fix bug in prompt preview display

app.py

@@ -167,7 +167,7 @@ def chat_response(user_msg, chat_history, system_prompt,
 
         pipe = load_pipeline(model_name)
         prompt = format_conversation(history, enriched, pipe.tokenizer)
-        debug += f"\n\n--- Prompt Preview ---\n```\n{prompt}\n```"
+        prompt_debug = f"\n\n--- Prompt Preview ---\n```\n{prompt}\n```"
         streamer = TextIteratorStreamer(pipe.tokenizer,
                                         skip_prompt=True,
                                         skip_special_tokens=True)
@@ -193,11 +193,12 @@ def chat_response(user_msg, chat_history, system_prompt,
             assistant_text += chunk
             history[-1]['content'] = assistant_text
             # Show debug only once
-            yield history, debug
+            yield history, debug # ← Show search results during streaming
         gen_thread.join()
+        yield history, debug + prompt_debug
     except Exception as e:
         history[-1]['content'] = f"Error: {e}"
-        yield history, debug
+        yield history, debug + prompt_debug
     finally:
         gc.collect()