Implement a comprehensive favorites system for anime tracking with the following features:
- Add/remove anime from favorites with unique anime_id
- Toggle favorite status (add if not exists, remove if exists)
- List favorites with sorting (title, rating, year, created_at, updated_at)
- Filter favorites by provider and genre
- Get detailed statistics (total count, provider breakdown, genre distribution, top-rated)
- Persistent storage using JSON file (favorites.json)
- Full REST API with 6 endpoints
API Endpoints:
- GET /api/favorites - List all favorites with sorting/filtering
- POST /api/favorites - Add anime to favorites
- DELETE /api/favorites/{anime_id} - Remove from favorites
- GET /api/favorites/{anime_id} - Get specific favorite details
- GET /api/favorites/stats - Get favorites statistics
- POST /api/favorites/toggle - Toggle favorite status
Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)
Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>
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