resolve issues with new features

backend/src/controllers/notification.controller.ts

@@ -67,6 +67,34 @@ class NotificationController {
       res.status(500).json({ success: false, message: 'Notifications konnten nicht aktualisiert werden' });
     }
   }
+  /** POST /api/notifications/dismiss-by-type — marks all unread notifications of a given type as read. */
+  async dismissByType(req: Request, res: Response): Promise<void> {
+    try {
+      const { quellTyp } = req.body;
+      if (!quellTyp || typeof quellTyp !== 'string') {
+        res.status(400).json({ success: false, message: 'quellTyp ist erforderlich' });
+        return;
+      }
+      const userId = req.user!.id;
+      await notificationService.dismissByType(userId, quellTyp);
+      res.status(200).json({ success: true, message: 'Notifications als gelesen markiert' });
+    } catch (error) {
+      logger.error('NotificationController.dismissByType error', { error });
+      res.status(500).json({ success: false, message: 'Notifications konnten nicht aktualisiert werden' });
+    }
+  }
+
+  /** DELETE /api/notifications/read — deletes all read notifications for the authenticated user. */
+  async deleteAllRead(req: Request, res: Response): Promise<void> {
+    try {
+      const userId = req.user!.id;
+      await notificationService.deleteAllRead(userId);
+      res.status(200).json({ success: true, message: 'Gelesene Notifications gelöscht' });
+    } catch (error) {
+      logger.error('NotificationController.deleteAllRead error', { error });
+      res.status(500).json({ success: false, message: 'Gelesene Notifications konnten nicht gelöscht werden' });
+    }
+  }
 }
 
 export default new NotificationController();