add handling for error and successful return

src/services/NotificationService.ts

@@ -111,9 +111,11 @@ export class NotificationService {
     });
     const json = await response.json();
 
-    // Check whether it was successful
-    // Return the result
-    return false;
+    if (response.status !== 200) {
+      console.error(`Notification failed for device ${deviceId}:`, json.reason);
+      return false;
+    }
+    return true;
   }
 
   private getAPNsFullUrlToUse(deviceId: string) {