Move push notification to client instead of db trigger

lib/providers/notifications_provider.dart

@@ -59,15 +59,22 @@ class NotificationsController {
     );
     await _client.from('notifications').insert(rows);
 
-    // push notifications are now handled by a database trigger that
-    // calls the `send_fcm` edge function.  We keep the client-side
-    // `sendPush` method around for manual/integration use, but avoid
-    // invoking it here to prevent CORS issues on web.
+    // If target user IDs are provided, invoke client-side push
+    // flow by calling `sendPush`. We no longer rely on the DB trigger
+    // to call the edge function.
     if (targetUserIds == null || targetUserIds.isEmpty) return;
 
-    debugPrint(
-      'notification rows inserted; server trigger will perform pushes',
-    );
+    debugPrint('notification rows inserted; invoking client push');
+    try {
+      await sendPush(
+        userIds: targetUserIds,
+        title: pushTitle ?? '',
+        body: pushBody ?? '',
+        data: pushData,
+      );
+    } catch (e) {
+      debugPrint('sendPush failed: $e');
+    }
   }
 
   /// Create a typed notification in the database.  This method handles
@@ -167,6 +174,10 @@ class NotificationsController {
     final userId = _client.auth.currentUser?.id;
     if (userId == null) return;
     final deviceId = await DeviceId.getId();
+    if (deviceId.isEmpty) {
+      debugPrint('registerFcmToken: device id missing; skipping');
+      return;
+    }
     // upsert using a unique constraint on (user_id, device_id) so a single
     // device keeps its token updated without overwriting other devices.
     final payload = {
@@ -176,13 +187,6 @@ class NotificationsController {
       'created_at': DateTime.now().toUtc().toIso8601String(),
     };
     final res = await _client.from('fcm_tokens').upsert(payload);
-    if (res == null) {
-      debugPrint(
-        'registerFcmToken: null response for user=$userId token=$token',
-      );
-      return;
-    }
-
     final dyn = res as dynamic;
     if (dyn.error != null) {
       // duplicate key or RLS issue - just log it
@@ -204,12 +208,6 @@ class NotificationsController {
         .eq('user_id', userId)
         .eq('device_id', deviceId)
         .or('token.eq.$token');
-    if (res == null) {
-      debugPrint(
-        'unregisterFcmToken: null response for user=$userId token=$token',
-      );
-      return;
-    }
     final uDyn = res as dynamic;
     if (uDyn.error != null) {
       debugPrint(
@@ -227,11 +225,11 @@ class NotificationsController {
     Map<String, dynamic>? data,
   }) async {
     try {
-      if (tokens != null) {
+      if (tokens != null && tokens.isNotEmpty) {
         debugPrint(
           'invoking send_fcm with ${tokens.length} tokens, title="$title"',
         );
-      } else if (userIds != null) {
+      } else if (userIds != null && userIds.isNotEmpty) {
         debugPrint(
           'invoking send_fcm with userIds=${userIds.length}, title="$title"',
         );
@@ -239,6 +237,7 @@ class NotificationsController {
         debugPrint('sendPush called with neither tokens nor userIds');
         return;
       }
+
       final bodyPayload = <String, dynamic>{
         'tokens': tokens ?? [],
         'user_ids': userIds ?? [],
@@ -246,6 +245,7 @@ class NotificationsController {
         'body': body,
         'data': data ?? {},
       };
+
       await _client.functions.invoke('send_fcm', body: bodyPayload);
     } catch (err) {
       debugPrint('sendPush invocation error: $err');