slight update

backend/database.py

@@ -29,35 +29,12 @@ def init_db():
     subscribers_collection.create_index('subscribed_at')
     # Create unique index on RSS feed URLs
     rss_feeds_collection.create_index('url', unique=True)
+    # Create index on category for filtering
+    rss_feeds_collection.create_index('category')
     
     # Initialize tracking collections indexes
     init_tracking_collections()
     
-    # Initialize default RSS feeds if collection is empty
-    if rss_feeds_collection.count_documents({}) == 0:
-        default_feeds = [
-            {
-                'name': 'Süddeutsche Zeitung München',
-                'url': 'https://www.sueddeutsche.de/muenchen/rss',
-                'active': True,
-                'created_at': datetime.utcnow()
-            },
-            {
-                'name': 'Münchner Merkur',
-                'url': 'https://www.merkur.de/muenchen/rss',
-                'active': True,
-                'created_at': datetime.utcnow()
-            },
-            {
-                'name': 'Abendzeitung München',
-                'url': 'https://www.abendzeitung-muenchen.de/rss',
-                'active': True,
-                'created_at': datetime.utcnow()
-            }
-        ]
-        rss_feeds_collection.insert_many(default_feeds)
-        print(f"Initialized {len(default_feeds)} default RSS feeds")
-    
     print("Database initialized with indexes")