Update app.py

app.py

@@ -100,6 +100,11 @@ def main():
         submit_btn.click(add_text_to_chat_history, [chat_history, user_txt], [chat_history, user_txt]).then(show_history, [chat_history], [chatbot])\
                   .then(kadi_bot.handle_chat, [chat_history], [chatbot])        
         clear_btn.click(clear_history, inputs = [chat_history], outputs =chat_history)
+        clear_button.click(
+            lambda _: 0,
+            [chat_history],
+            [chat_history],
+        )
     demo.launch()