Add serial parameter to Search method to enable enhanced search logic for
series content. When serial flag is set, perform additional search using
English title to find more results. Improve voice selection by properly
handling display names with fallbacks to key or default label.
Implement comprehensive multi-season handling for AnimeON and Mikai
controllers to properly display and navigate anime series with multiple
seasons.
For AnimeON:
- Fix season numbering to use actual season numbers instead of array indices
- Group seasons by SeasonNumber property with fallback to index-based numbering
- Update season selection links to use correct season identifiers
For Mikai:
- Add relation fetching to discover sequels, prequels, and related anime
- Implement season detail collection and ordering by release date
- Refactor voice building to support multiple seasons per voice actor
- Update season selection UI to display all available seasons
- Add MikaiRelation and MikaiRelationAnime models for API data handling
