feat(tag-manager): overhaul with 5 ordered categories, hierarchy, editing, and ManicTime seed import
- Reduce TagCategory to 5 ordered types: project, phase, activity, document-type, custom
- Add tag hierarchy (parent-child), projectCode field, updatedAt timestamp
- Add getChildren, updateTag, cascading deleteTag, searchTags, importTags to TagService
- ManicTime seed data parser (~95 Beletage projects, phases, activities, document types)
- Full UI rewrite: seed import dialog, inline editing, collapsible category sections
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Marius Tarau
f555258dcb