Dev 4ba4de6106 feat(13-02): add directory browse mode with paginated load, member/guest filter, and sortable ICollectionView ...

- Inject IGraphUserDirectoryService into UserAccessAuditViewModel (both constructors)
- Add IsBrowseMode toggle, DirectoryUsers collection, DirectoryUsersView with sort/filter
- Add LoadDirectoryCommand with progress reporting, cancellation, and error handling
- Add IncludeGuests toggle for in-memory member/guest filtering (no new Graph request)
- Add DirectoryFilterText for DisplayName/UPN/Department/JobTitle text search
- Add DirectoryUserCount computed property reflecting filtered view count
- Update OnTenantSwitched to clear all directory state
- Add 16 comprehensive unit tests covering all directory browse behaviors

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

2026-04-08 16:07:53 +02:00

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