after restart, the output assets can not load automaticly

### 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

The assets should preview the list of output dir

### Actual Behavior

empty

### Steps to Reproduce

restart comfyui

### Debug Logs

```powershell
NAN
```

### Other

_No response_

The issue names no files, tests, or entry points. Start by reproducing the problem with `restart comfyui` and trace how output-directory assets are listed for preview. Done means the output assets populate the preview list after a restart.

Written by the indexing model from the issue text.