- new "Audit" button on each download row in the library history
modal opens a second modal visualizing the download lifecycle as
an interactive horizontal stepper (request → source → match →
verify → process → place) with click-to-expand detail cards
- hero header with album art + track title + meta line + status
pills (source / quality / acoustid result)
- three tabs: Lifecycle / Tags / Lyrics
- Tags tab reads the audio file live via mutagen at audit-open
time via new GET /api/library/history/<id>/file-tags endpoint;
file is the single source of truth so background enrichment
writes (audiodb / lastfm / genius / replaygain / lyrics fetch)
show up too. flat key/value rows stacked vertically (label-above-
value) so long MBIDs / URLs / joined genre lists wrap cleanly.
source IDs grouped per-service into 2-col sub-card grid.
- Lyrics tab renders the full transcript with dimmed timecodes.
- post-processing step infers observable changes from source-vs-
final state (format conversion, file rename via tag template,
folder template).
- "Download History" button also added to the Downloads page batch
panel header so it's reachable outside the dashboard.
- mobile responsive: tabs + stepper scroll horizontally, modal
goes full-screen, hero stacks below 480px.
19 helper tests pin the mutagen reader: id3 (TIT2/TPE1/TALB + TXXX
+ USLT + APIC), vorbis (FLAC dict + _id/_url passthrough), file
metadata (format / bitrate / duration), defensive paths (empty /
missing file / mutagen returns None / mutagen raises), stringify
edge cases (list / tuple / int / frame-with-text / whitespace).
6ce185491d