- Refactor preview popover into reusable component with filter input and load more
- Fix sort controls: connect sort-field-select to btn-sort-dir (shared border)
- Fix refine controls: connect btn-refine-negate to refine-input
- Add flex-shrink: 0 and min-width to prevent button shrinking
- Fix grid view items: border on all 4 sides, no padding
- Add EXCEPT separator styling for selection groups
- Various button width and height fixes for consistency
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>