playlist phantom track matching added, updated search queries for efficiency

backend/database/sql/queries/genres.sql

@@ -22,3 +22,50 @@ DELETE FROM recording_genres;
 
 -- name: DeleteAllGenres :exec
 DELETE FROM genres;
+
+-- name: GetTracksByGenre :many
+SELECT
+    af.file_path,
+    af.length_milliseconds,
+    COALESCE(r.name, '') AS title,
+    COALESCE(ac.text, '') AS artist_name,
+    r.track_number,
+    r.disc_number,
+    COALESCE(rlg.name, '') AS album,
+    CAST(COALESCE(
+        (SELECT GROUP_CONCAT(g2.name, '||')
+         FROM recording_genres rg2
+         JOIN genres g2 ON rg2.genre_id = g2.id
+         WHERE rg2.recording_id = r.id),
+        ''
+    ) AS TEXT) AS genre,
+    COALESCE(r.year, 0) AS year,
+    COALESCE(r.composer, '') AS composer,
+    COALESCE(ft.extension, '') AS file_type,
+    af.sample_rate,
+    af.bit_depth,
+    af.channels,
+    af.bitrate,
+    af.file_size
+FROM genres g
+JOIN recording_genres rg ON g.id = rg.genre_id
+JOIN recordings r ON rg.recording_id = r.id
+JOIN audio_files af ON af.recording_id = r.id
+JOIN artist_credit ac ON r.artist_credit_id = ac.id
+LEFT JOIN (
+    SELECT recording_id,
+        MIN(release_group_id) AS release_group_id
+    FROM release_group_recordings
+    GROUP BY recording_id
+) rgr ON r.id = rgr.recording_id
+LEFT JOIN release_groups rlg ON rgr.release_group_id = rlg.id
+LEFT JOIN file_types ft ON af.file_type_id = ft.id
+WHERE g.name = ?
+ORDER BY r.name;
+
+-- name: GetAllGenresWithCounts :many
+SELECT g.name, COUNT(rg.recording_id) AS track_count
+FROM genres g
+JOIN recording_genres rg ON g.id = rg.genre_id
+GROUP BY g.id, g.name
+ORDER BY g.name;