Fix of the notification subscription

Web/static/js/push-notifications.js

@@ -162,19 +162,17 @@ class PushNotificationManager {
             const subscription = await this.serviceWorkerRegistration.pushManager.getSubscription();
             if (!subscription) {
                 console.warn('No active push subscription');
-                return false;
+                return true; // Bereits deaktiviert
             }
 
-            // Remove subscription on server
-            const success = await this.removeSubscriptionFromServer(subscription);
+            // Best-Effort: Dem Server Bescheid geben (wir ignorieren absichtlich,
+            // falls der Server das Abo nicht mehr kennt)
+            await this.removeSubscriptionFromServer(subscription);
 
-            // Unsubscribe from push service
-            if (success) {
-                await subscription.unsubscribe();
-                return true;
-            }
+            // WICHTIG: Das Abo im Browser immer zwingend löschen!
+            await subscription.unsubscribe();
+            return true;
 
-            return false;
         } catch (error) {
             console.error('Failed to unsubscribe from push notifications:', error);
             return false;