Remove unnecessary complexity from the calendar web app:
- Remove tag groups system entirely (store, API client, route, components)
Tags are now a flat alphabetically-sorted list instead of grouped hierarchy
- Remove unused legacy composables (useDragDrop, useResize) that were never
imported by any component — useEventDragDrop already consolidates both
- Simplify TagStripModal from 1,452 to ~350 LOC by removing group CRUD,
drag-drop between groups, and group hierarchy rendering
- Add complexity audit report documenting remaining issues
Total: -2,170 LOC across 13 files
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
