### What?
The "Preview Sizes" button in the file upload UI was not showing up if:
- `crop` and `focalPoint` were both `false`
- No `customUploadActions` were provided
- But image sizes were configured
### Why?
This happened because `UploadActions` wasn’t rendered at all unless
adjustments or custom actions were present.
### How?
Update the conditional in `StaticFileDetails` to also render
`UploadActions` when:
- `hasImageSizes` is `true` and the document has a `filename`
Fixes#12832