ai: Call session close function once.

app.py

@@ -100,7 +100,6 @@ def respond(user_input, history, selected_model_display):
     ai_response = ""
     for chunk in chat_with_model(history, user_input, selected_model_display):
         if stop_event.is_set():
-            session.close()
             history[-1][1] = RESPONSES["RESPONSE_1"]
             yield history, gr.update(value=""), gr.update(visible=True), gr.update(visible=False)
             return
@@ -108,7 +107,6 @@ def respond(user_input, history, selected_model_display):
         history[-1][1] = ai_response
         yield history, gr.update(value=""), gr.update(visible=False), gr.update(visible=True)
 
-    session.close()
     yield history, gr.update(value=""), gr.update(visible=True), gr.update(visible=False)
 
 def stop_response():