refactor: Remove debug print statements and temporary textbox from file upload handling in the Gradio application, streamlining the output structure and enhancing clarity in error messaging.

app.py

@@ -239,9 +239,7 @@ async def chat_send_stream(user_msg, history, file_url):
     messages.append({"role": "assistant", "content": "🤔 Thinking..."})
 
     # If no file, respond with error
-    print(f"DEBUG: chat_send_stream - file_url: {file_url}")
     if not file_url:
-        print("DEBUG: No file URL found, showing error")
         messages[-1] = {"role": "assistant", "content": "Upload a file first."}
         yield messages
         return
@@ -311,8 +309,6 @@ with gr.Blocks(title="MCP + GPT-5 mini - Streaming Chat") as demo:
 
     # Internal file URL storage (hidden from UI)
     file_url_state = gr.State(value=None)
-    # Temporary textbox for debugging
-    debug_file_url = gr.Textbox(label="Debug File URL", interactive=False)
 
     # Use message format for better streaming support
     chatbot = gr.Chatbot(
@@ -330,7 +326,7 @@ with gr.Blocks(title="MCP + GPT-5 mini - Streaming Chat") as demo:
     uploader.change(
         handle_upload,
         inputs=[uploader],
-        outputs=[file_url_state, debug_file_url],
+        outputs=[file_url_state],
     )
 
     # Send button (streaming) - update chatbot and clear input