- 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 PATCH API endpoint for updating bookmarks with toggle functions
- Add DELETE API endpoint for permanent bookmark deletion
- Implement UpdateBookmarkUseCase with convenience methods for common actions
- Implement DeleteBookmarkUseCase for permanent bookmark removal
- Create BookmarkUpdateRequest domain model with builder pattern
- Extend BookmarkCardView with action menu and confirmation dialog
- Add context-sensitive actions based on current bookmark state
- Implement optimistic updates in BookmarksViewModel
- Add error handling and recovery for failed operations
- Enhance UI with badges, progress indicators, and action buttons
