feat: Enable Firebase Cloud Messaging for iOS with platform-specific configurations and update Android build settings.

lib/main.dart

@@ -10,12 +10,7 @@ Future<void> mainCommon(Flavor flavor) async {
   WidgetsFlutterBinding.ensureInitialized();
   await AppConfig.init(flavor);
 
-  // Initialize Firebase — iOS may fail if no iOS app configured in Firebase Console
-  try {
-    await Firebase.initializeApp(options: FirebaseConfig.currentOptions);
-  } catch (e) {
-    debugPrint('[Firebase] Init failed (expected on iOS without config): $e'); // ignore: avoid_print
-  }
+  await Firebase.initializeApp(options: FirebaseConfig.currentOptions);
 
   runApp(const ProviderScope(child: MyApp()));
 }