## What
The **User Guide** item in the Resources dropdown rendered its preview
image off-center (anchored top-left with a gap below the halftone).
## Fix
Set `imagePosition: 'center'` on the User Guide preview so the halftone
book is centered and fills to the bottom of the frame, matching the
others.
## Testing
- `nx lint twenty-website` ✓ (check-conventions + oxlint + oxfmt)
- `nx typecheck twenty-website` ✓
Abdullah.
63d092a31b