resolve issues with new features

backend/src/services/bookstack.service.ts

@@ -189,7 +189,7 @@ async function getPageById(id: number): Promise<BookStackPageDetail> {
       html: page.html ?? '',
       created_at: page.created_at,
       updated_at: page.updated_at,
-      url: `${bookstack.url}/books/${page.book_slug || page.book_id}/page/${page.slug}`,
+      url: `${bookstack.url}/books/${page.book?.slug || page.book_slug || page.book_id}/page/${page.slug}`,
       book: page.book,
       createdBy: page.created_by,
       updatedBy: page.updated_by,

backend/src/services/notification.service.ts

@@ -113,6 +113,33 @@ class NotificationService {
     }
   }
 
+  /** Marks all unread notifications of a given quell_typ as read for a user. */
+  async dismissByType(userId: string, quellTyp: string): Promise<void> {
+    try {
+      await pool.query(
+        `UPDATE notifications SET gelesen = TRUE, gelesen_am = NOW()
+         WHERE user_id = $1 AND quell_typ = $2 AND gelesen = FALSE`,
+        [userId, quellTyp]
+      );
+    } catch (error) {
+      logger.error('NotificationService.dismissByType failed', { error, userId, quellTyp });
+      throw new Error('Notifications konnten nicht als gelesen markiert werden');
+    }
+  }
+
+  /** Deletes all read notifications for a user. */
+  async deleteAllRead(userId: string): Promise<void> {
+    try {
+      await pool.query(
+        `DELETE FROM notifications WHERE user_id = $1 AND gelesen = TRUE`,
+        [userId]
+      );
+    } catch (error) {
+      logger.error('NotificationService.deleteAllRead failed', { error, userId });
+      throw new Error('Gelesene Notifications konnten nicht gelöscht werden');
+    }
+  }
+
   /** Deletes read notifications older than 90 days for all users. */
   async deleteOldRead(): Promise<void> {
     try {