The showpiece: a focused 'which release does this track belong to?' chooser.
Source tabs (default active), pre-seeded search, the same song surfaced across
single/EP/album with color-coded type badges, ISRC-ranked, replace-original
toggle (on by default). Glassy panel, blurred hero art, shimmer/spinner states,
hover-lift result cards — matched to the app's modal language.
Backend:
- core/imports/rematch_apply.py: pure staged_destination + build_reidentify_hint,
injectable stage_file_for_reidentify (COPIES the file, never moves — original
safe until re-import succeeds). 6 tests.
- POST /api/reidentify/apply (admin-only): resolve_hint_fields → stage file →
create_hint → nudge the worker. Replace deletes the old row only on success.
Frontend: modal markup (index.html), full stylesheet (style.css), and the
openReidentifyModal/search/select/confirm flow (library.js). Not yet reachable
from a button — Phase 5 wires it.
