Boulder: the live display was a cramped ~600px box showing a fraction of the
data the scan already tracks, with no animation and no history.
Live scan deck (replaces the three-column box, full width):
- Header: pulsing live dot, "x / y artists" progress text, and two live
counter chips (found / added) that pop when they change.
- Animated progress bar (artist index / total) with a shimmer sweep.
- Stage: artist avatar with accent glow + name + readable phase line
("Checking album 2 of 5"), album art + album + current track.
- "Added to wishlist this run" feed: taller, bigger art, slide-in animation
that plays once per new track (feed re-renders only when it changes).
- All data was already in scan_state (current_artist_index, total_artists,
tracks_found/added_this_scan, current_phase) — just never displayed. The
legacy fullscreen-modal markup shares element ids and lacks the new ones,
so it keeps working untouched.
Scan History (persistent):
- New watchlist_scan_runs table — one row per run (status, timestamps,
artists/found/added counts) + the full track ledger JSON. Saved at scan
completion AND cancellation; idempotent on run_id; pruned to the last 100
runs. Wishlist rows erode as tracks download, so this is the durable record.
- GET /api/watchlist/scan/history (runs) + /history/<run_id>/tracks (ledger).
- New History button on the Watchlist page → modal in the origins/blocklist
house style: run cards (date, cancelled chip, artists/found/added stats)
expanding into the Added / Skipped track lists with art and badges.
Tests: save+fetch with ledger, idempotent re-save, prune keeps newest,
unknown-run empty, cancelled runs recorded. 398 watchlist/wishlist/history
tests pass; JS syntax-checked; all rendered strings escaped.
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