merge: integrate WP6-01 dependency for TASK-WP6-04

# Conflicts:
#	apps/web/src/admin-models.tsx
#	apps/web/src/admin-users.tsx
#	apps/web/src/main.tsx
#	package.json
#	scripts/lib/openapi.mjs

apps/api/src/app.ts

@@ -10,6 +10,7 @@ import {
   AccountProfileUpdateResponseSchema,
   AccountSettingsResponseSchema,
   AdminAuthenticatedUserSchema,
+  AdminOverviewResponseSchema,
   AdminCreditParamsSchema,
   AdminLoginCompleteRequestSchema,
   AdminLoginCompleteResponseSchema,
@@ -110,6 +111,7 @@ import {
   type BootstrapResponse,
   type AdminLoginCompleteRequest,
   type AdminLoginSendRequest,
+  type AdminOverviewResponse,
   type AccountDeletionCompleteRequest,
   type AccountProfileUpdateRequest,
   type AdminCreditParams,
@@ -196,6 +198,7 @@ const defaultBootstrap: BootstrapResponse = {
 };
 
 export interface CreateAppOptions {
+  adminOverview?: () => AdminOverviewResponse | Promise<AdminOverviewResponse>;
   amap?: AmapAdapter;
   assetReleases?: AssetReleaseReader;
   bootstrap?: () => BootstrapResponse | Promise<BootstrapResponse>;
@@ -713,6 +716,7 @@ export async function createApp(options: CreateAppOptions = {}) {
     AdminLoginCompleteRequestSchema,
     AdminLoginCompleteResponseSchema,
     AdminSessionResponseSchema,
+    AdminOverviewResponseSchema,
     CreditSummarySchema,
     CreditEntryTypeSchema,
     CreditEntryStatusSchema,
@@ -1453,6 +1457,35 @@ export async function createApp(options: CreateAppOptions = {}) {
     },
   );
 
+  app.get(
+    "/api/v1/admin/overview",
+    {
+      schema: {
+        operationId: "getAdminOverview",
+        response: {
+          200: Type.Ref(AdminOverviewResponseSchema),
+          401: Type.Ref(ErrorEnvelopeSchema),
+          503: Type.Null(),
+        },
+        tags: ["Admin Operations"],
+      },
+    },
+    async (request, reply) => {
+      if (!options.registration) return reply.code(503).send(null);
+      const token = cookieValue(headerValue(request.headers.cookie), adminSessionCookieName);
+      const session = token ? options.registration.readAdminSession(token) : undefined;
+      if (!session) {
+        return reply.code(401).send(createErrorEnvelope({ code: "AUTH_SESSION_INVALID", correlationId: request.id }));
+      }
+      if (!options.adminOverview) return reply.code(503).send(null);
+      try {
+        return await options.adminOverview();
+      } catch {
+        return reply.code(503).send(null);
+      }
+    },
+  );
+
   app.post(
     "/api/v1/auth/login/send",
     {