update UI

app.py

@@ -705,7 +705,7 @@ def retry(history):
         print("chathmi3 error:", e)      
     # yield chathmi3(last_request, chatbot_history)
 
-with gr.Blocks(css=".gradio-container {background-color: black}") as demo:
+with gr.Blocks() as demo:
     # gr.Markdown("Start typing below and then click **SUBMIT** to see the output.")
     # main = gr.ChatInterface(
     #     fake,