feat: finalize notification system (android manifest, token revocation, backend logs)

go-backend/internal/services/push_service.go

@@ -43,6 +43,8 @@ func NewPushService(userRepo *repository.UserRepository, credentialsFile string)
 		return nil, fmt.Errorf("error getting Messaging client: %v", err)
 	}
 
+	log.Info().Msg("[INFO] PushService initialized successfully")
+
 	return &PushService{
 		client:   client,
 		userRepo: userRepo,

sojorn_app/android/app/src/main/AndroidManifest.xml

@@ -1,4 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.gosojorn.app">
     <!-- Location permissions for Beacon Network -->
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

sojorn_app/lib/services/notification_service.dart

@@ -88,9 +88,22 @@ class NotificationService {
   Future<void> removeToken() async {
     if (_currentToken == null) return;
     
-    // Migrate this to Go API
+    try {
+      debugPrint('[FCM] Revoking token...');
+      await ApiService.instance.callGoApi(
+        '/notifications/device',
+        method: 'DELETE',
+        body: {
+          'fcm_token': _currentToken,
+        },
+      );
+      debugPrint('[FCM] Token revoked successfully');
+    } catch (e) {
+      debugPrint('[FCM] Failed to revoke token: $e');
+    } finally {
       _currentToken = null;
     }
+  }
 
   Future<void> _upsertToken(String token) async {
     try {