[BUG] 框选文本一直抱错误信息

## Bug Description
错误信息如下:
[ClaudeCode] [server] [ERROR] WebSocket server error: Client read error: ECONNRESET

## To Reproduce
打开插件侧边栏后，框选几次文本就会一直弹窗，是大概率偶现

## Expected Behavior

## Environment

- Neovim version: NVIM v0.12.5
- Claude Code CLI version: 2.1.241
- OS: arhlinux
- Plugin version: lastest

## Error Messages

If applicable, add error messages or logs.

```
Paste any error messages here
```

## Additional Context