'wire_api = "chat" is no longer supported

**不支持mimo的chat到responses的协议转换**
<img width="1294" height="286" alt="Image" src="https://github.com/user-attachments/assets/252e3fba-3e64-4f83-835e-d25e66c20af7" />

<img width="1384" height="506" alt="Image" src="https://github.com/user-attachments/assets/fb91da85-fa64-458f-aab2-c9403c4d4c56" />