- Add protocols for all UseCases and implement them in their respective classes
- Add DefaultUseCaseFactory and MockUseCaseFactory for dependency injection
- Implement all mock UseCases with dummy data
- Start migration of view models and views to protocol-based UseCase injection (not all migrated yet)
- Refactor previews and some initializers for easier testing
- Move SectionHeader to Components, update server settings UI text
- Add sample article.html for mock content
- Add BookmarkLabel model and DTO
- Create LabelsRepository and PLabelsRepository protocol
- Add GetLabelsUseCase for fetching labels
- Update BookmarkMapper to handle labels
- Add LabelsView and LabelsViewModel for UI
- Update BookmarksView and BookmarkLabelsView to display labels
- Add green2 color asset for labels
- Update API and repository layers to support labels
