Three problems wrapped into one pass on the Playlist Auto-Sync surface:
1. Visual: the manager modal had its own vibe (radial gradient, pill
tabs, sky-blue chrome) that didn't line up with the rest of the
app. Reworked the modal shell, KPI summary, live pipeline monitor,
tab bar, schedule board sidebar, and column cards to use the
standard SoulSync patterns — gradient `#1a1a1a → #121212`,
accent-tinted 1px border, 20px radius, underline tabs, dense dark
card pattern that Automations + Library pages already use. Modal
now uses near-full screen so there's room for the schedule board
without horizontal scroll pain. Run history cards followed the
same path: slim horizontal row mirroring `.automation-card` plus
an expanded detail that mirrors the Automations run-history modal
(stats-grid + facts row + result pills + log section).
2. Hang: the previous SQL fix for the run-history "in library" count
added `COLLATE NOCASE` on the join columns of `tracks` and
`artists`. SQLite can't use `idx_artists_name` or `idx_tracks_title`
when the comparison collation doesn't match the column collation,
so the join did a full table scan per mirrored playlist track.
~18s per playlist × 30 playlists = `/api/mirrored-playlists` hung
indefinitely and the modal stayed at "Loading schedule…" forever.
Switched the join back to case-sensitive equality (~6ms per
playlist, 3000× faster). Spotify names canonicalize to the same
form as library imports so the recall loss is in the rounding
error of pure case-only mismatches.
3. Slowness: even after the hang fix, each modal open spent ~1.5s
gathering per-playlist status counts. The endpoint looped
`get_mirrored_playlist_status_counts(playlist_id)` per row, which
opened a fresh SQLite connection + PRAGMA setup each time. Added
`get_all_mirrored_playlist_status_counts(profile_id)` which
returns counts for every mirrored playlist owned by the active
profile in 4 batched `GROUP BY` queries over a single connection.
Modal load dropped to ~280ms.
Also fixed: `tracks.artist` reference in `get_mirrored_playlist_status_counts`
that never worked since the schema went relational — the query threw
"no such column", got swallowed by the try/except, and the in-library
count silently defaulted to 0 on every playlist. Rewired to join
through `artists`.
`get_mirrored_playlist_status_counts` (single-playlist) kept for
callers that still want it, but the modal endpoint uses the batched
version.
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