Preserve audio and artwork while replacing conflicting Opus gain tags with R128 comments. Verify manual, download, and album writes, handle SAF failures, and refresh playback normalization after saving.
Apply resolved metadata with copyWith and retain the existing field precedence. Keep UPC, preview URLs, and source-only fields when enrichment updates other tags.
Extract the pure merge helpers and add regression tests for field preservation.
- _replaceSafFileVia: op now registers produced files via addCleanup
the moment they exist, so converted temp files are deleted even
when a later step throws (old code's outer-variable finally)
- native worker history: recompute format from the final file path
at history-write time and gate bitrate on lossy output again -
the extracted helper was recording pre-conversion format/bitrate
(FLAC conversions logged as m4a with nulled bit depth on SAF)
- drop dead ignore_for_file header in the finalization part
Pure move: paths, native worker, finalization, ReplayGain, and
metadata embedding move to part files as private extensions on
DownloadQueueNotifier; queue orchestration, state, and public API
stay in the main file (7598 -> 4022 lines).
zarzet