Billing upgrade/downgrade, inviti in app e diretta YouTube da mobile.

Upgrade Stripe con addebito immediato; downgrade programmato a fine periodo.
UX billing più sobria con box info; icone piani. API inviti e OAuth YouTube
per staff trasmissione; deep link join; scelta partita programmata o nuova.

Co-authored-by: Cursor <cursoragent@cursor.com>

mobile/lib/main.dart

@@ -5,6 +5,7 @@ import 'package:intl/date_symbol_data_local.dart';
 
 import 'app/router.dart';
 import 'app/theme.dart';
+import 'core/deep_link_listener.dart';
 
 Future<void> main() async {
   WidgetsFlutterBinding.ensureInitialized();
@@ -28,11 +29,13 @@ class MatchLiveTvApp extends ConsumerWidget {
   Widget build(BuildContext context, WidgetRef ref) {
     final router = ref.watch(routerProvider);
 
-    return MaterialApp.router(
-      title: 'Match Live TV',
-      debugShowCheckedModeBanner: false,
-      theme: AppTheme.dark,
-      routerConfig: router,
+    return DeepLinkListener(
+      child: MaterialApp.router(
+        title: 'Match Live TV',
+        debugShowCheckedModeBanner: false,
+        theme: AppTheme.dark,
+        routerConfig: router,
+      ),
     );
   }
 }