keep debug message

app.py

@@ -179,15 +179,13 @@ def chat_response(user_msg, chat_history, system_prompt,
         gen_thread.start()
 
         assistant_text = ''
-        first = True
         for chunk in streamer:
             if cancel_event.is_set():
                 break
             assistant_text += chunk
             history[-1]['content'] = assistant_text
             # Show debug only once
-            yield history, (debug if first else '')
-            first = False
+            yield history, debug
         gen_thread.join()
     except Exception as e:
         history[-1]['content'] = f"Error: {e}"