- New src/artwork/ module with iPod Nano 7G cover art support
- codecs: RGB565/RGB555/UYVY/JPEG encode/decode via numpy
- presets: 50+ iPod artwork format definitions
- chunks: ArtworkDB binary parser/writer (MHFD→MHSD→MHLI→MHII→MHNI)
- writer: ithmb file generation + ArtworkDB assembly
- extractor: cover extraction from audio files (APIC/covr/FLAC pictures)
- cache: local JPEG cache for player UI
- iTunes-style playback bar with 60x60 cover art display
- Scan library now caches cover art by artist+album
- iPod Nano7 transfer writes artwork to ArtworkDB + ithmb
- FFmpeg conversion preserves embedded cover art (-map 0:t?)
- One-time reembed_covers.py script in /tmp
- MetadataHandler process_file() fallback to cover_path
- Bug fixes: missing read_existing_artwork import, signed PID in Q format
- Replace QListWidget with QTableWidget in Library tab
- 6 columns: #, Artist, Title, Duration, Genre, Size
- Track numbers displayed without leading zeros (1, 2, 3...)
- Dash shown when track number is unknown
- Sort by track number within album by default
- Clickable column headers for sorting by any field
- Alternating row colors for readability
- Row selection (SelectRows behavior)
- Artist and Title columns stretch to fill space
- Add genre field to TrackInfo dataclass
- Include genre in metadata extract_tags() return value
- Extract genre and track_number during library scan
- Add extract_tags() to metadata_handler.py: reads tags from FLAC, MP3, OGG, M4A
- Support ID3v2 (MP3), Vorbis comments (FLAC/OGG), MP4 tags (M4A)
- Extract cover art from METADATA_BLOCK_PICTURE (FLAC), APIC (MP3), covr (M4A)
- Update _run_convert to use extract_tags instead of guessing from filename
- Fix tag reading in ipod_nano7_db.get_audio_info() using EasyID3 for MP3
