OpenRouter报错（抱歉，服务出现了一点问题。请稍后重试）临时解决方案

<img width="1920" height="919" alt="Image" src="https://github.com/user-attachments/assets/0a3e0bdd-5c98-460b-ba18-0111e698ae69" />
在app.py里面找到llm_event_stream函数，把model改成 google/gemini-2.5-pro

<img width="595" height="237" alt="Image" src="https://github.com/user-attachments/assets/ab4eb932-8ddf-477e-b353-f887e66fe685" />