Update app.py

app.py

@@ -846,6 +846,17 @@ def cleanup_old_messages(days: int = 30) -> str:
     except Exception as e:
         return f"❌ Failed to clean old messages: {str(e)}"
 
+def get_topics_list() -> List[str]:
+    """Retrieve a list of unique topics from the database."""
+    try:
+        with sqlite3.connect(DATABASE_FILE) as conn:
+            cursor = conn.execute('SELECT DISTINCT topic FROM messages ORDER BY topic')
+            topics = [row[0] for row in cursor.fetchall()]
+            return ["All Topics"] + topics
+    except sqlite3.Error as e:
+        print(f"❌ Error retrieving topics: {str(e)}")
+        return ["All Topics"]
+
 
 # Define custom CSS for the Gradio interface
 custom_css = """