feat: add admin survey invites page with create and list

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/router.tsx

@@ -10,6 +10,7 @@ import {
 
 // Public pages
 const SharedSessionPage = lazy(() => import('@/pages/SharedSessionPage'))
+const SurveyPage = lazy(() => import('@/pages/SurveyPage'))
 
 // Standalone auth pages
 const VerifyEmailPage = lazy(() => import('@/pages/VerifyEmailPage'))
@@ -50,6 +51,7 @@ const AdminPlanLimitsPage = lazy(() => import('@/pages/admin/PlanLimitsPage'))
 const AdminFeatureFlagsPage = lazy(() => import('@/pages/admin/FeatureFlagsPage'))
 const AdminSettingsPage = lazy(() => import('@/pages/admin/SettingsPage'))
 const AdminGlobalCategoriesPage = lazy(() => import('@/pages/admin/GlobalCategoriesPage'))
+const AdminSurveyInvitesPage = lazy(() => import('@/pages/admin/SurveyInvitesPage'))
 
 // Account pages
 const AccountLayout = lazy(() => import('@/components/account/AccountLayout'))
@@ -96,6 +98,15 @@ export const router = createBrowserRouter([
     ),
     errorElement: <RouteError />,
   },
+  {
+    path: '/survey',
+    element: (
+      <Suspense fallback={<PageLoader />}>
+        <SurveyPage />
+      </Suspense>
+    ),
+    errorElement: <RouteError />,
+  },
   {
     path: '/share/:shareToken',
     element: (
@@ -384,6 +395,14 @@ export const router = createBrowserRouter([
               </Suspense>
             ),
           },
+          {
+            path: 'survey-invites',
+            element: (
+              <Suspense fallback={<PageLoader />}>
+                <AdminSurveyInvitesPage />
+              </Suspense>
+            ),
+          },
         ],
       },
       // Account routes