- Add null-conditional on CsvReader.Context.Parser to fix CS8602 warnings - Guard ConflictCombo_SelectionChanged against null ViewModel during XAML init Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- CsvValidationService: CsvHelper-based parsing with DetectDelimiter, BOM detection, per-row validation for BulkMemberRow/BulkSiteRow/FolderStructureRow - TemplateRepository: atomic JSON write (tmp + File.Move) with SemaphoreSlim, supports GetAll/GetById/Save/Delete/Rename operations - CsvValidationServiceTests: 9 passing tests (email validation, delimiter detection, BOM handling, folder/site/member validation) - TemplateRepositoryTests: 6 passing tests (round-trip, GetAll, delete, rename, empty directory, non-existent id) - All previously-skipped scaffold tests now active and passing (15 total)
