- R128: changed from JSONR128 float64 to R128 struct with i, tp, important_secs fields
(Python R128 is an object, not a number)
- StorageID -> StorageDir with json tag storage_dir (Python API uses storage_dir)
- Lyrics: replaced TrackLyricsInfo with Lyrics (from supplement/lyrics.py) and
TrackLyricsInfo (from track/lyrics_info.py with has_available_sync_lyrics,
has_available_text_lyrics fields)
- Track.Lyrics field now maps to lyrics_info JSON key with TrackLyricsInfo type
- Document all exported types, functions, methods, and constants across 52 files
- Add package-level doc comments to client, models, utils, and ynison packages
- Document HTTP method and endpoint path for each API client method
- Document model struct fields and DeJSON/DeList/ToJSON/ToMap methods
- Fix duplicate package doc comment in internal/models/base.go
Co-Authored-By: Claude Code <noreply@anthropic.com>