连接微信后，每次发消息都会创建一个用户

### Pre-checks

- [x] I have searched [existing issues](https://github.com/dataelement/Clawith/issues) and this is not a duplicate.

### Deployment Method

Docker

### Steps to Reproduce

<img width="1504" height="581" alt="Image" src="https://github.com/user-attachments/assets/5abca5e6-7255-4ba9-8a15-ab4cb4ce749d" />

### Expected vs Actual Behavior

不创建用户

### Logs / Screenshots

_No response_