fix: add navigation links and account screen

- Fix empty onPressed handlers in login/home screens
- Add todo/calendar toggle navigation in bottom dock
- Fix message invite detail path (/messages/invites/:id)
- Add account screen with logout/switch account dialogs
- Add /settings/account route

apps/lib/core/router/app_router.dart

@@ -18,6 +18,7 @@ import '../../features/todo/ui/screens/todo_detail_screen.dart';
 import '../../features/settings/ui/screens/settings_screen.dart';
 import '../../features/settings/ui/screens/features_screen.dart';
 import '../../features/settings/ui/screens/memory_screen.dart';
+import '../../features/settings/ui/screens/account_screen.dart';
 
 final appRouter = GoRouter(
   initialLocation: '/',
@@ -88,5 +89,9 @@ final appRouter = GoRouter(
       path: '/settings/memory',
       builder: (context, state) => const MemoryScreen(),
     ),
+    GoRoute(
+      path: '/settings/account',
+      builder: (context, state) => const AccountScreen(),
+    ),
   ],
 );