feat(db): add M6a library-list + artist-tracks queries

Appends ListArtistsAlphaWithCovers, ListAlbumsAlphaWithArtist,
CountAlbums, and ListArtistTracksForUser queries; regenerates sqlc.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

internal/db/queries/albums.sql

@@ -67,3 +67,16 @@ FROM albums
 JOIN artists ON artists.id = albums.artist_id
 ORDER BY albums.created_at DESC, albums.id
 LIMIT $1;
+
+-- name: ListAlbumsAlphaWithArtist :many
+-- M6a: alpha-sorted album list joined with artist_name. Used by
+-- /api/library/albums for the wrapping-grid page. Stable id-tiebreak.
+SELECT sqlc.embed(albums), artists.name AS artist_name
+FROM albums
+JOIN artists ON artists.id = albums.artist_id
+ORDER BY albums.sort_title, albums.id
+LIMIT $1 OFFSET $2;
+
+-- name: CountAlbums :one
+-- M6a: total album count for the /api/library/albums envelope.
+SELECT COUNT(*) FROM albums;

internal/db/queries/artists.sql

@@ -42,3 +42,25 @@ SELECT COUNT(*) FROM artists WHERE name ILIKE '%' || $1::text || '%';
 -- Batched lookup used by M5c suggestion attribution to resolve top-3
 -- contributing seed UUIDs back to artist names in one round-trip.
 SELECT * FROM artists WHERE id = ANY($1::uuid[]);
+
+-- name: ListArtistsAlphaWithCovers :many
+-- M6a: alpha-sorted artist list with derived cover_album_id (most-recent
+-- album whose cover_art_path is set). Replaces ListArtistsAlpha for the
+-- /api/artists?sort=alpha branch — the new column is appended, so the
+-- alpha branch is purely additive on the wire. album_count is computed
+-- in the same query to drop the old N+1 in handleListArtists.
+SELECT sqlc.embed(artists),
+       cov.id AS cover_album_id,
+       cnt.album_count::bigint AS album_count
+FROM artists
+LEFT JOIN LATERAL (
+    SELECT id FROM albums
+    WHERE artist_id = artists.id AND cover_art_path IS NOT NULL
+    ORDER BY created_at DESC LIMIT 1
+) cov ON true
+LEFT JOIN LATERAL (
+    SELECT count(*) AS album_count
+    FROM albums WHERE artist_id = artists.id
+) cnt ON true
+ORDER BY artists.sort_name, artists.name, artists.id
+LIMIT $1 OFFSET $2;

internal/db/queries/tracks.sql

@@ -70,3 +70,23 @@ WHERE title ILIKE '%' || $1::text || '%'
     SELECT 1 FROM lidarr_quarantine q
     WHERE q.user_id = $2 AND q.track_id = tracks.id
   );
+
+-- name: ListArtistTracksForUser :many
+-- M6a: every track for the artist across their albums, with album_title
+-- and artist_name joined. Honors per-user lidarr_quarantine. Used by
+-- /api/artists/{id}/tracks for the artist-card play affordance, which
+-- shuffles client-side. Ordering matches album/track natural order so
+-- the shuffle has a deterministic input.
+SELECT sqlc.embed(t),
+       albums.title AS album_title,
+       artists.name AS artist_name
+FROM tracks t
+JOIN albums  ON albums.id  = t.album_id
+JOIN artists ON artists.id = t.artist_id
+WHERE t.artist_id = $1
+  AND NOT EXISTS (
+      SELECT 1 FROM lidarr_quarantine q
+      WHERE q.user_id = $2 AND q.track_id = t.id
+  )
+ORDER BY albums.release_date NULLS LAST, albums.sort_title,
+         t.disc_number NULLS FIRST, t.track_number NULLS FIRST, t.id;