The re-add showed no album/single art. Cause: reconstruct returned the full track
from tracks_json AS-IS — and some syncs store tracks_json lean (no album.images),
so the re-added wishlist entry had an empty album.images even though the track's
cover was sitting right there in the track_result's image_url.
Fix: always backfill album.images from the track_result's image_url when the album
has none (and copy the dict so tracks_json isn't mutated). Real album art is kept
when present; the 250px thumb only fills a gap. Verified against a real sync row in
all three cases (full / lean tracks_json / no tracks_json) — album.images now
populated in every one. The wishlist card reads album.images, so the cover shows.
5cad2c02b0