.term)}
+                                featureKeys={featureKeys}
+                                catalogue={options.catalogue.filter((r) => r.deployment === dep && r.tier === p.tier)}
+                                env={options.env}
+                                term={choice.term}
+                                onSelect={() =>
+                                    setChoice((c) => ({
+                                        ...c,
+                                        tier: p.tier,
+                                        // Moving tier moves the floor; clamp up.
+                                        servers: Math.max(c.servers, p.base_limits.max_servers === -1 ? c.servers : p.base_limits.max_servers),
+                                        // Drop add-ons the new tier does not sell.
+                                        features: c.features.filter((k) => {
+                                            const st = featureStateFor(
+                                                p,
+                                                options.catalogue.filter((r) => r.deployment === dep && r.tier === p.tier),
+                                                options.env,
+                                                c.term,
+                                                k,
+                                            );
+                                            return st === "addon";
+                                        }),
+                                    }))
+                                }
+                            />
+                        ))}
+                    </div>
+                </Block>
+
+                {paid && (
+                    <Block n={dep === "cloud" ? 4 : 3} label="Configure">
+                        <div className="rounded border border-rule bg-panel p-4">
+                            {/* servers */}
+                            <Row title="Managed servers" desc={unlimited ? "Unlimited servers included in this plan" : `${baseServers} included`}>
+                                {unlimited ? (
+                                    <span className="text-[0.72rem] font-semibold uppercase tracking-[0.06em] text-valid">Unlimited</span>
+                                ) : (
+                                    <Stepper value={choice.servers} min={baseServers} max={500} onChange={(servers) => setChoice((c) => ({ ...c, servers }))} />
+                                )}
+                            </Row>
+
+                            {/* features */}
+                            {featureKeys.map((key) => {
+                                const st = featureStateFor(plan, rows, options.env, choice.term, key);
+                                return (
+                                    <Row key={key} title={featureLabel(key)} desc={featureDesc(key)} dim={st === "absent"}>
+                                        {st === "included" ? (
+                                            <span className="text-[0.72rem] font-semibold uppercase tracking-[0.06em] text-valid">Included</span>
+                                        ) : st === "absent" ? (
+                                            <span className="font-mono text-[0.76rem] text-ink-3">Not in this plan</span>
+                                        ) : (
+                                            <Toggle
+                                                checked={choice.features.includes(key)}
+                                                onChange={(on) =>
+                                                    setChoice((c) => ({
+                                                        ...c,
+                                                        features: on ? [...c.features, key] : c.features.filter((f) => f !== key),
+                                                    }))
+                                                }
+                                            />
+                                        )}
+                                    </Row>
+                                );
+                            })}
+                        </div>
+                    </Block>
+                )}
+
+                {selfHostedFree && (
+                    <Block n={3} label="Your install">
+                        <div className="grid gap-3 rounded border border-rule bg-panel p-4">
+                            <p className="text-[0.86rem] text-ink-2">
+                                Install Vantage on your own server first, then paste the instance ID it reports. We register it and issue your Free licence nothing to pay.
+                            </p>
+                            <label className="grid gap-1">
+                                <span className="text-[0.72rem] font-semibold uppercase tracking-[0.08em] text-ink-3">Instance ID</span>
+                                <input
+                                    value={uuid}
+                                    onChange={(e) => setUuid(e.target.value)}
+                                    placeholder="00000000-0000-0000-0000-000000000000"
+                                    className="rounded border border-rule bg-panel px-2.5 py-2 font-mono text-[0.82rem] text-ink placeholder:text-ink-3"
+                                />
+                                <span className="text-[0.72rem] text-ink-3">Find this on your install&rsquo;s Settings → Licence page, or the setup screen just after first sign-in.</span>
+                            </label>
+                        </div>
+                    </Block>
+                )}
+            </div>
+
+            {/* ---- receipt rail ---- */}
+            <aside className="lg:sticky lg:top-5">
+                <div className="overflow-hidden rounded-[14px] border border-rule bg-panel shadow-[var(--shadow)]">
+                    <div className="flex items-center justify-between border-b border-rule-soft px-4 py-3.5">
+                        <h3 className="text-[0.95rem] font-semibold">Order summary</h3>
+                        <span className="rounded border border-rule px-1.5 py-0.5 font-mono text-[0.62rem] uppercase tracking-[0.07em] text-ink-3">{dep === "cloud" ? "Cloud" : "Self-hosted"}</span>
+                    </div>
+
+                    <Receipt options={options} dep={dep} choice={choice} plan={plan} items={items} price={receiptPrice} />
+
+                    {/* name + CTA */}
+                    <div className="grid gap-3 border-t border-rule px-4 py-4">
+                        {!pending && (
+                            <label className="grid gap-1">
+                                <span className="text-[0.72rem] font-semibold uppercase tracking-[0.08em] text-ink-3">Instance name</span>
+                                <input
+                                    value={name}
+                                    onChange={(e) => setName(e.target.value)}
+                                    placeholder="Northgate Systems"
+                                    className="rounded border border-rule bg-panel px-2.5 py-2 text-[0.9rem] text-ink placeholder:text-ink-3"
+                                />
+                            </label>
+                        )}
+
+                        {error && <p className="text-[0.82rem] text-expired">{error}</p>}
+
+                        {/* Phase A: choose an action for the configuration. */}
+                        {!pending &&
+                            (selfHostedFree ? (
+                                <Cta
+                                    label={createSelfHostedFree.isPending ? "Creating…" : "Create licence"}
+                                    variant="line"
+                                    disabled={!UUID_RE.test(uuid.trim()) || createSelfHostedFree.isPending}
+                                    onClick={() => {
+                                        setError(null);
+                                        createSelfHostedFree.mutate();
+                                    }}
+                                />
+                            ) : cloudFree ? (
+                                <Cta
+                                    label={createFree.isPending ? "Creating…" : "Create free instance"}
+                                    variant="line"
+                                    disabled={!name.trim() || createFree.isPending}
+                                    onClick={() => {
+                                        setError(null);
+                                        createFree.mutate();
+                                    }}
+                                />
+                            ) : (
+                                <Cta
+                                    label={startCheckout.isPending ? "Starting…" : "Continue to payment"}
+                                    disabled={!name.trim() || items.length === 0 || !accountId || startCheckout.isPending}
+                                    onClick={() => {
+                                        setError(null);
+                                        startCheckout.mutate();
+                                    }}
+                                />
+                            ))}
+
+                        {/* Phase B: after the checkout has been opened. */}
+                        {pending?.deployment === "self_hosted" && (
+                            <div className="grid gap-2 border-t border-rule-soft pt-3">
+                                <p className="text-[0.8rem] text-ink-2">Once payment clears, paste the instance ID your install reports (Settings → Licence) to receive your licence.</p>
+                                <input
+                                    value={uuid}
+                                    onChange={(e) => setUuid(e.target.value)}
+                                    placeholder="00000000-0000-0000-0000-000000000000"
+                                    className="rounded border border-rule bg-panel px-2.5 py-2 font-mono text-[0.82rem] text-ink placeholder:text-ink-3"
+                                />
+                                <Cta
+                                    label={claim.isPending ? "Linking…" : "Link and issue licence"}
+                                    disabled={!uuid.trim() || claim.isPending}
+                                    onClick={() => {
+                                        setError(null);
+                                        claim.mutate();
+                                    }}
+                                />
+                            </div>
+                        )}
+                        {pending?.deployment === "cloud" && (
+                            <div className="grid gap-2 border-t border-rule-soft pt-3">
+                                <p className="text-[0.8rem] text-ink-2">Your instance is being set up. Its licence appears the moment payment clears no further steps.</p>
+                                <Link href={`/instances/${pending.instanceId}`} className="font-semibold text-accent underline">
+                                    Go to your instance
+                                </Link>
+                            </div>
+                        )}
+                    </div>
+
+                    <div className="flex items-start gap-2 border-t border-rule-soft px-4 py-3 text-[0.72rem] text-ink-3">
+                        <LockIcon />
+                        <span>{paid ? "Secure checkout by Paddle, our reseller of record. VAT is added at checkout where applicable." : "No payment details required for the Free plan."}</span>
+                    </div>
+                </div>
+            </aside>
+        </div>
+    );
+}
+
+// ---------------------------------------------------------------------------
+// Presentational pieces
+// ---------------------------------------------------------------------------
+
+function cycleShort(dep: Deployment, term: Term) {
+    return dep === "cloud" ? (term === "annual" ? "/yr" : "/mo") : "/yr";
+}
+
+function Block({ n, label, children }: { n: number; label: string; children: React.ReactNode }) {
+    return (
+        <section className="grid gap-2.5">
+            <h2 className="flex items-center gap-2 text-[0.72rem] font-bold uppercase tracking-[0.1em] text-ink-3">
+                <span className="font-mono text-accent">{n}</span>
+                {label}
+            </h2>
+            {children}
+        </section>
+    );
+}
+
+interface SegOption {
+    value: string;
+    icon: React.ReactNode;
+    title: string;
+    sub: string;
+}
+
+function Seg({ value, onChange, options }: { value: string; onChange: (v: string) => void; options: SegOption[] }) {
+    return (
+        <div className="flex gap-1 rounded-[9px] border border-rule bg-panel-2 p-1">
+            {options.map((o) => {
+                const on = o.value === value;
+                return (
+                    <button
+                        key={o.value}
+                        type="button"
+                        aria-pressed={on}
+                        onClick={() => onChange(o.value)}
+                        className={`flex flex-1 items-center gap-3 rounded-[7px] px-4 py-3 text-left transition-colors ${on ? "bg-panel text-ink shadow-[var(--shadow)]" : "text-ink-2"}`}
+                    >
+                        <span
+                            className={`grid h-[34px] w-[34px] flex-none place-items-center rounded-lg border ${
+                                on ? "border-accent/40 bg-accent-wash text-accent" : "border-rule bg-panel text-ink-3"
+                            }`}
+                        >
+                            {o.icon}
+                        </span>
+                        <span className="flex flex-col leading-tight">
+                            <span className="text-[0.92rem] font-bold">{o.title}</span>
+                            <span className={`text-[0.72rem] font-medium ${on ? "text-accent" : "text-ink-3"}`}>{o.sub}</span>
+                        </span>
+                        <span className={`relative ml-auto h-[18px] w-[18px] flex-none rounded-full border-2 ${on ? "border-accent bg-accent" : "border-rule"}`}>
+                            {on && <span className="absolute inset-[3px] rounded-full bg-accent-ink" />}
+                        </span>
+                    </button>
+                );
+            })}
+        </div>
+    );
+}
+
+function TierCard({
+    plan,
+    selected,
+    headline,
+    cycleLabel,
+    featureKeys,
+    catalogue,
+    env,
+    term,
+    onSelect,
+}: {
+    plan: Plan;
+    selected: boolean;
+    headline?: string;
+    cycleLabel: string;
+    featureKeys: string[];
+    catalogue: CatalogueRow[];
+    env: string;
+    term: Term;
+    onSelect: () => void;
+}) {
+    const base = plan.base_limits.max_servers;
+    const servers = base === -1 ? "Unlimited servers" : `${base} server${base === 1 ? "" : "s"} included`;
+    return (
+        <button
+            type="button"
+            aria-pressed={selected}
+            onClick={onSelect}
+            className={`relative flex flex-col gap-3 rounded-xl border bg-panel p-4 text-left transition-[border-color,box-shadow] ${
+                selected ? "border-accent shadow-[0_0_0_1px_var(--accent)]" : "border-rule hover:border-accent/50"
+            }`}
+        >
+            {plan.tier === "professional" && (
+                <span className="absolute -top-2 right-3 rounded-full bg-accent px-2 py-0.5 text-[0.6rem] font-bold uppercase tracking-[0.08em] text-accent-ink">Most popular</span>
+            )}
+            <span className="flex items-center justify-between gap-2">
+                <span className="text-[1.05rem] font-extrabold tracking-[-0.02em]">{plan.name}</span>
+                <span className={`relative h-4 w-4 flex-none rounded-full border-2 ${selected ? "border-accent bg-accent" : "border-rule"}`}>
+                    {selected && <span className="absolute inset-[3px] rounded-full bg-accent-ink" />}
+                </span>
+            </span>
+            <span className="flex items-baseline gap-1">
+                <span className="text-[1.5rem] font-extrabold tracking-[-0.03em] tabular-nums">{headline ?? "—"}</span>
+                <span className="text-[0.72rem] text-ink-3">{plan.tier === "free" ? "forever" : cycleLabel}</span>
+            </span>
+            <ul className="grid gap-1.5 text-[0.8rem] text-ink-2">
+                <FeatureLine on>{servers}</FeatureLine>
+                {featureKeys.map((key) => {
+                    const st = featureStateFor(plan, catalogue, env, term, key);
+                    return (
+                        <FeatureLine key={key} on={st !== "absent"}>
+                            {featureLabel(key)}
+                            {st === "included" ? " included" : st === "addon" ? " add-on" : " not available"}
+                        </FeatureLine>
+                    );
+                })}
+                <FeatureLine on>{supportLabel(plan.support_level)} support</FeatureLine>
+            </ul>
+        </button>
+    );
+}
+
+function supportLabel(level: string) {
+    switch (level) {
+        case "community":
+            return "Community";
+        case "email_24_5":
+            return "Email, 24/5";
+        case "email_call_24_7":
+            return "Email + call, 24/7";
+        default:
+            return level;
+    }
+}
+
+function FeatureLine({ on, children }: { on: boolean; children: React.ReactNode }) {
+    return (
+        <li className={`flex items-start gap-2 ${on ? "" : "text-ink-3"}`}>
+            <span className={`mt-0.5 flex-none ${on ? "text-valid" : "text-ink-3"}`} aria-hidden>
+                {on ? (
+                    <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="3" strokeLinecap="round" strokeLinejoin="round">
+                        <path d="M20 6 9 17l-5-5" />
+                    </svg>
+                ) : (
+                    <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="3" strokeLinecap="round">
+                        <path d="M5 12h14" />
+                    </svg>
+                )}
+            </span>
+            <span>{children}</span>
+        </li>
+    );
+}
+
+function Row({ title, desc, dim, children }: { title: string; desc: string; dim?: boolean; children: React.ReactNode }) {
+    return (
+        <div className={`flex items-center justify-between gap-4 border-b border-rule-soft py-3.5 first:pt-0 last:border-0 last:pb-0 ${dim ? "opacity-55" : ""}`}>
+            <div className="min-w-0">
+                <h4 className="text-[0.9rem] font-semibold">{title}</h4>
+                {desc && <p className="text-[0.78rem] text-ink-3">{desc}</p>}
+            </div>
+            <div className="flex-none">{children}</div>
+        </div>
+    );
+}
+
+function Stepper({ value, min, max, onChange }: { value: number; min: number; max: number; onChange: (v: number) => void }) {
+    const clamp = (v: number) => Math.min(max, Math.max(min, v));
+    return (
+        <div className="inline-flex items-center overflow-hidden rounded-lg border border-rule">
+            <button
+                type="button"
+                aria-label="Fewer servers"
+                disabled={value <= min}
+                onClick={() => onChange(clamp(value - 1))}
+                className="h-9 w-9 bg-panel-2 text-lg leading-none text-ink hover:bg-accent-wash hover:text-accent disabled:opacity-35"
+            >
+                −
+            </button>
+            <input
+                value={value}
+                inputMode="numeric"
+                aria-label="Server count"
+                onChange={(e) => onChange(clamp(parseInt(e.target.value) || min))}
+                className="h-9 w-14 border-x border-rule bg-panel text-center text-[0.9rem] font-bold tabular-nums text-ink"
+            />
+            <button
+                type="button"
+                aria-label="More servers"
+                disabled={value >= max}
+                onClick={() => onChange(clamp(value + 1))}
+                className="h-9 w-9 bg-panel-2 text-lg leading-none text-ink hover:bg-accent-wash hover:text-accent disabled:opacity-35"
+            >
+                +
+            </button>
+        </div>
+    );
+}
+
+function Toggle({ checked, onChange }: { checked: boolean; onChange: (v: boolean) => void }) {
+    return (
+        <button
+            type="button"
+            role="switch"
+            aria-checked={checked}
+            onClick={() => onChange(!checked)}
+            className={`relative h-6 w-[42px] flex-none rounded-full transition-colors ${checked ? "bg-accent" : "bg-rule"}`}
+        >
+            <span className={`absolute top-[3px] h-[18px] w-[18px] rounded-full bg-white shadow transition-[left] ${checked ? "left-[21px]" : "left-[3px]"}`} />
+        </button>
+    );
+}
+
+function Receipt({
+    options,
+    dep,
+    choice,
+    plan,
+    items,
+    price,
+}: {
+    options: CheckoutOptions;
+    dep: Deployment;
+    choice: Choice;
+    plan: Plan | undefined;
+    items: { priceId: string; quantity: number }[];
+    price: PricePreview | null;
+}) {
+    if (choice.tier === "free") {
+        return (
+            <div className="px-4">
+                <div className="flex items-center justify-between gap-3 py-3 text-[0.85rem]">
+                    <span className="text-ink-2">
+                        {plan?.name ?? "Free"} plan
+                        <small className="block text-[0.72rem] text-ink-3">{plan?.base_limits.max_servers ?? 1} server · community support</small>
+                    </span>
+                    <span className="font-mono font-semibold tabular-nums text-valid">£0</span>
+                </div>
+            </div>
+        );
+    }
+
+    // Label each real line item from the catalogue, and price it from Paddle.
+    const base = plan?.base_limits.max_servers ?? 0;
+    const extra = base === -1 ? 0 : Math.max(0, choice.servers - base);
+    const rows = options.catalogue.filter((r) => r.deployment === dep && r.tier === choice.tier);
+    const idFor = (predicate: (r: CatalogueRow) => boolean) => {
+        const row = rows.find(predicate);
+        return row?.price_ids?.[options.env]?.[choice.term] ?? "";
+    };
+    const amount = (priceId: string) => price?.lines[priceId]?.total ?? null;
+
+    const lines: { label: string; sub?: string; value: string | null }[] = [];
+    const baseId = idFor((r) => r.kind === "base");
+    lines.push({
+        label: `${plan?.name ?? ""} base`,
+        sub: base === -1 ? "unlimited servers" : `${base} servers included`,
+        value: amount(baseId),
+    });
+    if (extra > 0) {
+        lines.push({
+            label: "Extra servers",
+            sub: `${extra} × per server`,
+            value: amount(idFor((r) => r.kind === "limit" && r.limit_key === "max_servers")),
+        });
+    }
+    for (const key of choice.features) {
+        const id = idFor((r) => r.kind === "feature" && r.feature_key === key);
+        if (id) lines.push({ label: featureLabel(key), sub: "add-on", value: amount(id) });
+    }
+
+    const priced = price !== null;
+    return (
+        <div className="px-4">
+            <div className="grid">
+                {lines.map((l, i) => (
+                    <div key={i} className="flex justify-between gap-3 border-b border-dashed border-rule-soft py-2.5 text-[0.85rem] last:border-0">
+                        <span className="text-ink-2">
+                            {l.label}
+                            {l.sub && <small className="block text-[0.72rem] text-ink-3">{l.sub}</small>}
+                        </span>
+                        <span className="font-mono font-semibold tabular-nums">{l.value ?? "—"}</span>
+                    </div>
+                ))}
+            </div>
+            <div className="mt-2 flex items-baseline justify-between border-t border-rule pt-3">
+                <span className="text-[0.85rem]">Total</span>
+                <span className="text-[1.4rem] font-extrabold tabular-nums">{priced && price?.total ? price.total : "—"}</span>
+            </div>
+            <p className="pb-3 pt-0.5 text-[0.72rem] text-ink-3">
+                {priced
+                    ? dep === "cloud"
+                        ? choice.term === "annual"
+                            ? "per year, billed annually"
+                            : "per month, billed monthly"
+                        : "per year, billed annually"
+                    : items.length > 0
+                      ? "Final price shown at checkout."
+                      : ""}
+            </p>
+        </div>
+    );
+}
+
+function Cta({ label, onClick, disabled, variant = "solid" }: { label: string; onClick: () => void; disabled?: boolean; variant?: "solid" | "line" }) {
+    return (
+        <button
+            type="button"
+            disabled={disabled}
+            onClick={onClick}
+            className={`rounded-[9px] px-3 py-3 text-[0.9rem] font-bold transition-[filter] hover:brightness-[1.06] disabled:opacity-40 disabled:hover:brightness-100 ${
+                variant === "solid" ? "bg-accent text-accent-ink" : "border border-accent bg-panel text-accent"
+            }`}
+        >
+            {label}
+        </button>
+    );
+}
+
+// ---------------------------------------------------------------------------
+// Icons
+// ---------------------------------------------------------------------------
+
+const cloudIcon = (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+        <path d="M17.5 19a4.5 4.5 0 0 0 .5-9 6 6 0 0 0-11.6-1.5A4 4 0 0 0 6 19z" />
+    </svg>
+);
+const serverIcon = (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+        <rect x="2" y="3" width="20" height="6" rx="1" />
+        <rect x="2" y="9" width="20" height="6" rx="1" />
+        <path d="M6 6h.01M6 12h.01" />
+    </svg>
+);
+const calendarIcon = (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+        <rect x="3" y="4" width="18" height="18" rx="2" />
+        <path d="M3 10h18M8 2v4M16 2v4" />
+    </svg>
+);
+const annualIcon = (
+    <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
+        <path d="M12 2v20M17 5H9.5a3.5 3.5 0 0 0 0 7h5a3.5 3.5 0 0 1 0 7H6" />
+    </svg>
+);
+function LockIcon() {
+    return (
+        <svg className="mt-px flex-none" width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <rect x="3" y="11" width="18" height="11" rx="2" />
+            <path d="M7 11V7a5 5 0 0 1 10 0v4" />
+        </svg>
+    );
+}

adminsite/app/(customer)/purchase/page.tsx

@@ -0,0 +1,18 @@
+import type { Metadata } from "next";
+import { PurchaseForm } from "./PurchaseForm";
+import { PageHeader } from "@/components/PageHeader";
+
+export const metadata: Metadata = { title: "Buy a plan" };
+
+export default function PurchasePage() {
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                back={{ href: "/", label: "Overview" }}
+                title="Choose your plan"
+                subtitle="Configure the instance, see exactly what you'll be charged, then pay. Nothing is billed until you confirm at checkout."
+            />
+            <PurchaseForm />
+        </div>
+    );
+}

adminsite/app/(customer)/settings/page.tsx

@@ -0,0 +1,74 @@
+"use client";
+
+import { useMutation } from "@tanstack/react-query";
+import { useState } from "react";
+import { ApiError, api } from "@/lib/api";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function SettingsPage() {
+    const [current, setCurrent] = useState("");
+    const [next, setNext] = useState("");
+    const [error, setError] = useState<string | null>(null);
+    const [done, setDone] = useState<string | null>(null);
+
+    const change = useMutation({
+        mutationFn: () => api.changePassword(current, next),
+        onSuccess: (res) => {
+            setCurrent("");
+            setNext("");
+            setDone(
+                res.propagation_pending
+                    ? "Password changed. One of your instances could not be updated just now; it will catch up within fifteen minutes."
+                    : "Password changed everywhere.",
+            );
+        },
+        onError: (e) =>
+            setError(e instanceof ApiError ? e.message : "Something went wrong. Try again."),
+    });
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                back={{ href: "/", label: "Overview" }}
+                title="Settings"
+                subtitle="Your password signs you in here and into every Vantage instance you belong to. Changing it changes all of them."
+            />
+
+            <form
+                className="grid max-w-md gap-4 rounded border border-rule bg-panel p-5"
+                onSubmit={(e) => {
+                    e.preventDefault();
+                    setError(null);
+                    setDone(null);
+                    change.mutate();
+                }}
+            >
+                <Field
+                    label="Current password"
+                    type="password"
+                    autoComplete="current-password"
+                    value={current}
+                    onChange={(e) => setCurrent(e.target.value)}
+                    required
+                />
+                <Field
+                    label="New password"
+                    type="password"
+                    autoComplete="new-password"
+                    value={next}
+                    onChange={(e) => setNext(e.target.value)}
+                    required
+                    minLength={12}
+                    hint="At least 12 characters."
+                    error={error ?? undefined}
+                />
+                {done && <p className="text-[0.9rem] text-valid">{done}</p>}
+                <Button type="submit" disabled={change.isPending || next.length < 12}>
+                    {change.isPending ? "Changing…" : "Change password"}
+                </Button>
+            </form>
+        </div>
+    );
+}

adminsite/app/(customer)/users/InvitePanel.tsx

@@ -0,0 +1,210 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useState } from "react";
+import { API_BASE, ApiError, NotConnected, api, type AccountRole } from "@/lib/api";
+import { useSession } from "@/lib/session";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+import { PageFrame, RailCard } from "@/components/PageFrame";
+import { formatDate } from "@/lib/format";
+
+const ROLES: AccountRole[] = ["owner", "admin", "member"];
+
+const WHAT_ROLES_DO: [AccountRole, string][] = [
+    ["owner", "Everything, including billing."],
+    ["admin", "Invite people, create instances, grant access. No billing."],
+    ["member", "Sign in to the instances they are given."],
+];
+
+export function InvitePanel() {
+    const qc = useQueryClient();
+    const { session } = useSession();
+    const [email, setEmail] = useState("");
+    const [role, setRole] = useState<AccountRole>("member");
+    const [error, setError] = useState<string | null>(null);
+
+    const users = useQuery({ queryKey: ["account-users"], queryFn: api.accountUsers });
+    const refresh = () => qc.invalidateQueries({ queryKey: ["account-users"] });
+    const fail = (e: unknown) =>
+        setError(e instanceof ApiError ? e.message : "Something went wrong. Try again.");
+
+    const invite = useMutation({
+        mutationFn: () => api.invite(email.trim().toLowerCase(), role),
+        onSuccess: () => {
+            setEmail("");
+            setRole("member");
+            refresh();
+        },
+        onError: fail,
+    });
+    const setRoleFor = useMutation({
+        mutationFn: (v: { id: string; role: AccountRole }) => api.setAccountRole(v.id, v.role),
+        onSuccess: refresh,
+        onError: fail,
+    });
+    const remove = useMutation({
+        mutationFn: (id: string) => api.removeAccountUser(id),
+        onSuccess: refresh,
+        onError: fail,
+    });
+
+    if (users.error instanceof NotConnected) return <NotConnectedPanel url={API_BASE} />;
+
+    const myRole = session?.account_role;
+    const canManage = myRole === "owner" || myRole === "admin";
+    const assignable = myRole === "owner" ? ROLES : ROLES.filter((r) => r !== "owner");
+
+    return (
+        <PageFrame
+            aside={
+                <>
+                    {canManage && (
+                        <RailCard title="Invite someone">
+                            <form
+                                className="grid gap-3"
+                                onSubmit={(e) => {
+                                    e.preventDefault();
+                                    setError(null);
+                                    if (email.trim()) invite.mutate();
+                                }}
+                            >
+                                <Field
+                                    label="Email"
+                                    type="email"
+                                    value={email}
+                                    onChange={(e) => setEmail(e.target.value)}
+                                    required
+                                    hint="They choose their own password from the emailed link. Nothing happens until they open it."
+                                />
+                                <label className="grid gap-1.5">
+                                    <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">
+                                        Account role
+                                    </span>
+                                    <select
+                                        value={role}
+                                        onChange={(e) => setRole(e.target.value as AccountRole)}
+                                        className="rounded border border-rule bg-panel-2 px-2.5 py-2 font-mono text-ink"
+                                    >
+                                        {assignable.map((r) => (
+                                            <option key={r} value={r}>
+                                                {r}
+                                            </option>
+                                        ))}
+                                    </select>
+                                </label>
+                                <Button type="submit" disabled={invite.isPending || !email.trim()}>
+                                    {invite.isPending ? "Sending…" : "Send invitation"}
+                                </Button>
+                            </form>
+                        </RailCard>
+                    )}
+
+                    <RailCard title="What the roles do">
+                        <dl className="grid gap-2">
+                            {WHAT_ROLES_DO.map(([r, what]) => (
+                                <div key={r} className="grid gap-0.5">
+                                    <dt className="font-mono text-[0.68rem] uppercase tracking-[0.08em] text-ink">
+                                        {r}
+                                    </dt>
+                                    <dd className="m-0 text-[0.8rem] text-ink-2">{what}</dd>
+                                </div>
+                            ))}
+                        </dl>
+                        <p className="border-t border-rule-soft pt-2 text-[0.8rem] text-ink-2">
+                            An account role is not access to an instance. Give someone that on the
+                            instance itself.
+                        </p>
+                    </RailCard>
+                </>
+            }
+        >
+            {error && (
+                <p className="rounded border border-expired bg-panel p-3 text-[0.9rem] text-expired">
+                    {error}
+                </p>
+            )}
+
+            <div className="overflow-x-auto rounded border border-rule bg-panel">
+                <table className="w-full border-collapse text-left text-[0.9rem]">
+                    <thead>
+                        <tr className="border-b border-rule bg-panel-2 font-mono text-[0.68rem] uppercase tracking-[0.1em] text-ink-3">
+                            <th className="px-4 py-2.5 font-normal">Email</th>
+                            <th className="px-4 py-2.5 font-normal">Account role</th>
+                            <th className="px-4 py-2.5 font-normal">Status</th>
+                            <th className="px-4 py-2.5" />
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {(users.data ?? []).map((u) => {
+                            const isSelf = u.email === session?.email;
+                            return (
+                                <tr key={u.user_id} className="border-b border-rule-soft last:border-0">
+                                    <td className="px-4 py-3">
+                                        {u.email}
+                                        {isSelf && <span className="ml-2 text-ink-3">(you)</span>}
+                                    </td>
+                                    <td className="px-4 py-3">
+                                        {canManage && !isSelf ? (
+                                            <select
+                                                value={u.account_role}
+                                                onChange={(e) =>
+                                                    setRoleFor.mutate({
+                                                        id: u.user_id,
+                                                        role: e.target.value as AccountRole,
+                                                    })
+                                                }
+                                                className="rounded border border-rule bg-panel-2 px-2 py-1 font-mono text-[0.82rem] text-ink"
+                                            >
+                                                {assignable.map((r) => (
+                                                    <option key={r} value={r}>
+                                                        {r}
+                                                    </option>
+                                                ))}
+                                            </select>
+                                        ) : (
+                                            <span className="font-mono text-[0.82rem]">
+                                                {u.account_role}
+                                            </span>
+                                        )}
+                                    </td>
+                                    <td className="px-4 py-3 text-ink-2">
+                                        {u.verified_at
+                                            ? `Active since ${formatDate(u.verified_at)}`
+                                            : "Invitation pending"}
+                                    </td>
+                                    <td className="px-4 py-3 text-right">
+                                        {canManage && !isSelf && (
+                                            <button
+                                                type="button"
+                                                className="text-[0.82rem] font-semibold text-expired underline"
+                                                onClick={() => {
+                                                    if (
+                                                        confirm(
+                                                            `Remove ${u.email}? They lose access to every instance on this account.`,
+                                                        )
+                                                    )
+                                                        remove.mutate(u.user_id);
+                                                }}
+                                            >
+                                                Remove
+                                            </button>
+                                        )}
+                                    </td>
+                                </tr>
+                            );
+                        })}
+                        {users.data?.length === 0 && (
+                            <tr>
+                                <td colSpan={4} className="px-4 py-6 text-ink-3">
+                                    Nobody yet.
+                                </td>
+                            </tr>
+                        )}
+                    </tbody>
+                </table>
+            </div>
+        </PageFrame>
+    );
+}

adminsite/app/(customer)/users/page.tsx

@@ -0,0 +1,16 @@
+"use client";
+
+import { InvitePanel } from "./InvitePanel";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function UsersPage() {
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="People"
+                subtitle="Everyone on this account. Owners and admins can invite people and grant them access to instances; billing stays with owners."
+            />
+            <InvitePanel />
+        </div>
+    );
+}

adminsite/app/(staff)/staff/accounts/AccountSearch.tsx

@@ -0,0 +1,69 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import Link from "next/link";
+import { useState } from "react";
+import { api } from "@/lib/api";
+import { Field } from "@/components/Field";
+import { formatDate } from "@/lib/format";
+
+export function AccountSearch() {
+    const [q, setQ] = useState("");
+    const { data, isFetching } = useQuery({
+        queryKey: ["staff-accounts", q],
+        queryFn: () => api.staff.accounts(q || undefined),
+    });
+
+    return (
+        <div className="grid gap-4">
+            <Field
+                label="Search"
+                value={q}
+                onChange={(e) => setQ(e.target.value)}
+                hint="Name, email, Paddle customer ID, or an instance UUID."
+            />
+            <div className="overflow-x-auto rounded border border-rule bg-panel">
+                <table className="w-full border-collapse text-left">
+                    <thead>
+                        <tr className="border-b border-rule bg-panel-2 font-mono text-[0.72rem] uppercase tracking-[0.08em] text-ink-3">
+                            <th className="px-4 py-2.5">Account</th>
+                            <th className="px-4 py-2.5">Billing email</th>
+                            <th className="px-4 py-2.5">Status</th>
+                            <th className="px-4 py-2.5">Created</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {(data ?? []).map((a) => (
+                            <tr
+                                key={a.account_id}
+                                className="border-b border-rule-soft last:border-0"
+                            >
+                                <td className="px-4 py-3">
+                                    <Link
+                                        href={`/staff/accounts/${a.account_id}`}
+                                        className="text-accent underline"
+                                    >
+                                        {a.name}
+                                    </Link>
+                                </td>
+                                <td className="px-4 py-3 font-mono text-[0.82rem]">
+                                    {a.billing_email}
+                                </td>
+                                <td className="px-4 py-3">{a.status}</td>
+                                <td className="px-4 py-3 font-mono tabular-nums">
+                                    {formatDate(a.created_at)}
+                                </td>
+                            </tr>
+                        ))}
+                    </tbody>
+                </table>
+                {!isFetching && (data ?? []).length === 0 && (
+                    <p className="px-4 py-6 text-ink-3">
+                        No account matches that. Try the instance UUID from the customer&rsquo;s
+                        email.
+                    </p>
+                )}
+            </div>
+        </div>
+    );
+}

adminsite/app/(staff)/staff/accounts/[id]/page.tsx

@@ -0,0 +1,100 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { useParams } from "next/navigation";
+import Link from "next/link";
+import { api } from "@/lib/api";
+import { formatDate } from "@/lib/format";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function AccountDetailPage() {
+    const id = String(useParams().id);
+    const { data, isLoading } = useQuery({
+        queryKey: ["staff-account", id],
+        queryFn: () => api.staff.account(id),
+    });
+
+    if (isLoading || !data) return <p className="text-ink-3">Loading…</p>;
+
+    return (
+        <div className="grid gap-8">
+            <PageHeader
+                back={{ href: "/staff/accounts", label: "Accounts" }}
+                title={data.account.name}
+                subtitle={data.account.billing_email}
+                record={[
+                    { key: "Account", value: data.account.account_id, copy: true },
+                    { key: "Status", value: data.account.status },
+                    ...(data.account.paddle_customer_id ? [{ key: "Paddle", value: data.account.paddle_customer_id, copy: true }] : []),
+                ]}
+            />
+
+            <Panel title="Instances">
+                <ul className="grid gap-2">
+                    {data.instances.map((i) => (
+                        <li key={i.instance_id} className="flex flex-wrap justify-between gap-2">
+                            <Link href={`/staff/instances/${i.instance_id}`} className="text-accent underline">
+                                {i.name || i.instance_id}
+                            </Link>
+                            <span className="font-mono text-[0.82rem] text-ink-3">
+                                {i.deployment} · {i.tier ?? "no tier"} · {i.status}
+                            </span>
+                        </li>
+                    ))}
+                    {data.instances.length === 0 && <li className="text-ink-3">None.</li>}
+                </ul>
+            </Panel>
+
+            <Panel title="Subscriptions">
+                <ul className="grid gap-2">
+                    {data.subscriptions.map((s) => (
+                        <li key={s.subscription_id} className="flex flex-wrap justify-between gap-2">
+                            <span>
+                                {s.tier.replace("_", " ")} · {s.term}
+                            </span>
+                            <span className="font-mono text-[0.82rem] text-ink-3">
+                                {s.status} · renews {formatDate(s.current_period_end)}
+                            </span>
+                        </li>
+                    ))}
+                    {data.subscriptions.length === 0 && <li className="text-ink-3">None.</li>}
+                </ul>
+            </Panel>
+
+            <Panel title="People">
+                <ul className="grid gap-2">
+                    {data.users.map((u) => (
+                        <li key={u.user_id} className="flex flex-wrap justify-between gap-2">
+                            <span className="font-mono text-[0.82rem]">{u.email}</span>
+                            <span className="font-mono text-[0.82rem] text-ink-3">{u.verified_at ? `verified ${formatDate(u.verified_at)}` : "not verified"}</span>
+                        </li>
+                    ))}
+                    {data.users.length === 0 && <li className="text-ink-3">None this is a cloud account, so its people sign in with their control-plane details.</li>}
+                </ul>
+            </Panel>
+
+            <Panel title="Audit">
+                <ul className="grid gap-1 font-mono text-[0.82rem]">
+                    {data.audit.map((e, n) => (
+                        <li key={n} className="flex flex-wrap justify-between gap-2 text-ink-2">
+                            <span>
+                                {e.action} · {e.actor}
+                            </span>
+                            <span className="tabular-nums text-ink-3">{formatDate(e.created_at)}</span>
+                        </li>
+                    ))}
+                    {data.audit.length === 0 && <li className="text-ink-3">Nothing yet.</li>}
+                </ul>
+            </Panel>
+        </div>
+    );
+}
+
+function Panel({ title, children }: { title: string; children: React.ReactNode }) {
+    return (
+        <section className="grid gap-3 rounded border border-rule bg-panel p-5">
+            <h2 className="text-xl">{title}</h2>
+            {children}
+        </section>
+    );
+}

adminsite/app/(staff)/staff/accounts/page.tsx

@@ -0,0 +1,14 @@
+import { AccountSearch } from "./AccountSearch";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function AccountsPage() {
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Accounts"
+                subtitle="Search by name, email, Paddle ID or instance UUID."
+            />
+            <AccountSearch />
+        </div>
+    );
+}

adminsite/app/(staff)/staff/audit/page.tsx

@@ -0,0 +1,53 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { useState } from "react";
+import { api } from "@/lib/api";
+import { formatDate, formatStamp } from "@/lib/format";
+import { Field } from "@/components/Field";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function AuditPage() {
+    const [filter, setFilter] = useState("");
+    const { data } = useQuery({ queryKey: ["staff-audit"], queryFn: () => api.staff.audit() });
+
+    const rows = (data ?? []).filter((e) =>
+        filter
+            ? `${e.action} ${e.actor} ${e.target ?? ""}`.toLowerCase().includes(filter.toLowerCase())
+            : true,
+    );
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Audit"
+                subtitle="Every mutating action across every account, newest first."
+                record={[{ key: "Showing", value: `${rows.length} of ${(data ?? []).length}` }]}
+            />
+            <Field
+                label="Filter"
+                value={filter}
+                onChange={(e) => setFilter(e.target.value)}
+                hint="Action, actor or target."
+            />
+            <ul className="grid gap-2 rounded border border-rule bg-panel p-5 font-mono text-[0.82rem]">
+                {rows.map((e, n) => (
+                    <li
+                        key={n}
+                        className="grid gap-1 border-b border-rule-soft pb-2 last:border-0 sm:grid-cols-[11rem_1fr]"
+                    >
+                        <span className="tabular-nums text-ink-3">
+                            {formatDate(e.created_at)} {formatStamp(e.created_at)}
+                        </span>
+                        <span className="text-ink-2">
+                            <b className="text-ink">{e.action}</b> · {e.actor}
+                            {e.target && ` · ${e.target}`}
+                            {e.detail && ` · ${e.detail}`}
+                        </span>
+                    </li>
+                ))}
+                {rows.length === 0 && <li className="text-ink-3">Nothing matches that.</li>}
+            </ul>
+        </div>
+    );
+}

adminsite/app/(staff)/staff/catalogue/page.tsx

@@ -0,0 +1,184 @@
+"use client";
+
+import { useState } from "react";
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { PageHeader } from "@/components/PageHeader";
+import { PageFrame } from "@/components/PageFrame";
+import { api, type CatalogueRow, type Term } from "@/lib/api";
+
+const ENVS = ["sandbox", "production"] as const;
+
+/* Self-hosted sells annual only, so the monthly cell is not rendered for it
+ * rather than rendered and rejected. The backend refuses one either way; this is
+ * so nobody types into a field that cannot be saved. */
+function termsFor(deployment: string): Term[] {
+    return deployment === "self_hosted" ? ["annual"] : ["monthly", "annual"];
+}
+
+function componentLabel(r: CatalogueRow): string {
+    if (r.kind === "base") return "Base fee";
+    if (r.kind === "limit") return `Per ${r.limit_key?.replace("max_", "")}`;
+    return `Feature: ${r.feature_key}`;
+}
+
+function rowKey(r: CatalogueRow): string {
+    return [r.deployment, r.tier, r.kind, r.limit_key ?? "", r.feature_key ?? ""].join("/");
+}
+
+export default function CataloguePage() {
+    const qc = useQueryClient();
+    const { data: rows = [], isLoading } = useQuery({
+        queryKey: ["staff", "catalogue"],
+        queryFn: api.staff.catalogue,
+    });
+    const [drafts, setDrafts] = useState<Record<string, CatalogueRow["price_ids"]>>({});
+
+    const save = useMutation({
+        mutationFn: (r: CatalogueRow) => api.staff.updateCatalogue(r),
+        onSuccess: () => qc.invalidateQueries({ queryKey: ["staff", "catalogue"] }),
+    });
+
+    const groups = Array.from(new Set(rows.map((r) => `${r.deployment}/${r.tier}`)));
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Catalogue"
+                back={{ href: "/staff", label: "Operations" }}
+                subtitle="Every priceable component. This is the only place a Paddle price ID lives."
+            />
+            <PageFrame
+                aside={
+                    <aside className="space-y-3 text-[0.82rem] text-ink-2">
+                        <p>
+                            A component with no price ID is free. A feature with no price is a
+                            toggle a customer may take at no charge; giving it a price here is
+                            all it takes to start charging for it.
+                        </p>
+                        <p>
+                            Free is priced by nothing and has no rows. That absence is what
+                            keeps it outside Paddle.
+                        </p>
+                        <p>
+                            Changing a price affects the next checkout only. It cannot touch an
+                            issued licence.
+                        </p>
+                    </aside>
+                }
+            >
+                {isLoading ? (
+                    <p className="text-[0.85rem] text-ink-3">Loading…</p>
+                ) : (
+                    <div className="space-y-6">
+                        {groups.map((g) => {
+                            const [deployment, tier] = g.split("/");
+                            const terms = termsFor(deployment);
+                            return (
+                                <section key={g} className="space-y-2">
+                                    <h2 className="text-[0.95rem] font-medium text-ink">
+                                        {deployment === "cloud" ? "Cloud" : "Self-Hosted"}{" "}
+                                        {tier}
+                                    </h2>
+                                    <div className="overflow-x-auto">
+                                        <table className="w-full min-w-[42rem] border-collapse text-[0.82rem]">
+                                            <thead>
+                                                <tr className="border-b border-rule text-left text-ink-3">
+                                                    <th className="py-2 pr-3 font-normal">Component</th>
+                                                    {ENVS.map((env) =>
+                                                        terms.map((t) => (
+                                                            <th
+                                                                key={`${env}-${t}`}
+                                                                className="py-2 pr-3 font-normal"
+                                                            >
+                                                                {env} / {t}
+                                                            </th>
+                                                        )),
+                                                    )}
+                                                    <th className="py-2 font-normal" />
+                                                </tr>
+                                            </thead>
+                                            <tbody>
+                                                {rows
+                                                    .filter(
+                                                        (r) =>
+                                                            r.deployment === deployment &&
+                                                            r.tier === tier,
+                                                    )
+                                                    .map((r) => {
+                                                        const k = rowKey(r);
+                                                        const ids = drafts[k] ?? r.price_ids ?? {};
+                                                        const dirty =
+                                                            JSON.stringify(ids) !==
+                                                            JSON.stringify(r.price_ids ?? {});
+                                                        return (
+                                                            <tr
+                                                                key={k}
+                                                                className="border-b border-rule/60"
+                                                            >
+                                                                <td className="py-2 pr-3 text-ink">
+                                                                    {componentLabel(r)}
+                                                                </td>
+                                                                {ENVS.map((env) =>
+                                                                    terms.map((t) => (
+                                                                        <td
+                                                                            key={`${env}-${t}`}
+                                                                            className="py-2 pr-3"
+                                                                        >
+                                                                            <input
+                                                                                value={
+                                                                                    ids[env]?.[t] ?? ""
+                                                                                }
+                                                                                placeholder="pri_…"
+                                                                                onChange={(e) =>
+                                                                                    setDrafts({
+                                                                                        ...drafts,
+                                                                                        [k]: {
+                                                                                            ...ids,
+                                                                                            [env]: {
+                                                                                                ...(ids[
+                                                                                                    env
+                                                                                                ] ?? {}),
+                                                                                                [t]: e
+                                                                                                    .target
+                                                                                                    .value,
+                                                                                            },
+                                                                                        },
+                                                                                    })
+                                                                                }
+                                                                                className="w-40 rounded border border-rule bg-panel px-2 py-1 font-mono text-[0.78rem] text-ink"
+                                                                            />
+                                                                        </td>
+                                                                    )),
+                                                                )}
+                                                                <td className="py-2">
+                                                                    <button
+                                                                        type="button"
+                                                                        disabled={
+                                                                            !dirty || save.isPending
+                                                                        }
+                                                                        onClick={() =>
+                                                                            save.mutate({
+                                                                                ...r,
+                                                                                price_ids: ids,
+                                                                            })
+                                                                        }
+                                                                        className="rounded border border-accent/50 px-2.5 py-1 text-[0.78rem] text-accent disabled:opacity-40"
+                                                                    >
+                                                                        Save
+                                                                    </button>
+                                                                </td>
+                                                            </tr>
+                                                        );
+                                                    })}
+                                            </tbody>
+                                        </table>
+                                    </div>
+                                </section>
+                            );
+                        })}
+                    </div>
+                )}
+            </PageFrame>
+        </div>
+    );
+}

adminsite/app/(staff)/staff/instances/[id]/IssuePanel.tsx

@@ -0,0 +1,63 @@
+"use client";
+
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import { useState } from "react";
+import { ApiError, api, type Tier } from "@/lib/api";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+
+export function IssuePanel({ instanceId }: { instanceId: string }) {
+    const qc = useQueryClient();
+    const [tier, setTier] = useState<Tier>("professional");
+    const [term, setTerm] = useState("annual");
+    const [newId, setNewId] = useState("");
+    const [error, setError] = useState<string | undefined>();
+
+    const invalidate = () => qc.invalidateQueries({ queryKey: ["staff-instance", instanceId] });
+
+    const issue = useMutation({
+        mutationFn: () => api.staff.issue(instanceId, { tier, term, reason: "manual" }),
+        onSuccess: invalidate,
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Issue failed."),
+    });
+
+    const relink = useMutation({
+        mutationFn: () => api.staff.relink(instanceId, newId.trim()),
+        onSuccess: invalidate,
+        onError: (e) => setError(e instanceof ApiError ? e.message : "Relink failed."),
+    });
+
+    return (
+        <section className="grid gap-4 border-t border-rule-soft pt-5">
+            <div className="flex flex-wrap items-end gap-3">
+                <label className="grid gap-1.5">
+                    <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">Tier</span>
+                    <select value={tier} onChange={(e) => setTier(e.target.value as Tier)} className="rounded border border-rule bg-panel-2 px-2.5 py-2">
+                        <option value="free">Free</option>
+                        <option value="professional">Professional</option>
+                        <option value="enterprise">Enterprise</option>
+                    </select>
+                </label>
+                <label className="grid gap-1.5">
+                    <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">Term</span>
+                    <select value={term} onChange={(e) => setTerm(e.target.value)} className="rounded border border-rule bg-panel-2 px-2.5 py-2">
+                        <option value="annual">Annual</option>
+                        <option value="monthly">Monthly</option>
+                    </select>
+                </label>
+                <Button type="button" onClick={() => issue.mutate()} disabled={issue.isPending}>
+                    {issue.isPending ? "Issuing…" : "Issue licence"}
+                </Button>
+            </div>
+
+            <div className="flex flex-wrap items-end gap-3">
+                <Field label="Relink to instance ID" value={newId} onChange={(e) => setNewId(e.target.value)} hint="Staff relinks are not capped the customer cap exists to put you in the loop." />
+                <Button type="button" variant="line" onClick={() => relink.mutate()} disabled={!newId.trim()}>
+                    Relink
+                </Button>
+            </div>
+
+            {error && <p className="text-[0.82rem] text-expired">{error}</p>}
+        </section>
+    );
+}

adminsite/app/(staff)/staff/instances/[id]/page.tsx

@@ -0,0 +1,145 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useParams } from "next/navigation";
+import { useState } from "react";
+import Link from "next/link";
+import clsx from "clsx";
+import { api, type Deployment, type InjectionState } from "@/lib/api";
+import { Ledger } from "@/components/Ledger";
+import { PageHeader } from "@/components/PageHeader";
+import PlanConfigurator, { type PlanChoice } from "@/components/PlanConfigurator";
+import { IssuePanel } from "./IssuePanel";
+
+const INJECTION: Record<InjectionState, { label: string; tone: string }> = {
+    current: { label: "Control plane holds the current licence", tone: "text-valid" },
+    stale: {
+        label: "Control plane holds an older blob the reconciler will repair it",
+        tone: "text-warn",
+    },
+    missing: { label: "No matching instance in the control plane", tone: "text-expired" },
+    none_issued: { label: "Nothing issued yet, so nothing to inject", tone: "text-ink-3" },
+};
+
+export default function StaffInstancePage() {
+    const id = String(useParams().id);
+    const { data, isLoading } = useQuery({
+        queryKey: ["staff-instance", id],
+        queryFn: () => api.staff.instance(id),
+        refetchInterval: 30_000,
+    });
+
+    if (isLoading || !data) return <p className="text-ink-3">Loading…</p>;
+
+    const inj = data.injection.state ? INJECTION[data.injection.state] : undefined;
+
+    return (
+        <div className="grid gap-8">
+            <div className="grid gap-3">
+                <PageHeader
+                    back={{
+                        href: `/staff/accounts/${data.account.account_id}`,
+                        label: data.account.name || "Account",
+                    }}
+                    title={data.instance.name || data.instance.instance_id}
+                    subtitle={
+                        <>
+                            <Link href={`/staff/accounts/${data.account.account_id}`} className="text-accent underline">
+                                {data.account.name || data.account.account_id}
+                            </Link>
+                            <span className="text-ink-3">
+                                {" "}
+                                · {data.instance.deployment} · {data.instance.status}
+                                {data.instance.relink_count > 0 && ` · ${data.instance.relink_count} relinks this term`}
+                            </span>
+                        </>
+                    }
+                    record={[{ key: "Instance", value: data.instance.instance_id, copy: true }, ...(data.instance.slug ? [{ key: "Slug", value: data.instance.slug }] : [])]}
+                />
+                {data.injection.applicable && inj && <p className={clsx("font-mono text-[0.72rem]", inj.tone)}>{inj.label}</p>}
+            </div>
+
+            <section className="grid gap-3 rounded border border-rule bg-panel p-5">
+                <h2 className="text-xl">Licence history</h2>
+                <Ledger licenses={data.licenses} />
+                <IssuePanel instanceId={data.instance.instance_id} />
+            </section>
+
+            <EntitlementSection instanceId={data.instance.instance_id} deployment={data.instance.deployment} />
+        </div>
+    );
+}
+
+function EntitlementSection({ instanceId, deployment }: { instanceId: string; deployment: Deployment }) {
+    const qc = useQueryClient();
+    const { data: plans = [] } = useQuery({
+        queryKey: ["staff", "plans"],
+        queryFn: api.staff.plans,
+    });
+    const { data: catalogue = [] } = useQuery({
+        queryKey: ["staff", "catalogue"],
+        queryFn: api.staff.catalogue,
+    });
+    const { data } = useQuery({
+        queryKey: ["staff", "entitlement", instanceId],
+        queryFn: () => api.staff.entitlement(instanceId),
+        retry: false,
+    });
+
+    const ent = data?.entitlement;
+    const [draft, setDraft] = useState<PlanChoice | null>(null);
+    const choice: PlanChoice =
+        draft ??
+        (ent
+            ? {
+                  tier: ent.tier,
+                  term: ent.term,
+                  servers: ent.desired.servers,
+                  features: ent.desired.features ?? [],
+              }
+            : { tier: "professional", term: deployment === "self_hosted" ? "annual" : "monthly", servers: 3, features: [] });
+
+    const save = useMutation({
+        mutationFn: (grant: boolean) => api.staff.setEntitlement(instanceId, { ...choice, grant }),
+        onSuccess: () => {
+            setDraft(null);
+            qc.invalidateQueries({ queryKey: ["staff", "entitlement", instanceId] });
+        },
+    });
+
+    return (
+        <section className="rounded-lg border border-rule bg-panel p-4">
+            <header className="mb-3">
+                <h2 className="text-[0.95rem] font-medium text-ink">Entitlement</h2>
+                <p className="text-[0.78rem] text-ink-3">
+                    What this instance is allowed. A licence is signed from <em>granted</em>, never from <em>desired</em>.
+                </p>
+            </header>
+
+            {ent && data?.pending && (
+                <p className="mb-3 rounded border border-warn/50 bg-panel-2 px-2.5 py-2 text-[0.82rem] text-ink-2">
+                    Pending change currently granted {ent.granted.servers} servers, configured for {ent.desired.servers}
+                    {ent.scheduled_change_at ? `, effective ${new Date(ent.scheduled_change_at).toLocaleDateString("en-GB", { day: "numeric", month: "long", year: "numeric" })}` : ""}.
+                </p>
+            )}
+
+            <PlanConfigurator deployment={deployment} value={choice} plans={plans} catalogue={catalogue} onChange={setDraft} disabled={save.isPending} />
+
+            <div className="mt-4 flex flex-wrap gap-2">
+                <button type="button" disabled={save.isPending} onClick={() => save.mutate(false)} className="rounded border border-rule px-3 py-1.5 text-[0.85rem] text-ink-2 disabled:opacity-40">
+                    Save as configured
+                </button>
+                <button
+                    type="button"
+                    disabled={save.isPending}
+                    onClick={() => save.mutate(true)}
+                    className="rounded border border-accent/50 px-3 py-1.5 text-[0.85rem] text-accent disabled:opacity-40"
+                >
+                    Save and grant
+                </button>
+            </div>
+            <p className="mt-2 text-[0.72rem] text-ink-3">Granting takes effect on the next licence issued. It does not issue one.</p>
+            {save.error && <p className="mt-2 text-[0.82rem] text-expired">{String((save.error as Error).message)}</p>}
+        </section>
+    );
+}

adminsite/app/(staff)/staff/layout.tsx

@@ -0,0 +1,30 @@
+"use client";
+
+import { RequireKind } from "@/lib/session";
+import { AppBar, type NavLink } from "@/components/AppBar";
+
+const LINKS: NavLink[] = [
+    { href: "/staff", label: "Operations" },
+    { href: "/staff/accounts", label: "Accounts" },
+    { href: "/staff/licenses", label: "Licences" },
+    { href: "/staff/plans", label: "Plans" },
+    { href: "/staff/catalogue", label: "Catalogue" },
+    { href: "/staff/audit", label: "Audit" },
+];
+
+export default function StaffLayout({ children }: { children: React.ReactNode }) {
+    return (
+        <RequireKind kind="staff">
+            <AppBar
+                links={LINKS}
+                staff
+                context={
+                    <span className="rounded-sm border border-accent px-1.5 py-0.5 font-mono text-[0.64rem] uppercase tracking-[0.12em] text-accent">
+                        Staff
+                    </span>
+                }
+            />
+            <main className="mx-auto max-w-rail px-5 py-7">{children}</main>
+        </RequireKind>
+    );
+}

adminsite/app/(staff)/staff/licenses/page.tsx

@@ -0,0 +1,102 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import Link from "next/link";
+import { useState } from "react";
+import { api, type Tier } from "@/lib/api";
+import { formatDate } from "@/lib/format";
+import { PageHeader } from "@/components/PageHeader";
+
+export default function LicensesPage() {
+    const [tier, setTier] = useState<"" | Tier>("");
+    const [reason, setReason] = useState("");
+    const { data } = useQuery({ queryKey: ["staff-licenses"], queryFn: () => api.staff.licenses() });
+
+    // Filtered here rather than server-side: the endpoint caps at 500 rows and
+    // staff are narrowing a list they can already see.
+    const rows = (data ?? []).filter(
+        (l) => (!tier || l.tier === tier) && (!reason || l.reason === reason),
+    );
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Licences"
+                subtitle="Append-only. A renewal writes a new row and supersedes the old one."
+                record={[{ key: "Showing", value: `${rows.length} of ${(data ?? []).length}` }]}
+            />
+            <div className="flex flex-wrap gap-3">
+                <select
+                    value={tier}
+                    onChange={(e) => setTier(e.target.value as Tier | "")}
+                    className="rounded border border-rule bg-panel-2 px-2.5 py-2"
+                    aria-label="Filter by tier"
+                >
+                    <option value="">All tiers</option>
+                    <option value="free">Free</option>
+                    <option value="professional">Professional</option>
+                    <option value="enterprise">Enterprise</option>
+                    <option value="self_hosted">Self-Hosted (legacy)</option>
+                </select>
+                <select
+                    value={reason}
+                    onChange={(e) => setReason(e.target.value)}
+                    className="rounded border border-rule bg-panel-2 px-2.5 py-2"
+                    aria-label="Filter by reason"
+                >
+                    <option value="">All reasons</option>
+                    <option value="new">New</option>
+                    <option value="renewal">Renewal</option>
+                    <option value="tier_change">Tier change</option>
+                    <option value="relink">Relink</option>
+                    <option value="manual">Manual</option>
+                </select>
+            </div>
+            <div className="overflow-x-auto rounded border border-rule bg-panel">
+                <table className="w-full border-collapse text-left">
+                    <thead>
+                        <tr className="border-b border-rule bg-panel-2 font-mono text-[0.72rem] uppercase tracking-[0.08em] text-ink-3">
+                            <th className="px-4 py-2.5">Issued</th>
+                            <th className="px-4 py-2.5">Instance</th>
+                            <th className="px-4 py-2.5">Tier</th>
+                            <th className="px-4 py-2.5">Reason</th>
+                            <th className="px-4 py-2.5">Expires</th>
+                            <th className="px-4 py-2.5">State</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        {rows.map((l) => (
+                            <tr
+                                key={l.license_id}
+                                className="border-b border-rule-soft last:border-0"
+                            >
+                                <td className="px-4 py-3 font-mono tabular-nums">
+                                    {formatDate(l.issued_at)}
+                                </td>
+                                <td className="px-4 py-3">
+                                    <Link
+                                        href={`/staff/instances/${l.instance_id}`}
+                                        className="font-mono text-[0.82rem] text-accent underline"
+                                    >
+                                        {l.instance_id.slice(0, 8)}
+                                    </Link>
+                                </td>
+                                <td className="px-4 py-3">{l.tier.replace("_", " ")}</td>
+                                <td className="px-4 py-3">{l.reason.replace("_", " ")}</td>
+                                <td className="px-4 py-3 font-mono tabular-nums">
+                                    {formatDate(l.expires_at)}
+                                </td>
+                                <td className="px-4 py-3 text-ink-3">
+                                    {l.superseded_by ? "superseded" : "current"}
+                                </td>
+                            </tr>
+                        ))}
+                    </tbody>
+                </table>
+                {rows.length === 0 && (
+                    <p className="px-4 py-6 text-ink-3">No licences match those filters.</p>
+                )}
+            </div>
+        </div>
+    );
+}

adminsite/app/(staff)/staff/page.tsx

@@ -0,0 +1,169 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import Link from "next/link";
+import { API_BASE, NotConnected, api } from "@/lib/api";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { Queue } from "@/components/Queue";
+import { PageFrame, RailCard, RailFacts } from "@/components/PageFrame";
+import { PageHeader } from "@/components/PageHeader";
+import { StatePill } from "@/components/StatePill";
+import { LinkButton } from "@/components/Button";
+import { daysRemaining, formatStamp } from "@/lib/format";
+
+const HOURS_48 = 48 * 3600_000;
+
+export default function StaffDashboard() {
+    const injection = useQuery({ queryKey: ["injection"], queryFn: api.staff.injectionHealth });
+    const expiring = useQuery({
+        queryKey: ["instances", "expiring"],
+        queryFn: () => api.staff.instances({ expiring: "true" }),
+    });
+    const pastDue = useQuery({
+        queryKey: ["subs", "past_due"],
+        queryFn: () => api.staff.subscriptions("past_due"),
+    });
+    const unlinked = useQuery({
+        queryKey: ["instances", "awaiting_link"],
+        queryFn: () => api.staff.instances({ status: "awaiting_link" }),
+    });
+    const audit = useQuery({ queryKey: ["staff-audit"], queryFn: () => api.staff.audit() });
+    const allInstances = useQuery({
+        queryKey: ["instances", "all"],
+        queryFn: () => api.staff.instances(),
+    });
+
+    if (injection.error instanceof NotConnected) return <NotConnectedPanel url={API_BASE} />;
+
+    const stale = (unlinked.data ?? []).filter((i) => Date.now() - new Date(i.created_at).getTime() > HOURS_48);
+
+    const failed = injection.data?.count ?? 0;
+    const instances = allInstances.data ?? [];
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Operations"
+                subtitle={failed > 0 ? "Injection failures come first those instances are paying for a licence they have not received." : "Nothing failing. Queues below are routine chasing."}
+                actions={
+                    <LinkButton variant="line" href="/staff/accounts">
+                        Find an account
+                    </LinkButton>
+                }
+                record={[{ key: "Checked", value: formatStamp(new Date().toISOString()) }]}
+                status={failed > 0 ? <StatePill state="expired" /> : <StatePill state="valid" />}
+            />
+
+            <div className="grid gap-4 sm:grid-cols-2 lg:grid-cols-4">
+                <Queue
+                    title="Failed injections"
+                    tone="expired"
+                    count={failed}
+                    items={(injection.data?.failed ?? []).slice(0, 4).map((i) => ({
+                        label: i.name || i.instance_id,
+                        href: `/staff/instances/${i.instance_id}`,
+                        meta: i.inject_failed_at ? new Date(i.inject_failed_at).toISOString().slice(11, 16) : "",
+                    }))}
+                />
+                <Queue
+                    title="Expiring ≤ 14 days"
+                    tone="warn"
+                    count={expiring.data?.length ?? 0}
+                    items={(expiring.data ?? []).slice(0, 4).map((i) => ({
+                        label: i.name || i.instance_id,
+                        href: `/staff/instances/${i.instance_id}`,
+                        meta: i.tier ?? "",
+                    }))}
+                />
+                <Queue
+                    title="Past due"
+                    tone="expired"
+                    count={pastDue.data?.length ?? 0}
+                    items={(pastDue.data ?? []).slice(0, 4).map((s) => ({
+                        label: s.instance_id || s.account_id,
+                        href: `/staff/accounts/${s.account_id}`,
+                        meta: `${daysRemaining(s.current_period_end)}d`,
+                    }))}
+                />
+                <Queue
+                    title="Unlinked > 48h"
+                    tone="accent"
+                    count={stale.length}
+                    items={stale.slice(0, 4).map((i) => ({
+                        label: i.name || i.instance_id,
+                        href: `/staff/accounts/${i.account_id}`,
+                        meta: `${Math.floor((Date.now() - new Date(i.created_at).getTime()) / 86_400_000)}d`,
+                    }))}
+                />
+            </div>
+
+            <PageFrame
+                aside={
+                    <RailCard title="Fleet">
+                        <RailFacts
+                            rows={[
+                                { label: "Instances", value: instances.length },
+                                {
+                                    label: "Cloud",
+                                    value: instances.filter((i) => i.deployment === "cloud").length,
+                                },
+                                {
+                                    label: "Self-hosted",
+                                    value: instances.filter((i) => i.deployment === "self_hosted").length,
+                                },
+                                {
+                                    label: "Awaiting link",
+                                    value: (unlinked.data ?? []).length,
+                                },
+                            ]}
+                        />
+                        <Link href="/staff/licenses" className="text-[0.82rem] font-semibold text-accent underline">
+                            All licences
+                        </Link>
+                    </RailCard>
+                }
+            >
+                <section className="overflow-hidden rounded border border-rule bg-panel">
+                    <header className="flex flex-wrap items-center justify-between gap-3 border-b border-rule-soft bg-panel-2 px-4 py-3">
+                        <div>
+                            <h2 className="text-[0.95rem]">Recent activity</h2>
+                            <p className="text-[0.8rem] text-ink-2">Every licence issued, relinked or reaped, newest first.</p>
+                        </div>
+                        <Link href="/staff/audit" className="text-[0.82rem] font-semibold text-accent underline">
+                            Full audit
+                        </Link>
+                    </header>
+                    <div className="overflow-x-auto">
+                        <table className="w-full border-collapse text-left text-[0.86rem]">
+                            <thead>
+                                <tr className="border-b border-rule-soft font-mono text-[0.64rem] uppercase tracking-[0.11em] text-ink-3">
+                                    <th className="px-4 py-2 font-normal">Time</th>
+                                    <th className="px-4 py-2 font-normal">Action</th>
+                                    <th className="px-4 py-2 font-normal">Target</th>
+                                    <th className="px-4 py-2 font-normal">Actor</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {(audit.data ?? []).slice(0, 12).map((e, n) => (
+                                    <tr key={n} className="border-b border-rule-soft last:border-0">
+                                        <td className="px-4 py-2.5 font-mono tabular-nums text-ink-2">{new Date(e.created_at).toISOString().slice(11, 16)}</td>
+                                        <td className="px-4 py-2.5">{e.action}</td>
+                                        <td className="px-4 py-2.5 text-ink-2">{e.target ?? "—"}</td>
+                                        <td className="px-4 py-2.5 text-ink-3">{e.actor}</td>
+                                    </tr>
+                                ))}
+                                {audit.data?.length === 0 && (
+                                    <tr>
+                                        <td colSpan={4} className="px-4 py-6 text-ink-3">
+                                            Nothing yet today.
+                                        </td>
+                                    </tr>
+                                )}
+                            </tbody>
+                        </table>
+                    </div>
+                </section>
+            </PageFrame>
+        </div>
+    );
+}

adminsite/app/(staff)/staff/plans/page.tsx

@@ -0,0 +1,148 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useState } from "react";
+import { api, type Deployment, type Plan, type Tier } from "@/lib/api";
+import { ConfirmPlanChange } from "@/components/ConfirmPlanChange";
+import { PageHeader } from "@/components/PageHeader";
+
+const SUPPORT_LEVELS = [
+    { value: "community", label: "Community" },
+    { value: "email_24_5", label: "Email, 24/5" },
+    { value: "email_call_24_7", label: "Email + call, 24/7" },
+] as const;
+
+const LIMIT_FIELDS = [
+    { key: "max_servers", label: "Servers" },
+    { key: "max_monitors", label: "Monitors" },
+    { key: "max_secret_groups", label: "Secret groups" },
+    { key: "max_channels", label: "Channels" },
+    { key: "audit_retention_days", label: "Audit history (days)" },
+] as const;
+
+/*
+ * -1 is Unlimited everywhere in the licence payload, so the form takes it
+ * literally rather than inventing a checkbox. A staff screen that hides the
+ * sentinel is a staff screen where nobody can tell whether a plan says
+ * unlimited or nothing at all.
+ */
+function AllowanceForm({ plan, onSave, saving }: { plan: Plan; onSave: (next: Plan) => void; saving: boolean }) {
+    const [draft, setDraft] = useState<Plan>(plan);
+    const dirty = JSON.stringify(draft) !== JSON.stringify(plan);
+
+    return (
+        <div className="space-y-3">
+            <div className="grid gap-2 sm:grid-cols-2 lg:grid-cols-3">
+                {LIMIT_FIELDS.map((f) => (
+                    <label key={f.key} className="block">
+                        <span className="mb-1 block text-[0.78rem] text-ink-3">{f.label}</span>
+                        <input
+                            type="number"
+                            value={draft.base_limits[f.key]}
+                            onChange={(e) =>
+                                setDraft({
+                                    ...draft,
+                                    base_limits: {
+                                        ...draft.base_limits,
+                                        [f.key]: Number(e.target.value),
+                                    },
+                                })
+                            }
+                            className="w-full rounded border border-rule bg-panel px-2 py-1.5 text-[0.85rem] text-ink"
+                        />
+                        <span className="mt-0.5 block text-[0.72rem] text-ink-3">−1 is unlimited</span>
+                    </label>
+                ))}
+                <label className="block">
+                    <span className="mb-1 block text-[0.78rem] text-ink-3">Support level</span>
+                    <select
+                        value={draft.support_level}
+                        onChange={(e) => setDraft({ ...draft, support_level: e.target.value })}
+                        className="w-full rounded border border-rule bg-panel px-2 py-1.5 text-[0.85rem] text-ink"
+                    >
+                        {SUPPORT_LEVELS.map((s) => (
+                            <option key={s.value} value={s.value}>
+                                {s.label}
+                            </option>
+                        ))}
+                    </select>
+                </label>
+            </div>
+
+            <label className="flex items-center gap-2 text-[0.85rem] text-ink-2">
+                <input type="checkbox" checked={draft.active} onChange={(e) => setDraft({ ...draft, active: e.target.checked })} />
+                Offered to customers
+            </label>
+
+            <p className="text-[0.78rem] text-ink-3">Changes apply to licences issued from now on. Existing licences snapshotted their plan and are unaffected.</p>
+
+            <button type="button" disabled={!dirty || saving} onClick={() => onSave(draft)} className="rounded border border-accent/50 px-3 py-1.5 text-[0.85rem] text-accent disabled:opacity-40">
+                {saving ? "Saving…" : "Save allowances"}
+            </button>
+        </div>
+    );
+}
+
+export default function PlansPage() {
+    const qc = useQueryClient();
+    const plans = useQuery({ queryKey: ["plans"], queryFn: api.staff.plans });
+    const licenses = useQuery({
+        queryKey: ["staff-licenses"],
+        queryFn: () => api.staff.licenses(),
+    });
+    const [draft, setDraft] = useState<Plan | null>(null);
+    const [saving, setSaving] = useState<string | null>(null);
+
+    const save = useMutation({
+        mutationFn: (p: Plan) => api.staff.updatePlan(p.deployment, p.tier, p),
+        onSuccess: () => {
+            qc.invalidateQueries({ queryKey: ["plans"] });
+            setDraft(null);
+            setSaving(null);
+        },
+        onError: () => setSaving(null),
+    });
+
+    const original = plans.data?.find((p) => p.deployment === draft?.deployment && p.tier === draft?.tier);
+
+    return (
+        <div className="grid gap-6">
+            <PageHeader
+                title="Plans"
+                subtitle="The authoritative tier table six plans, two deployments by three tiers, base allowances only. Every issued licence snapshots the plan it was cut from, so editing one never rewrites an existing licence."
+            />
+
+            {draft && original && (
+                <ConfirmPlanChange
+                    plan={original}
+                    next={draft}
+                    issuedCount={(licenses.data ?? []).filter((l) => l.tier === draft.tier && l.deployment === draft.deployment).length}
+                    onConfirm={() => {
+                        setSaving(`${draft.deployment}/${draft.tier}`);
+                        save.mutate(draft);
+                    }}
+                    onCancel={() => setDraft(null)}
+                />
+            )}
+
+            {(["cloud", "self_hosted"] as const).map((deployment: Deployment) => (
+                <section key={deployment} className="space-y-3">
+                    <h2 className="text-[0.95rem] font-medium text-ink">{deployment === "cloud" ? "Cloud" : "Self-Hosted"}</h2>
+                    {(plans.data ?? [])
+                        .filter((p) => p.deployment === deployment)
+                        .map((p) => (
+                            <article key={`${p.deployment}/${p.tier}`} className="rounded-lg border border-rule bg-panel p-4">
+                                <header className="mb-3 flex items-baseline justify-between gap-3">
+                                    <h3 className="text-[0.9rem] font-medium text-ink">{p.name}</h3>
+                                    <span className="font-mono text-[0.75rem] text-ink-3">
+                                        {p.deployment}/{p.tier}
+                                    </span>
+                                </header>
+                                <AllowanceForm plan={p} saving={saving === `${p.deployment}/${p.tier}`} onSave={(next: Plan) => setDraft(next)} />
+                            </article>
+                        ))}
+                </section>
+            ))}
+        </div>
+    );
+}

adminsite/app/accept-invite/page.tsx

@@ -0,0 +1,76 @@
+"use client";
+
+import { useMutation } from "@tanstack/react-query";
+import Link from "next/link";
+import { useSearchParams } from "next/navigation";
+import { Suspense, useState } from "react";
+import { ApiError, api } from "@/lib/api";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+
+function AcceptForm() {
+    const token = useSearchParams().get("token") ?? "";
+    const [password, setPassword] = useState("");
+    const [error, setError] = useState<string | null>(null);
+    const [done, setDone] = useState(false);
+
+    const accept = useMutation({
+        mutationFn: () => api.acceptInvite(token, password),
+        onSuccess: () => setDone(true),
+        onError: (e) =>
+            setError(e instanceof ApiError ? e.message : "Something went wrong. Try again."),
+    });
+
+    if (!token) return <p className="text-ink-2">That link is missing its token.</p>;
+    if (done)
+        return (
+            <div className="grid gap-3">
+                <h1 className="text-3xl">You&apos;re in</h1>
+                <p className="text-ink-2">Sign in with your email address and new password.</p>
+                <Link href="/login" className="font-semibold text-accent underline">
+                    Sign in
+                </Link>
+            </div>
+        );
+
+    return (
+        <form
+            className="grid max-w-md gap-4"
+            onSubmit={(e) => {
+                e.preventDefault();
+                setError(null);
+                accept.mutate();
+            }}
+        >
+            <h1 className="text-3xl">Choose a password</h1>
+            <p className="text-ink-2">
+                This password signs you into Vantage HQ and into every instance you are given
+                access to. Nobody who invited you can see it.
+            </p>
+            <Field
+                label="New password"
+                type="password"
+                autoComplete="new-password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                required
+                minLength={12}
+                hint="At least 12 characters."
+                error={error ?? undefined}
+            />
+            <Button type="submit" disabled={accept.isPending || password.length < 12}>
+                {accept.isPending ? "Setting…" : "Set password"}
+            </Button>
+        </form>
+    );
+}
+
+export default function AcceptInvitePage() {
+    return (
+        <main className="mx-auto max-w-rail px-5 py-16">
+            <Suspense fallback={<p className="text-ink-3">Loading…</p>}>
+                <AcceptForm />
+            </Suspense>
+        </main>
+    );
+}

adminsite/app/globals.css

@@ -0,0 +1,178 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+/* ==========================================================================
+   Vantage admin console design tokens.
+
+   Lines 8-97 below are site/app/globals.css's token blocks, copied verbatim:
+   the marketing site and this console are one visual system. Change them in
+   both apps in the same commit — nothing enforces the match automatically.
+
+   Light is the default because web/ is locked to dark, and telling the two
+   apart at a glance is what stops a Reissue landing in the wrong tab. In dark
+   mode the accent lifts to #5b9be8, which is nearer web/'s indigo, so the
+   distinction leans on the ground rather than the hue.
+   ========================================================================== */
+
+:root {
+    color-scheme: light dark;
+
+    --ground: #eaedf3;
+    --panel: #ffffff;
+    --panel-2: #f4f6fa;
+    --ink: #0a1b33;
+    --ink-2: #41556f;
+    --ink-3: #6c7f96;
+    --rule: #cdd6e2;
+    --rule-soft: #e0e6ef;
+    --accent: #0b2a58;
+    --accent-ink: #ffffff;
+    --up: #2f8a60;
+    --down: #c6462f;
+    --pend: #b0801f;
+    --shadow: 0 1px 0 rgba(10, 27, 51, 0.05), 0 18px 40px -26px rgba(10, 27, 51, 0.45);
+    --logo: #0b2a58;
+
+    --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+    --mono: ui-monospace, "Cascadia Mono", "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
+
+    --s--1: clamp(0.76rem, 0.74rem + 0.1vw, 0.81rem);
+    --s-0: clamp(1rem, 0.97rem + 0.14vw, 1.05rem);
+    --s-1: clamp(1.16rem, 1.09rem + 0.32vw, 1.36rem);
+    --s-2: clamp(1.5rem, 1.34rem + 0.74vw, 2rem);
+    --s-3: clamp(2rem, 1.66rem + 1.6vw, 3.1rem);
+    --s-4: clamp(2.6rem, 1.9rem + 3.3vw, 4.9rem);
+
+    --rail: 1200px;
+}
+
+/* Dark tokens are defined once and applied through three selectors: the OS
+   preference, and both explicit values of data-theme so the in-page toggle
+   wins in either direction. */
+@media (prefers-color-scheme: dark) {
+    :root {
+        --ground: #071628;
+        --panel: #0d2138;
+        --panel-2: #102842;
+        --ink: #e4ecf6;
+        --ink-2: #9fb3ca;
+        --ink-3: #71879f;
+        --rule: #1e3855;
+        --rule-soft: #172c44;
+        --accent: #5b9be8;
+        --accent-ink: #04101f;
+        --up: #4fb484;
+        --down: #e2705a;
+        --pend: #d6a63f;
+        --shadow: 0 1px 0 rgba(0, 0, 0, 0.35), 0 20px 44px -26px rgba(0, 0, 0, 0.85);
+        --logo: #7fb2f0;
+    }
+}
+
+:root[data-theme="dark"] {
+    --ground: #071628;
+    --panel: #0d2138;
+    --panel-2: #102842;
+    --ink: #e4ecf6;
+    --ink-2: #9fb3ca;
+    --ink-3: #71879f;
+    --rule: #1e3855;
+    --rule-soft: #172c44;
+    --accent: #5b9be8;
+    --accent-ink: #04101f;
+    --up: #4fb484;
+    --down: #e2705a;
+    --pend: #d6a63f;
+    --shadow: 0 1px 0 rgba(0, 0, 0, 0.35), 0 20px 44px -26px rgba(0, 0, 0, 0.85);
+    --logo: #7fb2f0;
+}
+
+:root[data-theme="light"] {
+    --ground: #eaedf3;
+    --panel: #ffffff;
+    --panel-2: #f4f6fa;
+    --ink: #0a1b33;
+    --ink-2: #41556f;
+    --ink-3: #6c7f96;
+    --rule: #cdd6e2;
+    --rule-soft: #e0e6ef;
+    --accent: #0b2a58;
+    --accent-ink: #ffffff;
+    --up: #2f8a60;
+    --down: #c6462f;
+    --pend: #b0801f;
+    --shadow: 0 1px 0 rgba(10, 27, 51, 0.05), 0 18px 40px -26px rgba(10, 27, 51, 0.45);
+    --logo: #0b2a58;
+}
+
+/* Not in site/: the hatched sandbox badge and hover washes need a tinted fill,
+   and deriving it at each use would drift. */
+:root {
+    --accent-wash: rgba(11, 42, 88, 0.07);
+}
+
+@media (prefers-color-scheme: dark) {
+    :root {
+        --accent-wash: rgba(91, 155, 232, 0.1);
+    }
+}
+
+:root[data-theme="dark"] {
+    --accent-wash: rgba(91, 155, 232, 0.1);
+}
+
+:root[data-theme="light"] {
+    --accent-wash: rgba(11, 42, 88, 0.07);
+}
+
+*,
+*::before,
+*::after {
+    box-sizing: border-box;
+}
+
+body {
+    margin: 0;
+    background: var(--ground);
+    color: var(--ink);
+    font-family: var(--sans);
+    font-size: var(--s-0);
+    line-height: 1.6;
+    -webkit-font-smoothing: antialiased;
+}
+
+/* site/'s heading treatment, which is what replaces a display face. */
+h1,
+h2,
+h3 {
+    margin: 0;
+    font-weight: 800;
+    line-height: 1.03;
+    letter-spacing: -0.03em;
+    text-wrap: balance;
+}
+
+p {
+    margin: 0;
+}
+
+code {
+    font-family: var(--mono);
+    font-size: 0.92em;
+}
+
+:focus-visible {
+    outline: 2px solid var(--accent);
+    outline-offset: 3px;
+    border-radius: 2px;
+}
+
+@media (prefers-reduced-motion: reduce) {
+    *,
+    *::before,
+    *::after {
+        animation-duration: 0.001ms !important;
+        transition-duration: 0.001ms !important;
+    }
+}

adminsite/app/layout.tsx

@@ -0,0 +1,28 @@
+import type { Metadata } from "next";
+import "./globals.css";
+import { Providers } from "@/components/Providers";
+import { THEME_BOOT_SCRIPT } from "@/lib/theme";
+
+export const metadata: Metadata = {
+    title: "Vantage HQ",
+    description: "Licences, instances and billing for Vantage.",
+};
+
+/*
+ * The masthead deliberately does NOT live here. It belongs to the authenticated
+ * layouts, so /login, /verify and /accept-invite stop rendering a bar
+ * whose navigation and account menu they cannot use.
+ */
+export default function RootLayout({ children }: { children: React.ReactNode }) {
+    return (
+        <html lang="en">
+            <head>
+                {/* Runs before first paint, so a dark-preferring viewer never sees white. */}
+                <script dangerouslySetInnerHTML={{ __html: THEME_BOOT_SCRIPT }} />
+            </head>
+            <body>
+                <Providers>{children}</Providers>
+            </body>
+        </html>
+    );
+}

adminsite/app/login/page.tsx

@@ -0,0 +1,119 @@
+"use client";
+
+import { useRouter } from "next/navigation";
+import { useState } from "react";
+import { API_BASE, ApiError, NotConnected, api } from "@/lib/api";
+import { NotConnectedPanel } from "@/components/NotConnected";
+import { Button } from "@/components/Button";
+import { Field } from "@/components/Field";
+
+const SITE_URL = (process.env.NEXT_PUBLIC_SITE_URL ?? "").replace(/\/$/, "");
+
+export default function LoginPage() {
+    const router = useRouter();
+    const [email, setEmail] = useState("");
+    const [password, setPassword] = useState("");
+    const [staff, setStaff] = useState(false);
+    const [error, setError] = useState<string | null>(null);
+    const [offline, setOffline] = useState(false);
+    const [busy, setBusy] = useState(false);
+
+    async function submit(e: React.FormEvent) {
+        e.preventDefault();
+        setBusy(true);
+        setError(null);
+        try {
+            const s = staff
+                ? await api.staffLogin(email, password)
+                : await api.login(email, password);
+            router.replace(s.kind === "staff" ? "/staff" : "/");
+        } catch (err) {
+            if (err instanceof NotConnected) setOffline(true);
+            else if (err instanceof ApiError) setError(err.message);
+            else setError("Sign in failed. Try again.");
+        } finally {
+            setBusy(false);
+        }
+    }
+
+    if (offline)
+        return (
+            <Main>
+                <NotConnectedPanel url={API_BASE} />
+            </Main>
+        );
+
+    return (
+        <Main>
+            {/* The masthead's lockup, unlinked: there is nowhere to go yet. */}
+            <div className="mb-7 flex flex-col items-center gap-2 text-center">
+                <span className="flex items-baseline gap-2 text-[1.5rem] font-extrabold tracking-[-0.02em]">
+                    Vantage
+                    <span className="font-mono text-[0.78rem] font-normal uppercase tracking-[0.14em] text-ink-3">
+                        HQ
+                    </span>
+                </span>
+                <h1 className="text-[1.16rem]">Sign in</h1>
+                <p className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">
+                    Licences · instances · billing
+                </p>
+            </div>
+
+            <div className="rounded border border-rule bg-panel p-6 shadow-[var(--shadow)]">
+                <form onSubmit={submit} className="grid gap-4">
+                    <Field
+                        label="Email"
+                        type="email"
+                        autoComplete="username"
+                        required
+                        value={email}
+                        onChange={(e) => setEmail(e.target.value)}
+                    />
+                    <Field
+                        label="Password"
+                        type="password"
+                        autoComplete="current-password"
+                        required
+                        value={password}
+                        onChange={(e) => setPassword(e.target.value)}
+                        error={error ?? undefined}
+                    />
+                    <label className="flex items-center gap-2 text-[0.82rem] text-ink-2">
+                        <input
+                            type="checkbox"
+                            checked={staff}
+                            onChange={(e) => setStaff(e.target.checked)}
+                            className="accent-[var(--accent)]"
+                        />
+                        I work at Vantage
+                    </label>
+                    <Button type="submit" disabled={busy} className="w-full justify-center">
+                        {busy ? "Signing in…" : "Sign in"}
+                    </Button>
+                </form>
+
+                {SITE_URL && (
+                    <>
+                        <div className="my-5 h-px bg-rule-soft" />
+
+                        {/* Signup lives on the marketing site's /start, not here. */}
+                        <p className="text-center text-[0.82rem] text-ink-3">
+                            No account?{" "}
+                            <a href={`${SITE_URL}/start`} className="text-accent underline">
+                                Create one
+                            </a>
+                        </p>
+                    </>
+                )}
+            </div>
+        </Main>
+    );
+}
+
+function Main({ children }: { children: React.ReactNode }) {
+    return (
+        <main className="mx-auto flex min-h-screen w-full max-w-[26rem] flex-col justify-center px-5 py-12">
+            {children}
+        </main>
+    );
+}

adminsite/app/not-found.tsx

@@ -0,0 +1,15 @@
+import Link from "next/link";
+
+export default function NotFound() {
+    return (
+        <main className="mx-auto max-w-rail px-5 py-12">
+            <h1 className="text-3xl">Nothing here</h1>
+            <p className="mt-2 text-ink-2">
+                That page does not exist, or it belongs to an account you are not signed in to.
+            </p>
+            <Link href="/" className="mt-4 inline-block text-accent underline">
+                Back to your account
+            </Link>
+        </main>
+    );
+}

adminsite/app/verify/page.tsx

@@ -0,0 +1,74 @@
+"use client";
+
+import { useQuery } from "@tanstack/react-query";
+import { useRouter, useSearchParams } from "next/navigation";
+import Link from "next/link";
+import { Suspense, useEffect } from "react";
+import { api } from "@/lib/api";
+
+function Verify() {
+    const router = useRouter();
+    const token = useSearchParams().get("token") ?? "";
+    const { data, error, isLoading } = useQuery({
+        queryKey: ["verify", token],
+        queryFn: () => api.verify(token),
+        enabled: token !== "",
+        retry: false,
+    });
+
+    // An invitation and a verification link are the same shape, and someone will
+    // paste one into the other. The backend leaves an invite token unspent and
+    // says so; send them where they can actually finish.
+    const needsPassword = data?.needs_password === true;
+    useEffect(() => {
+        if (needsPassword) {
+            router.replace(`/accept-invite?token=${encodeURIComponent(token)}`);
+        }
+    }, [needsPassword, token, router]);
+    if (needsPassword) return <Message title="One moment…" body="Taking you to set a password." />;
+
+    if (!token)
+        return (
+            <Message
+                title="That link is incomplete"
+                body="It is missing its token. Use the link in the email exactly as sent."
+            />
+        );
+    if (isLoading) return <Message title="Verifying…" body="One moment." />;
+    if (error || !data?.verified)
+        return (
+            <Message
+                title="That link is invalid or has expired"
+                body="Links last 24 hours and can only be used once. Sign up again to get a fresh one."
+            />
+        );
+
+    return (
+        <div className="grid max-w-xl gap-3">
+            <h1 className="text-3xl">Email verified</h1>
+            <p className="text-ink-2">Your account is ready.</p>
+            <Link href="/login" className="justify-self-start text-accent underline">
+                Sign in
+            </Link>
+        </div>
+    );
+}
+
+function Message({ title, body }: { title: string; body: string }) {
+    return (
+        <div className="grid max-w-xl gap-3">
+            <h1 className="text-3xl">{title}</h1>
+            <p className="text-ink-2">{body}</p>
+        </div>
+    );
+}
+
+export default function VerifyPage() {
+    return (
+        <main className="mx-auto max-w-rail px-5 py-12">
+            <Suspense fallback={null}>
+                <Verify />
+            </Suspense>
+        </main>
+    );
+}

adminsite/components/AccountMenu.tsx

@@ -0,0 +1,149 @@
+"use client";
+
+import { useMutation, useQueryClient } from "@tanstack/react-query";
+import Link from "next/link";
+import { useRouter } from "next/navigation";
+import { useEffect, useRef, useState } from "react";
+import { api } from "@/lib/api";
+import { useSession } from "@/lib/session";
+import { useTheme, type ThemePref } from "@/lib/theme";
+
+const APPEARANCE: { value: ThemePref; label: string }[] = [
+    { value: "light", label: "Light" },
+    { value: "dark", label: "Dark" },
+    { value: "system", label: "System" },
+];
+
+/*
+ * Everything here is about YOU rather than about the account: your settings,
+ * your password, how you want the app to look, and leaving. None of it is a
+ * destination worth a slot in the primary nav, which is why Settings moved off
+ * the bar and into this menu.
+ */
+export function AccountMenu({ staff = false }: { staff?: boolean }) {
+    const { session } = useSession();
+    const [open, setOpen] = useState(false);
+    const [pref, setPref] = useTheme();
+    const wrap = useRef<HTMLDivElement>(null);
+    const router = useRouter();
+    const qc = useQueryClient();
+
+    useEffect(() => {
+        if (!open) return;
+        const onDown = (e: MouseEvent) => {
+            if (wrap.current && !wrap.current.contains(e.target as Node)) setOpen(false);
+        };
+        const onKey = (e: KeyboardEvent) => {
+            if (e.key === "Escape") setOpen(false);
+        };
+        document.addEventListener("mousedown", onDown);
+        document.addEventListener("keydown", onKey);
+        return () => {
+            document.removeEventListener("mousedown", onDown);
+            document.removeEventListener("keydown", onKey);
+        };
+    }, [open]);
+
+    const signOut = useMutation({
+        mutationFn: api.logout,
+        // Clear the cache before leaving: a cached account response outliving
+        // the session would show the next person who signs in on this browser
+        // the previous account's name for a beat.
+        onSettled: () => {
+            qc.clear();
+            router.replace("/login");
+        },
+    });
+
+    const email = session?.email ?? "";
+    const initials =
+        email
+            .split("@")[0]
+            .split(/[.\-_]/)
+            .slice(0, 2)
+            .map((p) => p[0]?.toUpperCase() ?? "")
+            .join("") || "?";
+
+    return (
+        <div className="relative" ref={wrap}>
+            <button
+                type="button"
+                onClick={() => setOpen((v) => !v)}
+                aria-expanded={open}
+                aria-haspopup="menu"
+                className={`flex items-center gap-2 rounded-sm border px-2 py-1 text-[0.8rem] ${
+                    open ? "border-accent text-ink" : "border-rule text-ink-2"
+                } bg-panel hover:border-ink-3`}
+            >
+                <span className="grid h-[18px] w-[18px] shrink-0 place-items-center rounded-full bg-accent font-mono text-[0.56rem] font-bold text-accent-ink">
+                    {initials}
+                </span>
+                <span className="hidden max-w-[16ch] truncate sm:inline">{email}</span>
+                <span aria-hidden className="text-[0.6rem] text-ink-3">
+                    ▾
+                </span>
+            </button>
+
+            {open && (
+                <div
+                    role="menu"
+                    // --shadow rather than a literal: globals.css defines it per
+                    // theme, and a hardcoded rgba would be a colour value living
+                    // in a component, which this app's tokens rule forbids.
+                    className="absolute right-0 top-[calc(100%+8px)] z-50 grid w-64 overflow-hidden rounded border border-rule bg-panel shadow-[var(--shadow)]"
+                >
+                    <div className="grid gap-0.5 border-b border-rule-soft px-3 py-2.5">
+                        <strong className="truncate text-[0.86rem]">{email}</strong>
+                        <span className="font-mono text-[0.66rem] uppercase tracking-[0.1em] text-ink-3">
+                            {staff ? "Vantage staff" : (session?.account_role ?? "member")}
+                        </span>
+                    </div>
+
+                    {!staff && (
+                        <Link
+                            href="/settings"
+                            role="menuitem"
+                            onClick={() => setOpen(false)}
+                            className="px-3 py-2 text-[0.86rem] text-ink hover:bg-accent-wash"
+                        >
+                            Settings
+                        </Link>
+                    )}
+
+                    <div className="grid gap-1.5 border-y border-rule-soft px-3 py-2.5">
+                        <span className="font-mono text-[0.66rem] uppercase tracking-[0.12em] text-ink-3">
+                            Appearance
+                        </span>
+                        <div className="flex overflow-hidden rounded-sm border border-rule">
+                            {APPEARANCE.map((a) => (
+                                <button
+                                    key={a.value}
+                                    type="button"
+                                    onClick={() => setPref(a.value)}
+                                    aria-pressed={pref === a.value}
+                                    className={`flex-1 px-0 py-1 font-mono text-[0.62rem] uppercase tracking-[0.08em] ${
+                                        pref === a.value
+                                            ? "bg-accent text-accent-ink"
+                                            : "bg-panel text-ink-3 hover:text-ink-2"
+                                    }`}
+                                >
+                                    {a.label}
+                                </button>
+                            ))}
+                        </div>
+                    </div>
+
+                    <button
+                        type="button"
+                        role="menuitem"
+                        onClick={() => signOut.mutate()}
+                        disabled={signOut.isPending}
+                        className="px-3 py-2 text-left text-[0.86rem] text-expired hover:bg-accent-wash"
+                    >
+                        {signOut.isPending ? "Signing out…" : "Sign out"}
+                    </button>
+                </div>
+            )}
+        </div>
+    );
+}

adminsite/components/AppBar.tsx

@@ -0,0 +1,79 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { AccountMenu } from "@/components/AccountMenu";
+import { EnvBadge } from "@/components/EnvBadge";
+
+export type NavLink = { href: string; label: string };
+
+/*
+ * One masthead in three zones: who you are acting as, where you can go, and
+ * which environment you are in.
+ *
+ * It replaces a brand bar and a separate nav strip. The nav's active state is
+ * derived from the pathname rather than hardcoded the previous customer nav
+ * marked Overview as current on every page, including the ones that weren't it.
+ *
+ * Staff sit on --panel-2 with a chip where the account name goes. web/ is locked
+ * to dark so this app defaults to light for the same reason CLAUDE.md gives:
+ * telling two consoles apart before you click Reissue. Staff and customer need
+ * that distinction from each other too, and one shade plus one chip buys it
+ * without a second palette.
+ */
+export function AppBar({ links, context, staff = false }: { links: NavLink[]; context?: React.ReactNode; staff?: boolean }) {
+    const pathname = usePathname();
+
+    const isCurrent = (href: string) =>
+        // The section root matches only exactly; deeper routes match by prefix,
+        // so /staff/accounts/:id still lights Accounts while /staff/accounts
+        // does not light Operations.
+        href === "/" || href === "/staff" ? pathname === href : pathname === href || pathname.startsWith(`${href}/`);
+
+    return (
+        <header className={`border-b border-rule ${staff ? "bg-panel-2" : "bg-panel"}`}>
+            <div className="mx-auto grid max-w-rail grid-cols-[auto_1fr_auto] items-center gap-4 px-5 md:gap-7">
+                <div className="col-start-1 row-start-1 flex min-w-0 items-center gap-3 py-2.5">
+                    <span className="flex items-baseline gap-2 text-[1.16rem] font-extrabold tracking-[-0.02em]">
+                        Vantage
+                        <span className="font-mono text-[0.72rem] font-normal uppercase tracking-[0.14em] text-ink-3">HQ</span>
+                    </span>
+                    {context && (
+                        <>
+                            <span aria-hidden className="hidden h-[22px] w-px bg-rule sm:block" />
+                            <span className="hidden min-w-0 sm:block">{context}</span>
+                        </>
+                    )}
+                </div>
+
+                <nav
+                    aria-label={staff ? "Staff" : "Account"}
+                    className="col-span-3 col-start-1 row-start-2 flex items-stretch gap-1 overflow-x-auto border-t border-rule-soft md:col-span-1 md:col-start-2 md:row-start-1 md:border-t-0"
+                >
+                    {links.map((l) => {
+                        const on = isCurrent(l.href);
+                        return (
+                            <Link
+                                key={l.href}
+                                href={l.href}
+                                aria-current={on ? "page" : undefined}
+                                className={`relative inline-flex shrink-0 items-center px-3 py-2.5 font-mono text-[0.72rem] uppercase tracking-[0.08em] md:py-0 ${
+                                    on ? "font-bold text-accent after:absolute after:inset-x-3 after:bottom-0 after:h-0.5 after:bg-accent after:content-['']" : "text-ink-3 hover:text-ink-2"
+                                }`}
+                            >
+                                {l.label}
+                            </Link>
+                        );
+                    })}
+                </nav>
+
+                <div className="col-start-3 row-start-1 flex items-center justify-end gap-2.5 py-2.5">
+                    <span className="hidden sm:block">
+                        <EnvBadge />
+                    </span>
+                    <AccountMenu staff={staff} />
+                </div>
+            </div>
+        </header>
+    );
+}

adminsite/components/Button.tsx

@@ -0,0 +1,43 @@
+import clsx from "clsx";
+import Link from "next/link";
+
+type Variant = "solid" | "line";
+
+/*
+ * Matches site/'s .btn--solid and .btn--line exactly, including the neutral
+ * border on the secondary variant. site/ does not have an accent-outlined
+ * button and this app should not invent one.
+ */
+export function buttonClass(variant: Variant = "solid", disabled = false, className?: string) {
+    return clsx(
+        "inline-flex items-center gap-2 rounded border px-4 py-2.5 text-[0.94rem] font-semibold",
+        "transition-[filter,border-color] duration-150 hover:brightness-110",
+        variant === "solid" ? "border-accent bg-accent text-accent-ink" : "border-rule bg-panel text-ink hover:border-ink-3",
+        disabled && "cursor-not-allowed border-rule bg-panel text-ink-3 hover:brightness-100",
+        className,
+    );
+}
+
+type Props = React.ButtonHTMLAttributes<HTMLButtonElement> & { variant?: Variant };
+
+export function Button({ variant = "solid", className, ...rest }: Props) {
+    return <button {...rest} className={buttonClass(variant, rest.disabled, className)} />;
+}
+
+/*
+ * A link that looks like a button. It exists so a navigation action never has to
+ * be an <a> wrapped around a <button> invalid markup, and it gives screen
+ * readers two nested controls where the page means one.
+ */
+export function LinkButton({ href, variant = "solid", external, className, children }: { href: string; variant?: Variant; external?: boolean; className?: string; children: React.ReactNode }) {
+    const cls = buttonClass(variant, false, className);
+    return external ? (
+        <a href={href} className={cls}>
+            {children}
+        </a>
+    ) : (
+        <Link href={href} className={cls}>
+            {children}
+        </Link>
+    );
+}

adminsite/components/CheckoutButton.tsx

@@ -0,0 +1,40 @@
+"use client";
+
+import { useState } from "react";
+import { initPaddle } from "@/lib/paddle";
+
+/* Opens the Paddle overlay with the resolved line items and custom_data. The
+ * items come from the configurator via catalogue pricing; custom_data is what
+ * lets the webhook route without a lookup table. */
+export function CheckoutButton({
+    items,
+    customData,
+    disabled,
+    label = "Continue to payment",
+}: {
+    items: { priceId: string; quantity: number }[];
+    customData: { account_id: string; instance_id: string };
+    disabled?: boolean;
+    label?: string;
+}) {
+    const [busy, setBusy] = useState(false);
+    async function open() {
+        setBusy(true);
+        const paddle = await initPaddle();
+        setBusy(false);
+        paddle?.Checkout.open({
+            items: items.map((i) => ({ priceId: i.priceId, quantity: i.quantity })),
+            customData,
+        });
+    }
+    return (
+        <button
+            type="button"
+            disabled={disabled || busy || items.length === 0}
+            onClick={open}
+            className="rounded border border-accent/50 px-3 py-1.5 text-[0.85rem] text-accent disabled:opacity-40"
+        >
+            {busy ? "Opening…" : label}
+        </button>
+    );
+}

adminsite/components/ConfirmPlanChange.tsx

@@ -0,0 +1,59 @@
+import type { Plan } from "@/lib/api";
+import { limitLabel } from "@/lib/format";
+import { Button } from "./Button";
+
+/*
+ * Editing a plan changes what every future customer gets, so the confirmation
+ * names each field rather than asking "are you sure". Existing licences
+ * snapshotted their plan at issue time and are genuinely unaffected saying so
+ * is what stops a well-meaning edit being followed by a panicked reissue.
+ */
+export function ConfirmPlanChange({ plan, next, issuedCount, onConfirm, onCancel }: { plan: Plan; next: Plan; issuedCount: number; onConfirm: () => void; onCancel: () => void }) {
+    const rows: { field: string; was: string; now: string }[] = [];
+    const fields = ["max_servers", "max_monitors", "max_secret_groups", "max_channels", "audit_retention_days"] as const;
+    for (const f of fields) {
+        if (plan.base_limits[f] !== next.base_limits[f])
+            rows.push({
+                field: f,
+                was: limitLabel(plan.base_limits[f]),
+                now: limitLabel(next.base_limits[f]),
+            });
+    }
+    if (plan.support_level !== next.support_level)
+        rows.push({
+            field: "support_level",
+            was: plan.support_level || "none",
+            now: next.support_level || "none",
+        });
+    if (plan.base_features.join(",") !== next.base_features.join(","))
+        rows.push({
+            field: "features",
+            was: plan.base_features.join(", ") || "none",
+            now: next.base_features.join(", ") || "none",
+        });
+
+    return (
+        <div className="grid max-w-xl gap-3 rounded border border-warn bg-panel p-5">
+            <h2 className="text-xl">Change what {plan.name} grants?</h2>
+            <ul className="grid gap-1 font-mono text-[0.82rem]">
+                {rows.map((r) => (
+                    <li key={r.field} className="flex flex-wrap gap-2">
+                        <span className="text-ink-3">{r.field}</span>
+                        <span className="text-ink-3 line-through">{r.was}</span>
+                        <span className="font-semibold text-ink">→ {r.now}</span>
+                    </li>
+                ))}
+                {rows.length === 0 && <li className="text-ink-3">Nothing would change.</li>}
+            </ul>
+            <p className="text-[0.82rem] text-ink-3">This applies to licences issued from now on. The {issuedCount} licences already issued keep what they were signed with until each is reissued.</p>
+            <div className="flex flex-wrap gap-3">
+                <Button type="button" onClick={onConfirm}>
+                    Change plan
+                </Button>
+                <Button type="button" variant="line" onClick={onCancel}>
+                    Keep as is
+                </Button>
+            </div>
+        </div>
+    );
+}

adminsite/components/EnvBadge.tsx

@@ -0,0 +1,22 @@
+/*
+ * Sandbox is hatched as well as coloured, so it survives a colourblind reader
+ * and a glance. It sits in the same place on every screen: issuing against the
+ * wrong environment should feel wrong before you click.
+ */
+const ENV = process.env.NEXT_PUBLIC_ADMIN_ENV === "sandbox" ? "sandbox" : "production";
+
+export function EnvBadge() {
+    const sandbox = ENV === "sandbox";
+    return (
+        <span
+            className={
+                sandbox
+                    ? "inline-flex items-center gap-2 rounded-sm border border-warn px-2 py-1 font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink [background-image:repeating-linear-gradient(-45deg,var(--accent-wash)_0_6px,transparent_6px_12px)]"
+                    : "inline-flex items-center gap-2 rounded-sm bg-accent px-2 py-1 font-mono text-[0.72rem] uppercase tracking-[0.1em] text-accent-ink"
+            }
+        >
+            <i className="h-1.5 w-1.5 shrink-0 rounded-full bg-current" />
+            {sandbox ? "Sandbox" : "Production"}
+        </span>
+    );
+}

adminsite/components/Field.tsx

@@ -0,0 +1,27 @@
+export function Field({
+    label,
+    hint,
+    error,
+    ...input
+}: React.InputHTMLAttributes<HTMLInputElement> & {
+    label: string;
+    hint?: React.ReactNode;
+    error?: string;
+}) {
+    return (
+        <label className="grid max-w-md gap-1.5">
+            <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">
+                {label}
+            </span>
+            <input
+                {...input}
+                className="rounded border border-rule bg-panel-2 px-2.5 py-2 font-mono text-ink"
+            />
+            {error ? (
+                <span className="text-[0.82rem] text-expired">{error}</span>
+            ) : hint ? (
+                <span className="text-[0.82rem] text-ink-3">{hint}</span>
+            ) : null}
+        </label>
+    );
+}

adminsite/components/InstanceRecord.tsx

@@ -0,0 +1,210 @@
+"use client";
+
+import Link from "next/link";
+import clsx from "clsx";
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useEffect, useState } from "react";
+import { api, type Instance, type License } from "@/lib/api";
+import { daysRemaining, formatDate, licenceState, limitLabel } from "@/lib/format";
+import { StatePill } from "./StatePill";
+import { Button, LinkButton } from "./Button";
+
+const STRIPE = {
+    valid: "before:bg-valid",
+    warn: "before:bg-warn",
+    expired: "before:bg-expired",
+    none: "before:bg-accent",
+} as const;
+
+const KEY = (id: string) => `vantage-hq-record-open:${id}`;
+
+/*
+ * One instance, open or closed.
+ *
+ * Closed it is a row name, tier, host, term bar, state. Open it adds what the
+ * licence includes, who can sign in, and the actions. Deliberately ONE component
+ * rather than a card and a detail panel: two components meant a single-instance
+ * account got a third of a row of summary with its substance a click away, and
+ * a six-instance account got a grid of summaries with no way to look closer.
+ *
+ * It defaults open when it is the only instance or when it needs attention,
+ * because the thing that needs you is the thing that should be open. A manual
+ * toggle is remembered per instance and beats the default from then on.
+ */
+export function InstanceRecord({ instance, license, reapAfterDays, defaultOpen = false }: { instance: Instance; license?: License; reapAfterDays?: number; defaultOpen?: boolean }) {
+    const state = licenceState(license?.expires_at, Boolean(license));
+    const days = license ? daysRemaining(license.expires_at) : 0;
+    const cloud = instance.deployment === "cloud";
+    const termDays = instance.tier === "free" ? 30 : 365;
+    const deleteInDays = license && reapAfterDays ? daysRemaining(license.expires_at) + reapAfterDays : null;
+
+    const [open, setOpen] = useState(defaultOpen);
+    useEffect(() => {
+        const saved = localStorage.getItem(KEY(instance.instance_id));
+        if (saved !== null) setOpen(saved === "1");
+    }, [instance.instance_id]);
+
+    const toggle = () => {
+        setOpen((v) => {
+            localStorage.setItem(KEY(instance.instance_id), v ? "0" : "1");
+            return !v;
+        });
+    };
+
+    const qc = useQueryClient();
+    const renew = useMutation({
+        mutationFn: () => api.renewInstance(instance.instance_id),
+        onSuccess: () => qc.invalidateQueries({ queryKey: ["account"] }),
+    });
+    const canRenew = instance.tier === "free" && license !== undefined && days <= 7;
+
+    // Only fetched once the record is open, and only for cloud: a self-hosted
+    // install manages its own users and the endpoint refuses it.
+    const members = useQuery({
+        queryKey: ["members", instance.instance_id],
+        queryFn: () => api.members(instance.instance_id),
+        enabled: open && cloud,
+    });
+
+    const panelId = `record-${instance.instance_id}`;
+
+    return (
+        <article className={clsx("relative grid gap-3.5 rounded border border-rule bg-panel p-4 pl-5", "before:absolute before:inset-y-0 before:left-0 before:w-1 before:content-['']", STRIPE[state])}>
+            <div className="flex flex-wrap items-start justify-between gap-3">
+                <div className="min-w-0">
+                    <h2 className="text-[1.22rem]">{instance.name || "Unnamed instance"}</h2>
+                    <p className="mt-1 font-mono text-[0.68rem] uppercase tracking-[0.1em] text-ink-3">
+                        {cloud ? "Cloud" : "Self-hosted"}
+                        {instance.tier ? ` · ${instance.tier.replace("_", " ")}` : ""}
+                        {` · created ${formatDate(instance.created_at)}`}
+                    </p>
+                    {cloud && instance.slug && (
+                        <a href={`https://${instance.slug}.vantage.hostxtra.co.uk`} className="mt-1.5 inline-block font-mono text-[0.78rem] text-accent underline">
+                            {instance.slug}.vantage.hostxtra.co.uk &rarr;
+                        </a>
+                    )}
+                </div>
+
+                <div className="flex shrink-0 items-center gap-2.5">
+                    <StatePill state={state} />
+                    <button
+                        type="button"
+                        onClick={toggle}
+                        aria-expanded={open}
+                        aria-controls={panelId}
+                        aria-label={open ? "Hide details" : "Show details"}
+                        className="grid h-[26px] w-[26px] place-items-center rounded-sm border border-rule bg-panel text-[0.6rem] text-ink-3 hover:border-accent hover:text-accent"
+                    >
+                        <span aria-hidden className={clsx("block transition-transform", open && "rotate-180")}>
+                            ▲
+                        </span>
+                    </button>
+                </div>
+            </div>
+
+            {license && state !== "expired" && (
+                <div className="grid max-w-md gap-1.5">
+                    <div className="flex justify-between font-mono text-[0.78rem] tabular-nums text-ink-2">
+                        <span>{days} days remaining</span>
+                        <span>Renews {formatDate(license.expires_at)}</span>
+                    </div>
+                    <div className="h-1 overflow-hidden rounded-sm bg-rule-soft">
+                        <div
+                            className={clsx("h-full", state === "warn" ? "bg-warn" : "bg-valid")}
+                            style={{
+                                width: `${Math.max(2, Math.min(100, (days / termDays) * 100))}%`,
+                            }}
+                        />
+                    </div>
+                </div>
+            )}
+
+            {state === "expired" && (
+                <div className="grid gap-1">
+                    <p className="text-[0.82rem] text-ink-2">Servers and monitors are still running, and your agents keep their keys. Changes are disabled until you renew.</p>
+                    {deleteInDays !== null && (
+                        <p className="text-[0.82rem] font-semibold text-expired">
+                            {deleteInDays <= 0 ? "Scheduled for deletion." : `Deleted in ${deleteInDays} ${deleteInDays === 1 ? "day" : "days"} unless renewed.`}
+                        </p>
+                    )}
+                </div>
+            )}
+
+            {state === "none" && <p className="text-[0.82rem] text-ink-2">You have paid for this but it is not attached to an install yet, so no licence has been issued. Linking takes a minute.</p>}
+
+            <div id={panelId} className={clsx("gap-3.5", open ? "grid" : "hidden")}>
+                {license && (
+                    <div className="grid gap-2 border-t border-rule-soft pt-3">
+                        <p className="font-mono text-[0.68rem] uppercase tracking-[0.12em] text-ink-3">Included in {instance.tier?.replace("_", " ") ?? "this licence"}</p>
+                        <div className="flex flex-wrap gap-x-7 gap-y-2.5">
+                            <Stat n={limitLabel(license.limits.max_servers)} label="Servers" />
+                            <Stat n={limitLabel(license.limits.max_secret_groups)} label="Secret groups" />
+                            <Stat n={limitLabel(license.limits.max_channels)} label="Channels" />
+                            <Stat n={license.features.length ? license.features.join(" · ") : "None"} label="Features" quiet={license.features.length === 0} />
+                        </div>
+                    </div>
+                )}
+
+                {cloud && (
+                    <div className="grid gap-2 border-t border-rule-soft pt-3">
+                        <p className="font-mono text-[0.68rem] uppercase tracking-[0.12em] text-ink-3">Who can sign in</p>
+                        <div className="flex flex-wrap items-center gap-2">
+                            {(members.data ?? []).map((m) => (
+                                <span key={m.member_id} className="inline-flex items-center gap-1.5 rounded-full border border-rule-soft py-0.5 pl-0.5 pr-2.5 text-[0.78rem] text-ink-2">
+                                    <span className="grid h-[18px] w-[18px] place-items-center rounded-full bg-accent font-mono text-[0.56rem] font-bold text-accent-ink">
+                                        {m.email.slice(0, 2).toUpperCase()}
+                                    </span>
+                                    {m.email}
+                                </span>
+                            ))}
+                            {members.isLoading && <span className="text-[0.82rem] text-ink-3">Loading…</span>}
+                            {members.data?.length === 0 && <span className="text-[0.82rem] text-ink-3">Nobody yet.</span>}
+                            <Link href={`/instances/${instance.instance_id}`} className="text-[0.82rem] font-semibold text-accent underline">
+                                Manage access
+                            </Link>
+                        </div>
+                    </div>
+                )}
+
+                <div className="flex flex-wrap items-center gap-2.5">
+                    {state === "none" ? (
+                        // A paid placeholder (awaiting_link) claims its real install
+                        // UUID in place. Anything else without a licence gets one from
+                        // the purchase page (self-hosted Free is created there).
+                        instance.status === "awaiting_link" ? (
+                            <LinkButton href={`/instances/link?claim=${instance.instance_id}`}>Link an install</LinkButton>
+                        ) : (
+                            <LinkButton href="/purchase">Get a licence</LinkButton>
+                        )
+                    ) : cloud && instance.slug ? (
+                        <>
+                            <LinkButton external href={`https://${instance.slug}.vantage.hostxtra.co.uk`}>
+                                Open Cloud Instance
+                            </LinkButton>
+                            <LinkButton variant="line" href={`/instances/${instance.instance_id}`}>
+                                View Instance Settings
+                            </LinkButton>
+                        </>
+                    ) : (
+                        <LinkButton href={`/instances/${instance.instance_id}`}>View Instance Settings</LinkButton>
+                    )}
+
+                    {canRenew && (
+                        <Button type="button" variant="line" onClick={() => renew.mutate()} disabled={renew.isPending}>
+                            {renew.isPending ? "Renewing…" : "Renew"}
+                        </Button>
+                    )}
+                </div>
+            </div>
+        </article>
+    );
+}
+
+function Stat({ n, label, quiet }: { n: string; label: string; quiet?: boolean }) {
+    return (
+        <div className="grid gap-px">
+            <b className={clsx("tabular-nums tracking-[-0.02em]", quiet ? "text-[0.95rem] font-semibold text-ink-3" : "text-[1.18rem] font-extrabold")}>{n}</b>
+            <span className="font-mono text-[0.64rem] uppercase tracking-[0.1em] text-ink-3">{label}</span>
+        </div>
+    );
+}

adminsite/components/Ledger.tsx

@@ -0,0 +1,59 @@
+import clsx from "clsx";
+import type { License } from "@/lib/api";
+import { formatDate, formatStamp, limitLabel } from "@/lib/format";
+
+const REASON: Record<License["reason"], string> = {
+    new: "New",
+    renewal: "Renewal",
+    tier_change: "Tier change",
+    relink: "Relink",
+    manual: "Manual",
+};
+
+/*
+ * Licences are append-only: a renewal supersedes its predecessor rather than
+ * replacing it. So this is a ledger, not a table. Superseded rows stay visible
+ * and are overprinted the way a cancelled instrument is hiding them would
+ * destroy the only record of why an instance stopped working on a given date.
+ */
+export function Ledger({ licenses }: { licenses: License[] }) {
+    if (licenses.length === 0) {
+        return <p className="text-ink-2">No licence has ever been issued for this instance, so it is read-only.</p>;
+    }
+
+    return (
+        <ul className="grid">
+            {licenses.map((l) => {
+                const dead = Boolean(l.superseded_by);
+                return (
+                    <li key={l.license_id} className={clsx("grid gap-4 border-b border-rule-soft py-4 last:border-0 sm:grid-cols-[9.5rem_1fr]", dead && "text-ink-3")}>
+                        <div className="font-mono text-[0.72rem] tabular-nums text-ink-3">
+                            <b className={clsx("block text-[0.82rem] font-semibold", dead ? "text-ink-3" : "text-ink")}>{formatDate(l.issued_at)}</b>
+                            {formatStamp(l.issued_at)}
+                        </div>
+                        <div className="grid justify-items-start gap-1.5">
+                            {dead && (
+                                <span className="-rotate-2 rounded-sm border-2 border-archival px-1.5 py-0.5 font-mono text-[0.72rem] uppercase tracking-[0.18em] text-archival opacity-75">
+                                    Superseded
+                                </span>
+                            )}
+                            <p className="flex flex-wrap items-center gap-2 font-semibold">
+                                {l.tier.replace("_", " ")}
+                                <span className="rounded-sm border border-rule px-1.5 py-0.5 font-mono text-[0.72rem] font-normal uppercase tracking-[0.09em] text-accent">{REASON[l.reason]}</span>
+                            </p>
+                            <p className="font-mono text-[0.72rem] tabular-nums text-ink-3">
+                                {l.license_id.slice(0, 8)} · expires {formatDate(l.expires_at)} · {limitLabel(l.limits.max_servers)} servers · issued by {l.issued_by}
+                                {l.superseded_by && (
+                                    <>
+                                        {" "}
+                                        · replaced by <span className="text-accent underline">{l.superseded_by.slice(0, 8)}</span>
+                                    </>
+                                )}
+                            </p>
+                        </div>
+                    </li>
+                );
+            })}
+        </ul>
+    );
+}

adminsite/components/LicenceDelivery.tsx

@@ -0,0 +1,56 @@
+"use client";
+
+import { useState } from "react";
+import { Button } from "./Button";
+
+/*
+ * A licence blob is signed public data, not a secret it is useless on any
+ * instance other than the one it names. So it is safe to show inline, and
+ * showing it is what stops a blocked download from blocking a paying customer.
+ */
+export function LicenceDelivery({ instanceId, blob, downloadUrl }: { instanceId: string; blob: string; downloadUrl: string }) {
+    const [copied, setCopied] = useState(false);
+
+    async function copy() {
+        await navigator.clipboard.writeText(blob);
+        setCopied(true);
+        setTimeout(() => setCopied(false), 2000);
+    }
+
+    const steps = [
+        <>
+            Open <code className="rounded-sm bg-accent-wash px-1">Settings → Licence</code> on your install.
+        </>,
+        <>Paste the licence into the box and save.</>,
+        <>
+            The page reports <code className="rounded-sm bg-accent-wash px-1">Valid</code> straight away no restart.
+        </>,
+    ];
+
+    return (
+        <section className="grid gap-3">
+            <h2 className="text-xl">Your licence</h2>
+            <div className="flex flex-wrap items-center gap-3">
+                <a
+                    href={downloadUrl}
+                    download={`vantage-${instanceId}.lic`}
+                    className="inline-flex items-center gap-2 rounded border border-accent bg-accent px-4 py-2.5 text-[0.94rem] font-semibold text-accent-ink"
+                >
+                    Download licence
+                </a>
+                <Button variant="line" type="button" onClick={copy}>
+                    {copied ? "Copied" : "Copy to clipboard"}
+                </Button>
+            </div>
+            <pre className="max-h-48 overflow-y-auto whitespace-pre-wrap break-all rounded border border-dashed border-rule bg-panel-2 p-3 font-mono text-[0.72rem] text-ink-2">{blob}</pre>
+            <ol className="grid gap-2">
+                {steps.map((body, i) => (
+                    <li key={i} className="grid grid-cols-[1.6rem_1fr] gap-3 text-[0.82rem] text-ink-2">
+                        <span className="h-6 rounded-sm border border-rule text-center font-mono text-[0.72rem] leading-6 text-accent">{i + 1}</span>
+                        <span>{body}</span>
+                    </li>
+                ))}
+            </ol>
+        </section>
+    );
+}

adminsite/components/ManageBillingButton.tsx

@@ -0,0 +1,35 @@
+"use client";
+
+import { useState } from "react";
+import { ApiError, api } from "@/lib/api";
+import { Button } from "@/components/Button";
+
+/* Opens Paddle's hosted customer portal in a new tab. The account learns its
+ * paddle_customer_id from its first paid subscription's webhook, so this reports
+ * a plain message rather than erroring when there is no billing account yet. */
+export function ManageBillingButton() {
+    const [busy, setBusy] = useState(false);
+    const [note, setNote] = useState<string | null>(null);
+
+    async function open() {
+        setBusy(true);
+        setNote(null);
+        try {
+            const { url } = await api.billingPortal();
+            window.open(url, "_blank", "noopener");
+        } catch (e) {
+            setNote(e instanceof ApiError ? e.message : "Could not open billing.");
+        } finally {
+            setBusy(false);
+        }
+    }
+
+    return (
+        <span className="inline-flex items-center gap-2">
+            <Button type="button" variant="line" onClick={open} disabled={busy}>
+                {busy ? "Opening…" : "Manage billing"}
+            </Button>
+            {note && <span className="text-[0.78rem] text-ink-3">{note}</span>}
+        </span>
+    );
+}

adminsite/components/MembersPanel.tsx

@@ -0,0 +1,152 @@
+"use client";
+
+import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
+import { useState } from "react";
+import { ApiError, api, type InstanceRole } from "@/lib/api";
+import { useSession } from "@/lib/session";
+import { Button } from "@/components/Button";
+
+const ROLES: InstanceRole[] = ["owner", "admin", "member"];
+
+/*
+ * Absent entirely for self-hosted instances the backend refuses those, and a
+ * panel that renders controls the server will reject is a panel that lies.
+ */
+export function MembersPanel({ instanceId }: { instanceId: string }) {
+    const qc = useQueryClient();
+    const { session } = useSession();
+    const [selected, setSelected] = useState("");
+    const [role, setRole] = useState<InstanceRole>("member");
+    const [error, setError] = useState<string | null>(null);
+
+    const members = useQuery({
+        queryKey: ["members", instanceId],
+        queryFn: () => api.members(instanceId),
+    });
+    const people = useQuery({ queryKey: ["account-users"], queryFn: api.accountUsers });
+
+    const refresh = () => qc.invalidateQueries({ queryKey: ["members", instanceId] });
+    const fail = (e: unknown) => setError(e instanceof ApiError ? e.message : "Something went wrong. Try again.");
+
+    const grant = useMutation({
+        mutationFn: () => api.grantMember(instanceId, selected, role),
+        onSuccess: () => {
+            setSelected("");
+            setRole("member");
+            refresh();
+        },
+        onError: fail,
+    });
+    const changeRole = useMutation({
+        mutationFn: (v: { uid: string; role: InstanceRole }) => api.setMemberRole(instanceId, v.uid, v.role),
+        onSuccess: refresh,
+        onError: fail,
+    });
+    const revoke = useMutation({
+        mutationFn: (uid: string) => api.revokeMember(instanceId, uid),
+        onSuccess: refresh,
+        onError: fail,
+    });
+
+    const myRole = session?.account_role;
+    const canManage = myRole === "owner" || myRole === "admin";
+
+    const granted = new Set((members.data ?? []).map((m) => m.customer_user_id));
+    const candidates = (people.data ?? []).filter((p) => !granted.has(p.user_id) && p.verified_at);
+    const pending = (people.data ?? []).filter((p) => !p.verified_at).length;
+
+    return (
+        <section className="grid gap-4 rounded border border-rule bg-panel p-5">
+            <div className="grid gap-1">
+                <h2 className="text-xl">Who can sign in</h2>
+                <p className="text-[0.82rem] text-ink-2">Each person here has a real user inside this instance and signs in with their Vantage HQ password.</p>
+            </div>
+
+            {error && <p className="text-[0.9rem] text-expired">{error}</p>}
+
+            <ul className="grid gap-2">
+                {(members.data ?? []).map((m) => (
+                    <li key={m.member_id} className="flex flex-wrap items-center justify-between gap-3 border-b border-rule-soft pb-2">
+                        <span>{m.email}</span>
+                        <span className="flex items-center gap-3">
+                            {canManage ? (
+                                <select
+                                    value={m.role}
+                                    onChange={(e) =>
+                                        changeRole.mutate({
+                                            uid: m.customer_user_id,
+                                            role: e.target.value as InstanceRole,
+                                        })
+                                    }
+                                    className="rounded border border-rule bg-panel-2 px-2 py-1 font-mono text-[0.82rem] text-ink"
+                                >
+                                    {ROLES.map((r) => (
+                                        <option key={r} value={r}>
+                                            {r}
+                                        </option>
+                                    ))}
+                                </select>
+                            ) : (
+                                <span className="font-mono text-[0.82rem]">{m.role}</span>
+                            )}
+                            {canManage && (
+                                <button
+                                    type="button"
+                                    className="text-[0.82rem] font-semibold text-expired underline"
+                                    onClick={() => {
+                                        if (confirm(`Remove ${m.email} from this instance?`)) revoke.mutate(m.customer_user_id);
+                                    }}
+                                >
+                                    Remove
+                                </button>
+                            )}
+                        </span>
+                    </li>
+                ))}
+                {members.data?.length === 0 && <li className="text-ink-2">Nobody has been added yet.</li>}
+            </ul>
+
+            {canManage && (
+                <form
+                    className="flex flex-wrap items-end gap-3"
+                    onSubmit={(e) => {
+                        e.preventDefault();
+                        setError(null);
+                        if (selected) grant.mutate();
+                    }}
+                >
+                    <label className="grid gap-1.5">
+                        <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">Add someone</span>
+                        <select value={selected} onChange={(e) => setSelected(e.target.value)} className="rounded border border-rule bg-panel-2 px-2.5 py-2 font-mono text-ink">
+                            <option value="">Choose a person…</option>
+                            {candidates.map((p) => (
+                                <option key={p.user_id} value={p.user_id}>
+                                    {p.email}
+                                </option>
+                            ))}
+                        </select>
+                    </label>
+                    <label className="grid gap-1.5">
+                        <span className="font-mono text-[0.72rem] uppercase tracking-[0.1em] text-ink-3">Role here</span>
+                        <select value={role} onChange={(e) => setRole(e.target.value as InstanceRole)} className="rounded border border-rule bg-panel-2 px-2.5 py-2 font-mono text-ink">
+                            {ROLES.map((r) => (
+                                <option key={r} value={r}>
+                                    {r}
+                                </option>
+                            ))}
+                        </select>
+                    </label>
+                    <Button type="submit" disabled={!selected || grant.isPending}>
+                        {grant.isPending ? "Adding…" : "Add"}
+                    </Button>
+                </form>
+            )}
+
+            {canManage && pending > 0 && (
+                <p className="text-[0.82rem] text-ink-3">
+                    {pending} invited {pending === 1 ? "person has" : "people have"} not accepted yet and cannot be added until they do.
+                </p>
+            )}
+        </section>
+    );
+}

adminsite/components/NotConnected.tsx

@@ -0,0 +1,25 @@
+/*
+ * The deployment failure this repo makes most often, made legible. It names the
+ * variable, the value baked in, and both reasons it fails unreachable from
+ * the browser, or missing from admin's ADMIN_ORIGIN.
+ */
+export function NotConnectedPanel({ url }: { url: string }) {
+    return (
+        <div className="grid max-w-2xl gap-3 rounded border border-expired bg-panel p-5">
+            <h2 className="text-xl text-expired">Not connected to the licensing service</h2>
+            {url ? (
+                <p className="text-ink-2">
+                    This build points at <code className="text-ink">ADMIN_API_URL</code> = <code className="text-ink">{url}</code>, which did not respond.
+                </p>
+            ) : (
+                <p className="text-ink-2">
+                    <code className="text-ink">ADMIN_API_URL</code> was not set when this app was built, so there is nowhere to send requests.
+                </p>
+            )}
+            <p className="text-[0.82rem] text-ink-3">
+                The value is baked in when the image is built and has to be reachable from your browser, not just from the server. It also has to appear in the licensing service&rsquo;s{" "}
+                <code>ADMIN_ORIGIN</code>, or the browser blocks every request.
+            </p>
+        </div>
+    );
+}

adminsite/components/PageFrame.tsx

@@ -0,0 +1,49 @@
+/*
+ * Main column plus a fixed support rail.
+ *
+ * The rail is what stops a page being empty and the main column is what stops
+ * it being thin: an account with one instance used to render a third of a row
+ * of summary and nothing else. The rail carries what is true regardless of how
+ * many instances exist, so the page has a floor.
+ *
+ * It collapses below lg in source order, which puts the main column first on a
+ * phone. Nothing is hidden at any width if content only fits on a desktop it
+ * does not belong in the rail.
+ */
+export function PageFrame({ children, aside }: { children: React.ReactNode; aside?: React.ReactNode }) {
+    if (!aside) return <div className="grid gap-5">{children}</div>;
+
+    return (
+        <div className="grid items-start gap-5 lg:grid-cols-[minmax(0,1fr)_320px]">
+            <div className="grid min-w-0 gap-4">{children}</div>
+            <aside className="grid gap-3.5">{aside}</aside>
+        </div>
+    );
+}
+
+/** One card in the rail. Title is a label, not a heading you read for pleasure. */
+export function RailCard({ title, count, children }: { title: string; count?: number | string; children: React.ReactNode }) {
+    return (
+        <section className="grid gap-2.5 rounded border border-rule bg-panel p-3.5">
+            <header className="flex items-baseline justify-between gap-2.5">
+                <h2 className="font-mono text-[0.66rem] font-normal uppercase tracking-[0.12em] text-ink-3">{title}</h2>
+                {count !== undefined && <b className="text-[0.95rem] font-extrabold tabular-nums">{count}</b>}
+            </header>
+            {children}
+        </section>
+    );
+}
+
+/** Key/value rows for the rail. Values are mono so numbers line up. */
+export function RailFacts({ rows }: { rows: { label: string; value: React.ReactNode }[] }) {
+    return (
+        <dl className="grid gap-1.5">
+            {rows.map((r) => (
+                <div key={r.label} className="flex justify-between gap-2.5 text-[0.82rem]">
+                    <dt className="text-ink-3">{r.label}</dt>
+                    <dd className="m-0 truncate font-mono text-[0.78rem] tabular-nums text-ink">{r.value}</dd>
+                </div>
+            ))}
+        </dl>
+    );
+}

adminsite/components/PageHeader.tsx

@@ -0,0 +1,90 @@
+"use client";
+
+import Link from "next/link";
+import { useState } from "react";
+
+/*
+ * One record-line entry. `copy` marks the value as worth lifting to the
+ * clipboard an instance UUID or a licence ID, the strings people paste into
+ * support tickets.
+ */
+export type RecordField = { key: string; value: string; copy?: boolean };
+
+function CopyButton({ value }: { value: string }) {
+    const [done, setDone] = useState(false);
+    return (
+        <button
+            type="button"
+            onClick={async () => {
+                try {
+                    await navigator.clipboard.writeText(value);
+                    setDone(true);
+                    setTimeout(() => setDone(false), 1200);
+                } catch {
+                    // Clipboard is refused without a secure context or a user
+                    // gesture the browser trusts. The value is on screen and
+                    // selectable either way, so this needs no error state.
+                }
+            }}
+            className="rounded-sm border border-rule px-1.5 py-px font-mono text-[0.62rem] uppercase tracking-[0.1em] text-ink-3 hover:border-accent hover:text-accent"
+        >
+            {done ? "Copied" : "Copy"}
+        </button>
+    );
+}
+
+/*
+ * The page frame every screen starts with, replacing nine hand-rolled header
+ * blocks that each picked their own gaps and their own place for actions.
+ *
+ * The record line is the one new idea: Vantage HQ is a registry, so every screen
+ * is a record and records have reference numbers. Giving the reference a fixed
+ * slot, in mono, above the fold, means "where is the ID" stops being a per-page
+ * question. It costs one hairline rule.
+ */
+export function PageHeader({
+    back,
+    title,
+    subtitle,
+    actions,
+    record,
+    status,
+}: {
+    back?: { href: string; label: string };
+    title: string;
+    subtitle?: React.ReactNode;
+    actions?: React.ReactNode;
+    record?: RecordField[];
+    status?: React.ReactNode;
+}) {
+    return (
+        <header className="grid gap-3">
+            {back && (
+                <Link href={back.href} className="justify-self-start font-mono text-[0.7rem] uppercase tracking-[0.1em] text-ink-3 hover:text-accent">
+                    &larr; {back.label}
+                </Link>
+            )}
+
+            <div className="flex flex-wrap items-start justify-between gap-4">
+                <div className="min-w-0">
+                    <h1 className="text-[1.9rem]">{title}</h1>
+                    {subtitle && <p className="mt-1 text-[0.92rem] text-ink-2">{subtitle}</p>}
+                </div>
+                {actions && <div className="flex flex-wrap items-center gap-2">{actions}</div>}
+            </div>
+
+            {(record?.length || status) && (
+                <div className="flex flex-wrap items-center gap-x-5 gap-y-2.5 border-t border-rule pt-2.5">
+                    {record?.map((f) => (
+                        <span key={f.key} className="flex items-center gap-2">
+                            <span className="font-mono text-[0.64rem] uppercase tracking-[0.14em] text-ink-3">{f.key}</span>
+                            <span className="font-mono text-[0.78rem] tabular-nums text-ink-2">{f.value}</span>
+                            {f.copy && <CopyButton value={f.value} />}
+                        </span>
+                    ))}
+                    {status && <span className="ml-auto">{status}</span>}
+                </div>
+            )}
+        </header>
+    );
+}

adminsite/components/PlanConfigurator.tsx

@@ -0,0 +1,174 @@
+"use client";
+
+import { useMemo } from "react";
+import type { CatalogueRow, Deployment, Plan, Term, Tier } from "@/lib/api";
+import { featureLabel } from "@/lib/features";
+
+export interface PlanChoice {
+    tier: Tier;
+    term: Term;
+    servers: number;
+    features: string[];
+}
+
+/* Self-hosted sells annual only. The reason is in shared/license: an offline
+ * licence cannot be revoked, so the term length IS the revocation window. */
+function termsFor(deployment: Deployment): Term[] {
+    return deployment === "self_hosted" ? ["annual"] : ["monthly", "annual"];
+}
+
+/*
+ * PlanConfigurator is the whole of "what is this instance allowed", driven
+ * entirely by the plans and catalogue it is handed.
+ *
+ * A feature appears because a catalogue row offers it, and shows a price because
+ * that row has one. Nothing here is hardcoded per tier, which is what lets a new
+ * paid add-on ship as a staff edit rather than a frontend release.
+ *
+ * It saves nothing and knows nothing about who is using it. Staff mount it to
+ * set an entitlement; the customer purchase flow mounts the same component and
+ * hands it a checkout.
+ */
+export default function PlanConfigurator({
+    deployment,
+    value,
+    plans,
+    catalogue,
+    onChange,
+    disabled,
+}: {
+    deployment: Deployment;
+    value: PlanChoice;
+    plans: Plan[];
+    catalogue: CatalogueRow[];
+    onChange: (next: PlanChoice) => void;
+    disabled?: boolean;
+}) {
+    const available = useMemo(
+        () => plans.filter((p) => p.deployment === deployment && p.active),
+        [plans, deployment],
+    );
+    const plan = available.find((p) => p.tier === value.tier);
+    const rows = useMemo(
+        () => catalogue.filter((r) => r.deployment === deployment && r.tier === value.tier),
+        [catalogue, deployment, value.tier],
+    );
+    const featureRows = rows.filter((r) => r.kind === "feature");
+    const base = plan?.base_limits.max_servers ?? 0;
+    const extra = Math.max(0, value.servers - base);
+
+    const priceOf = (r: CatalogueRow) =>
+        r.price_ids?.sandbox?.[value.term] ?? r.price_ids?.production?.[value.term] ?? "";
+
+    return (
+        <div className="space-y-4">
+            <fieldset className="space-y-1.5">
+                <legend className="text-[0.78rem] text-ink-3">Tier</legend>
+                <div className="flex flex-wrap gap-2">
+                    {available.map((p) => (
+                        <button
+                            key={p.tier}
+                            type="button"
+                            disabled={disabled}
+                            onClick={() =>
+                                onChange({
+                                    ...value,
+                                    tier: p.tier,
+                                    /* Moving tier moves the floor, so clamp up
+                                     * rather than leaving an invalid count the
+                                     * backend would refuse. */
+                                    servers: Math.max(value.servers, p.base_limits.max_servers),
+                                })
+                            }
+                            className={`rounded border px-3 py-1.5 text-[0.85rem] ${
+                                p.tier === value.tier
+                                    ? "border-accent text-accent"
+                                    : "border-rule text-ink-2"
+                            }`}
+                        >
+                            {p.name}
+                        </button>
+                    ))}
+                </div>
+            </fieldset>
+
+            <fieldset className="space-y-1.5">
+                <legend className="text-[0.78rem] text-ink-3">Term</legend>
+                <div className="flex flex-wrap gap-2">
+                    {termsFor(deployment).map((t) => (
+                        <button
+                            key={t}
+                            type="button"
+                            disabled={disabled}
+                            onClick={() => onChange({ ...value, term: t })}
+                            className={`rounded border px-3 py-1.5 text-[0.85rem] ${
+                                t === value.term
+                                    ? "border-accent text-accent"
+                                    : "border-rule text-ink-2"
+                            }`}
+                        >
+                            {t === "monthly" ? "Monthly" : "Annual"}
+                        </button>
+                    ))}
+                </div>
+                {deployment === "self_hosted" && (
+                    <p className="text-[0.72rem] text-ink-3">
+                        Self-hosted is annual only.
+                    </p>
+                )}
+            </fieldset>
+
+            <label className="block">
+                <span className="mb-1 block text-[0.78rem] text-ink-3">Servers</span>
+                <input
+                    type="number"
+                    min={base}
+                    value={value.servers}
+                    disabled={disabled}
+                    onChange={(e) =>
+                        onChange({ ...value, servers: Number(e.target.value) })
+                    }
+                    className="w-28 rounded border border-rule bg-panel px-2 py-1.5 text-[0.85rem] text-ink"
+                />
+                <span className="ml-2 text-[0.78rem] text-ink-3">
+                    {base} included{extra > 0 ? `, ${extra} extra` : ""}
+                </span>
+            </label>
+
+            {featureRows.length > 0 && (
+                <fieldset className="space-y-1.5">
+                    <legend className="text-[0.78rem] text-ink-3">Features</legend>
+                    {featureRows.map((r) => {
+                        const key = r.feature_key!;
+                        const on = value.features.includes(key);
+                        const priced = priceOf(r) !== "";
+                        return (
+                            <label
+                                key={key}
+                                className="flex items-center gap-2 text-[0.85rem] text-ink-2"
+                            >
+                                <input
+                                    type="checkbox"
+                                    checked={on}
+                                    disabled={disabled}
+                                    onChange={(e) =>
+                                        onChange({
+                                            ...value,
+                                            features: e.target.checked
+                                                ? [...value.features, key]
+                                                : value.features.filter((f) => f !== key),
+                                        })
+                                    }
+                                />
+                                <span>{featureLabel(key)}</span>
+                                <span className="text-[0.72rem] text-ink-3">
+                                    {priced ? "paid add-on" : "included"}
+                                </span>
+                            </label>
+                        );
+                    })}
+                </fieldset>
+            )}
+        </div>
+    );
+}