Discord report (netti93). The download flow runs `enhance_file_metadata`
(clears all tags) then `generate_lrc_file` (writes .lrc sidecar AND
embeds USLT). The retag flow only ran the first half — `enhance_file_metadata`
cleared USLT and there was no follow-up to restore it.
Two coordinated fixes (no new setting per kettui scope discipline —
user described it as "might even be an idea," consistency was the
load-bearing ask).
Fix 1 — retag calls generate_lrc_file after enhance
`core/library/retag.py:execute_retag` now invokes
`deps.generate_lrc_file` right after the `enhance_file_metadata`
call, mirroring the download pipeline. New `generate_lrc_file`
field on `RetagDeps`, defaults to None for backward compat with
any test caller that builds RetagDeps without it. Web_server's
`_build_retag_deps()` factory wires in the real
`core.metadata.lyrics.generate_lrc_file`.
Placement matters — runs BEFORE `safe_move_file` so the helper
sees the audio file at its current path with its existing sidecar
(which retag hasn't moved yet). After the embed, the audio file
gets moved with USLT now present; the sidecar move step that
follows is unaffected.
Fix 2 — create_lrc_file re-embeds from existing sidecar
`core/lyrics_client.py:create_lrc_file` used to early-return True
when an .lrc / .txt sidecar already existed (skipping the LRClib
fetch). For the retag case the sidecar is already there, so the
shortcut hit and USLT was never re-written. Now the helper reads
the existing sidecar and calls `_embed_lyrics` with its content
before returning. Empty / unreadable sidecars short-circuit
silently — defensive, no crash. Download flow unaffected because
no sidecar exists at fetch time.
7 boundary tests pin: existing .lrc triggers re-embed, existing
.txt triggers re-embed, empty sidecar skips embed, unreadable
sidecar swallows error, no sidecar falls through to LRClib (download
path regression guard), RetagDeps.generate_lrc_file field accepted,
field optional for backward compat.
Full suite: 3120 passed.
2f284efa57