frontend fixes

album artist gets populated with artist as fallback (frontend also uses
this as display name fallback for albums). added scroll position
persistence when switching main views. also added frontend cache for
faster switching.

backend/database/sql/queries/release_groups.sql

@@ -43,13 +43,20 @@ SELECT * FROM release_groups
 ORDER BY name;
 
 -- name: GetAllAlbumsWithDetails :many
-SELECT 
+SELECT
     rg.id,
     rg.name,
     rg.year,
-    COALESCE(ac.text, '') as artist_name,
+    COALESCE(ac.text, fallback_ac.text, '') as artist_name,
     COALESCE(ca.file_path, '') as cover_art_path
 FROM release_groups rg
 LEFT JOIN artist_credit ac ON rg.album_artist_credit_id = ac.id
 LEFT JOIN cover_art ca ON rg.cover_art_id = ca.id
+LEFT JOIN (
+    SELECT rgr.release_group_id, ac2.text
+    FROM release_group_recordings rgr
+    JOIN recordings rec ON rec.id = rgr.recording_id
+    JOIN artist_credit ac2 ON ac2.id = rec.artist_credit_id
+    GROUP BY rgr.release_group_id
+) fallback_ac ON fallback_ac.release_group_id = rg.id
 ORDER BY rg.name;