feat: Word the workload and update panels for Windows servers

web/app/(app)/servers/[id]/page.tsx

@@ -301,7 +301,9 @@ export default function ServerDetailPage() {
             <div ref={panelsRef} className="p-4 sm:p-6 lg:p-8">
                 <div role="tabpanel" id={`server-panel-${activeTab}`} aria-labelledby={`server-tab-${activeTab}`}>
                     {activeTab === "overview" && <OverviewTab server={server} attention={attention} onGoTo={selectTab} />}
-                    {activeTab === "workloads" && <WorkloadList serverId={server.server_id} canControl={isAdmin} />}
+                    {activeTab === "workloads" && (
+                        <WorkloadList serverId={server.server_id} canControl={isAdmin} isWindows={!!server.os_info?.toLowerCase().includes("windows")} />
+                    )}
                     {activeTab === "security" && <ServerVulnerabilities serverId={server.server_id} />}
                     {activeTab === "access" && <AccessTab server={server} onGenerateKey={() => setShowGenerateModal(true)} />}
                     {activeTab === "maintenance" && (

web/components/servers/tabs/MaintenanceTab.tsx

@@ -47,11 +47,18 @@ export function MaintenanceTab({
             <Card padding={false}>
                 <div className="flex flex-wrap items-center justify-between gap-3 border-b border-border px-6 py-4">
                     <h2 className="text-lg font-semibold text-text-primary">OS updates</h2>
-                    {updates.length > 0 ? <Badge variant="warning">{updates.length} pending</Badge> : <Badge variant="success">up to date</Badge>}
+                    <div className="flex flex-wrap items-center gap-2">
+                        {updates.length > 0 ? <Badge variant="warning">{updates.length} pending</Badge> : <Badge variant="success">up to date</Badge>}
+                        {/* Sits with the updates panel because that is what
+                            caused it. The agent never reboots a host itself. */}
+                        {server.inventory?.reboot_required && <Badge variant="warning">reboot required</Badge>}
+                    </div>
                 </div>
 
                 {updates.length === 0 ? (
-                    <p className="px-6 py-10 text-center text-sm text-text-secondary">No pending package updates. The agent checks hourly.</p>
+                    <p className="px-6 py-10 text-center text-sm text-text-secondary">
+                        {isWindows ? "No pending Windows updates. The agent checks hourly." : "No pending package updates. The agent checks hourly."}
+                    </p>
                 ) : (
                     <>
                         {/* Capped so a host with 400 pending packages does not make the
@@ -60,9 +67,9 @@ export function MaintenanceTab({
                             <Table>
                                 <Thead>
                                     <Tr>
-                                        <Th>Package</Th>
+                                        <Th>{isWindows ? "Update" : "Package"}</Th>
                                         <Th>Current</Th>
-                                        <Th>Available</Th>
+                                        <Th>{isWindows ? "KB" : "Available"}</Th>
                                     </Tr>
                                 </Thead>
                                 <Tbody>

web/components/workloads/WorkloadList.tsx

@@ -45,7 +45,7 @@ const ACTION_PAST: Record<WorkloadAction, string> = {
     restart: "Restarted",
 };
 
-export function WorkloadList({ serverId, canControl }: { serverId: string; canControl: boolean }) {
+export function WorkloadList({ serverId, canControl, isWindows }: { serverId: string; canControl: boolean; isWindows: boolean }) {
     const qc = useQueryClient();
     const toast = useToast();
     const [logTarget, setLogTarget] = useState<Workload | null>(null);
@@ -115,7 +115,7 @@ export function WorkloadList({ serverId, canControl }: { serverId: string; canCo
                 {snapshot.isLoading ? (
                     <p className="text-sm text-text-secondary">Loading…</p>
                 ) : !data ? (
-                    <p className="text-sm text-text-secondary">Nothing reported yet. Agents report every 60 seconds, on Linux only.</p>
+                    <p className="text-sm text-text-secondary">Nothing reported yet. Agents report every 60 seconds.</p>
                 ) : (
                     <div className="space-y-2 text-sm">
                         {/* Docker absent is the common case on a fleet built
@@ -128,9 +128,18 @@ export function WorkloadList({ serverId, canControl }: { serverId: string; canCo
                             <p className="text-text-secondary">Docker is not in use on this server.</p>
                         ) : null}
 
+                        {/* One wire field, two honest words for it: the agent
+                            reports Windows services under the same `unit` kind
+                            systemd units use, and only the UI knows which host
+                            this is. On Windows there is no "not in use" case —
+                            every Windows host has a service controller — so a
+                            failure is the only thing worth saying. */}
                         {data.systemd_error ? (
-                            <p className="text-warning">systemd could not be read: {data.systemd_error}</p>
-                        ) : !data.systemd_ok ? (
+                            <p className="text-warning">
+                                {isWindows ? "Windows services could not be read: " : "systemd could not be read: "}
+                                {data.systemd_error}
+                            </p>
+                        ) : !data.systemd_ok && !isWindows ? (
                             <p className="text-text-secondary">systemd is not in use on this server.</p>
                         ) : null}
                     </div>

web/lib/api.ts

@@ -14,6 +14,7 @@ export interface Inventory {
     swap_used_bytes: number;
     partitions?: { device: string; mountpoint: string; fstype?: string; total_bytes: number; used_bytes: number }[];
     kernel?: string;
+    reboot_required?: boolean;
     metrics_at?: string;
     static_at?: string;
 }