Update app.py

app.py

@@ -57,7 +57,8 @@ def chat_handler(message, history):
 # UI wiring for the Chat tab
 with gr.Blocks() as app:
 
-    with gr.Tab("Chat"):
+   with gr.Tab("Chat"):  # line 60
+    # everything inside the tab must be indented
     chatbot = gr.Chatbot(label="Programming Assistant", type="messages")
     chat_input = gr.Textbox(label="Ask anything...", placeholder="Type a question here...")
     send_btn = gr.Button("Send")
@@ -80,6 +81,7 @@ with gr.Blocks() as app:
 
 
 
+
     # Callback for chat
     def chat_handler(message, history):
         history = history or []