Feature: Multi-tenant + Billing + Analytics - 3 new modules with 40+ API endpoints

frontend/src/App.tsx

@@ -42,6 +42,9 @@ import PrivacySettings from '@/pages/admin/PrivacySettings';
 import ImBots from '@/pages/admin/ImBots';
 import Promotion from '@/pages/admin/Promotion';
 import Achievement from '@/pages/admin/Achievement';
+import Tenant from '@/pages/admin/Tenant';
+import Billing from '@/pages/admin/Billing';
+import Analytics from '@/pages/admin/Analytics';
 
 const App: React.FC = () => {
   const [user, setUser] = useState<User | null>(null);
@@ -127,6 +130,9 @@ const App: React.FC = () => {
           <Route path="privacy" element={<PrivacySettings />} />
           <Route path="promotion" element={<Promotion />} />
           <Route path="achievement" element={<Achievement />} />
+          <Route path="tenant" element={<Tenant />} />
+          <Route path="billing" element={<Billing />} />
+          <Route path="analytics" element={<Analytics />} />
         </Route>
 
         <Route path="*" element={<Navigate to="/" />} />