ssbg04
0725f4ecf9
feat(flutter): FCM real-time push notifications
- firebase_core + firebase_messaging added to pubspec.yaml
- google-services gradle plugin wired in settings.gradle.kts + app/build.gradle.kts
- fcm_service.dart: initialize FCM, handle foreground messages, register token with backend
- main.dart: Firebase.initializeApp (graceful no-op until google-services.json added)
- auth_provider.dart: FcmService.registerToken() on login and auto-login
- AndroidManifest.xml: FCM default notification channel metadata