Single tracks (esp. Deezer-sourced) imported as "01 - Title" regardless
of their real album position — e.g. Fly Away (track 2 of Greatest Hits)
landed as 01, littering album folders with duplicate "01" files.
Root cause: a Deezer single track is matched via /search/track, which
omits track_position, so the context never carried the real number; then
service.py + context.py fabricated a confident track_number=1 from that
gap. Because the resolver puts that first, the fake 1 beat the source.
It is source-agnostic (slskd-with-Deezer-metadata hits it too) — albums
work because /album/<id>/tracks DOES include positions.
Fix (at the shared import funnel, strictly additive):
- track_number.py: new read_embedded_track_number() (mutagen, local, no
network) + an optional embedded_track_number arg on resolve_track_number.
The downloaded file already carries the source-written position (deemix
wrote it); consult it LAST — only when metadata AND the "NN - Title"
filename both come up empty — so it can only fill the gap that would
otherwise hit the default-1 floor. Never overrides a value the pre-fix
resolver produced (no regression for correctly-named/mistagged files).
- pipeline.py: read the file tag at the resolve step and pass it in.
- De-poison: service.py:217 + context.py default to 0 (the existing
"unknown" sentinel, like total_tracks), NOT 1 — so the fake 1 no longer
blocks recovery. Frontend already treats falsy track_number as unknown
(omits it), so this also drops the bogus "1." in the UI.
13 new resolver tests incl. the no-regression precedence guards; full
imports + wishlist suites green (583), no behavior change for albums.
d15b3a185d