feat(10-02): extend /api/me with isAdmin + needsProviderSetup (D-03)

- dev-bypass path: DB lookup for users.isAdmin (T-10-05 bypass skips OIDC not DB)
- OIDC path: same resolveAdminAndSetupStatus helper after upsertUser
- needsProviderSetup: true when no member_credentials row, false when one exists
- no /api/me/credential POST added here (Plan 03)

apps/api/src/routes/me.ts

@@ -1,5 +1,5 @@
 /**
- * GET /api/me — returns the authenticated user's identity and assigned color.
+ * GET /api/me — returns the authenticated user's identity, admin role, and provider setup status.
  *
  * Flow (normal — OIDC active):
  *   1. getAuth(c) reads iss + sub from the OIDC session JWT cookie
@@ -7,36 +7,72 @@
  *   2. Derives displayName from OIDC claims (name → preferred_username → email → sub fallback)
  *      then calls upsertUser(iss, sub, displayName) — writes on first visit, corrects a
  *      previously blank displayName on subsequent visits (idempotent, keyed on iss+sub, D-10)
- *   3. Returns { user: { id, displayName, color } }
+ *   3. Queries users.isAdmin and member_credentials existence for the resolved user
+ *   4. Returns { user: { id, displayName, color, isAdmin, needsProviderSetup } }
  *
  * Flow (dev bypass — DEV_AUTH_BYPASS=true, non-production):
  *   devAuthBypass() injects DEV_USER via c.set('user', DEV_USER). oidcAuthMiddleware
  *   is NOT mounted in index.ts when the bypass is active, so getAuth(c) is never called.
- *   This handler reads c.get('user') first and short-circuits to return the dev identity
+ *   This handler reads c.get('user') first and short-circuits using the dev user's id,
- *   directly, skipping the DB upsert.
+ *   but STILL queries the DB for isAdmin (T-10-05: bypass skips OIDC, not the DB check)
+ *   and member_credentials existence.
+ *
+ * Security (D-03, T-10-06):
+ *   isAdmin is exposed for UX-only PWA nav gating — it is NOT the security boundary.
+ *   The server enforces the role on every /api/admin/* request via requireAdmin (Plan 03).
  *
  * The OIDC session cookie is httpOnly + Secure + SameSite (T-02-03).
- * No credential or refresh-token data is included in the response (T-02-04).
+ * No credential or refresh-token data is included in the response (T-02-04, T-10-07).
  */
 
 import { Hono } from 'hono';
+import { eq } from 'drizzle-orm';
 import { getAuth } from '../auth/middleware.js';
 import { upsertUser, deriveDisplayName } from '../auth/user.js';
+import { db } from '../db/client.js';
+import { users, memberCredentials } from '../db/schema.js';
 // Side-effect import: brings in the ContextVariableMap augmentation for c.get('user')
 import '../auth/devBypass.js';
 
 export const meRouter = new Hono();
 
+/**
+ * Looks up isAdmin and needsProviderSetup for a given userId.
+ * Always reads from the DB — bypass only skips OIDC, not this check (T-10-05).
+ */
+async function resolveAdminAndSetupStatus(userId: number) {
+  const [userRow] = await db
+    .select({ isAdmin: users.isAdmin })
+    .from(users)
+    .where(eq(users.id, userId))
+    .limit(1);
+
+  const [cred] = await db
+    .select({ id: memberCredentials.id })
+    .from(memberCredentials)
+    .where(eq(memberCredentials.userId, userId))
+    .limit(1);
+
+  return {
+    isAdmin: userRow?.isAdmin ?? false,
+    needsProviderSetup: !cred,
+  };
+}
+
 meRouter.get('/', async (c) => {
   // Dev-auth bypass path: devAuthBypass() sets c.get('user') to DEV_USER when active.
-  // Return the injected dev identity directly — no DB round-trip, no OIDC session needed.
+  // Use the injected dev identity's id for DB lookups — no OIDC session needed,
+  // but isAdmin and needsProviderSetup are still resolved from the DB (T-10-05).
   const devUser = c.get('user');
   if (devUser) {
+    const { isAdmin, needsProviderSetup } = await resolveAdminAndSetupStatus(devUser.id);
     return c.json({
       user: {
         id: devUser.id,
         displayName: devUser.displayName,
         color: devUser.color,
+        isAdmin,
+        needsProviderSetup,
       },
     });
   }
@@ -64,11 +100,15 @@ meRouter.get('/', async (c) => {
     return c.json({ error: 'Could not resolve user' }, 500);
   }
 
+  const { isAdmin, needsProviderSetup } = await resolveAdminAndSetupStatus(user.id);
+
   return c.json({
     user: {
       id: user.id,
       displayName: user.displayName,
       color: user.color,
+      isAdmin,
+      needsProviderSetup,
     },
   });
 });