Fix of the notification subscription

Web/push_notifications.py

@@ -308,8 +308,8 @@ def _send_fcm_notification(subscription, payload):
 
 def _send_web_push_notification(subscription, payload):
     try:
-        from pywebpush import webpush
-        
+        from pywebpush import webpush, WebPushException
+
         webpush(
             subscription_info={
                 'endpoint': subscription['Endpoint'],
@@ -319,18 +319,25 @@ def _send_web_push_notification(subscription, payload):
             vapid_private_key=VAPID_PRIVATE_KEY,
             vapid_claims={'sub': VAPID_SUBJECT},
             timeout=10,
-            ttl=3600 
+            ttl=3600
         )
-        
         return True
-        
+
     except ImportError:
         logger.warning('pywebpush not installed. pip install pywebpush')
         return False
-    except Exception as e:
-        logger.error(f'Web push error: {e}')
-        return False
+    # HÄRTUNG: Spezifische WebPush-Fehler abfangen
+    except WebPushException as ex:
+        # HTTP 404 (Not Found) oder 410 (Gone) bedeuten: Abo existiert nicht mehr
+        if ex.response is not None and ex.response.status_code in [404, 410]:
+            logger.info(f"Subscription expired or revoked (Code {ex.response.status_code}). Marking inactive.")
+            return False  # False signalisiert der übergeordneten Funktion, das Abo zu deaktivieren
 
+        logger.error(f'Web push failed with code {ex.response.status_code if ex.response else "Unknown"}: {ex}')
+        return False
+    except Exception as e:
+        logger.error(f'Unexpected Web push error: {e}')
+        return False
 
 def _mark_subscription_inactive(subscription_id):
     try: