qwen_image 报错 msg: 'list' object has no attribute 'startswith'

### Custom Node Testing

- [ ] I have tried disabling custom nodes and the issue persists (see [how to disable custom nodes](https://docs.comfy.org/troubleshooting/custom-node-issues#step-1%3A-test-with-all-custom-nodes-disabled) if you need help)

### Expected Behavior

添加修复
`
if isinstance(text, list):
text = text[0]
`

### Actual Behavior

报错:
msg: 'list' object has no attribute 'startswith'

定位文件：
/user/ComfyUI/comfy/text_encoders/qwen_image.py

代码位置：
line:22

代码： text.startswith('<|im_start|>') 传入的text为list 导致

### Steps to Reproduce

定位文件：
/user/ComfyUI/comfy/text_encoders/qwen_image.py

代码位置：
line:22

### Debug Logs

```powershell
msg: 'list' object has no attribute 'startswith'
```

### Other

_No response_