when run script agent/s_full.py , agent reply is empty!

when run s_full.py script, agent reply is empty:
<img width="566" height="60" alt="Image" src="https://github.com/user-attachments/assets/cbbc2fd1-9ffe-48e5-bbb0-fb599da34047" />

fix bug: add print history message to fix
<img width="642" height="212" alt="Image" src="https://github.com/user-attachments/assets/e5a9eafd-dcdc-4f46-9655-985a88503866" />

 