- Tag: less rounded corners (4px), add border, more padding, hover state
- TagGroup: input above tags layout, standalone bordered input field
- ScrollArea: add role="scrollbar" with proper ARIA attributes
- CheckboxGroup: remove invalid aria-orientation on role="group"
- Field: use errorText token for AAA contrast compliance

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>