Update app.py

app.py

@@ -77,12 +77,16 @@ with gr.Blocks() as demo:
             modify_system = gr.Button("🛠️ Set system prompt and clear history", scale=2)
         system_state = gr.Textbox(value=default_system, visible=False)
     chatbot = gr.Chatbot(label='qwen2-72B-instruct')
-    textbox = gr.Textbox(lines=2, label='Input')
+    textbox = gr.Textbox(lines=1, label='Input')
 
     with gr.Row():
         clear_history = gr.Button("🧹 Clear history")
         sumbit = gr.Button("🚀 Send")
 
+    textbox.submit(model_chat,
+                 inputs=[textbox, chatbot, system_state],
+                 outputs=[textbox, chatbot, system_input])
+    
     sumbit.click(model_chat,
                  inputs=[textbox, chatbot, system_state],
                  outputs=[textbox, chatbot, system_input],