fix(mobile): stabilize router and add loading timeout/retry on playlists screen

lib/core/router/app_router.dart

@@ -13,12 +13,11 @@ import '../widgets/themed_loading_screen.dart';
 import '../../features/iptv/providers/xtream_provider.dart';
 
 final routerProvider = Provider<GoRouter>((ref) {
-  final authState = ref.watch(authProvider);
-
   return GoRouter(
     initialLocation: '/login',
     refreshListenable: RouterRefreshNotifier(ref),
     redirect: (context, state) {
+      final authState = ref.read(authProvider);
       final isLoggedIn = authState.isAuthenticated;
       final isLoginRoute = state.matchedLocation == '/login';
 
@@ -97,12 +96,15 @@ final routerProvider = Provider<GoRouter>((ref) {
   );
 });
 
-/// Notifier that triggers router refresh when auth state changes
+/// Notifier that triggers router refresh when auth state or selected playlist changes
 class RouterRefreshNotifier extends ChangeNotifier {
   RouterRefreshNotifier(this._ref) {
     _ref.listen(authProvider, (_, __) {
       notifyListeners();
     });
+    _ref.listen(selectedPlaylistProvider, (_, __) {
+      notifyListeners();
+    });
   }
 
   final Ref _ref;

lib/mobile/features/iptv/screens/mobile_playlist_selection_screen.dart

@@ -40,7 +40,27 @@ class MobilePlaylistSelectionScreen extends ConsumerWidget {
           ],
         ),
         body: playlistsAsync.when(
-          loading: () => const Center(child: CircularProgressIndicator()),
+          loading: () => Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const CircularProgressIndicator(),
+                const SizedBox(height: 24),
+                FutureBuilder(
+                  future: Future.delayed(const Duration(seconds: 5)),
+                  builder: (context, snapshot) {
+                    if (snapshot.connectionState == ConnectionState.done) {
+                      return TextButton(
+                        onPressed: () => ref.refresh(playlistsProvider),
+                        child: const Text('Still loading? Tap to retry'),
+                      );
+                    }
+                    return const SizedBox.shrink();
+                  },
+                ),
+              ],
+            ),
+          ),
           error: (error, stack) => Center(
             child: Column(
               mainAxisAlignment: MainAxisAlignment.center,