Update app.py

app.py

@@ -154,7 +154,29 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
                 user_input = gr.Textbox(label="User Input", placeholder="Type your question here...", lines=3, scale=8)
                 with gr.Column():
                     submit_button = gr.Button("Send", variant="primary", scale=1)
+                    stop_button   = gr.Button("⏹ Stop", variant="secondary", scale=1)
                     clear_button = gr.Button("Clear", scale=1)
+            
+            # 1️⃣  keep the event object in a variable
+            submit_event = submit_button.click(
+                    fn     = send_message,
+                    inputs = [user_input, max_tokens_slider, temperature_slider,
+                              top_p_slider, current_convo_id, history_state],
+                    outputs= [chatbot,      history_state,   conversation_selector]
+            ).then(
+                    fn     = lambda: gr.update(value=""),   # clear the textbox
+                    inputs = None,
+                    outputs= user_input
+            )
+            
+            # 2️⃣  the stop button only needs to cancel that event
+            stop_button.click(
+                    fn      = None,         # nothing has to run
+                    inputs  = None,
+                    outputs = None,
+                    cancels = [submit_event]    # <-- this does the interrupt
+            )
+                
             gr.Markdown("**Try these examples:**")
             with gr.Row():
                 example1_button = gr.Button("JEE Main 2025\nCombinatorics")
@@ -225,4 +247,4 @@ with gr.Blocks(theme=gr.themes.Soft()) as demo:
 
 if __name__ == "__main__":
     # first positional argument = concurrency_count
-    demo.queue(8).launch(share=True, ssr_mode=False)
+    demo.queue(6).launch(share=True, ssr_mode=False)