swap out chat functionality

app.py

@@ -16,11 +16,11 @@ def chat(message, history):
     history.append((message, response))
     return history, history
 
-chatbot = gr.Chatbot(color_map=("green", "gray"))
-demo = gr.Interface(
+iface = gr.Interface(
     chat,
     ["text", "state"],
-    [chatbot, "state"],
+    ["chatbot", "state"],
+    allow_screenshot=False,
     allow_flagging="never",
 )
-demo.launch()
+iface.launch()