feat: Updated plans and catalogue pages

adminsite/lib/api.ts

@@ -8,6 +8,9 @@
  * customer-facing and should be shown verbatim).
  */
 
+/* catalogue.ts imports only types from here, so this is not a cycle. */
+import { rowsForPlan } from "@/lib/catalogue";
+
 export const API_BASE = (process.env.NEXT_PUBLIC_ADMIN_API_URL ?? "").replace(/\/$/, "");
 
 export class NotConnected extends Error {
@@ -176,6 +179,11 @@ export interface Plan {
 
 export interface CatalogueRow {
     kind: "base" | "limit" | "feature";
+    /* "plan" rows carry a deployment and tier and belong to that plan alone.
+     * "shared" rows leave both empty and are sold by every paid plan, which is
+     * why a price ID is typed once rather than four times. Read them through
+     * rowsForPlan in lib/catalogue, never by filtering on deployment. */
+    scope: "plan" | "shared";
     deployment: Deployment;
     tier: Tier;
     limit_key?: string;
@@ -213,9 +221,7 @@ export function lineItemsFor(
     const env = opts.env;
     const plan = opts.plans.find((p) => p.deployment === deployment && p.tier === choice.tier);
     if (!plan) return [];
-    const rows = opts.catalogue.filter(
-        (r) => r.deployment === deployment && r.tier === choice.tier,
-    );
+    const rows = rowsForPlan(opts.catalogue, deployment, choice.tier);
     const priceOf = (r: CatalogueRow) => r.price_ids?.[env]?.[choice.term] ?? "";
     const base = plan.base_limits.max_servers;
     const items: { priceId: string; quantity: number }[] = [];