Update app.py

app.py

@@ -64,19 +64,26 @@ def update_url_list(_):
 
 @callback(
     Output('content-iframe', 'src'),
-    Input({'type': 'url-button', 'index': dash.ALL}, 'n_clicks')
+    Input({'type': 'url-button', 'index': dash.ALL}, 'n_clicks'),
+    prevent_initial_call=True
 )
-def update_iframe(n_clicks):
+def update_iframe(*n_clicks):
     ctx = dash.callback_context
     if not ctx.triggered:
+        print("No button clicked")
         return dash.no_update
+    
     button_id = ctx.triggered[0]['prop_id'].split('.')[0]
     clicked_id = eval(button_id)['index']
+    print(f"Button clicked: {clicked_id}")
+    
     links = load_links()
     for link in links:
         if link['id'] == clicked_id:
-            print(f"Loading URL: {link['url']}")  # Debug print
+            print(f"Loading URL: {link['url']}")
             return link['url']
+    
+    print("No matching URL found")
     return dash.no_update
 
 if __name__ == '__main__':