Fix warnings and update tracability

src/routes/library/music/albums/+page.svelte

@@ -10,7 +10,7 @@
    */
 
   const config = {
-    itemType: "MusicAlbum",
+    itemType: "MusicAlbum" as const,
     title: "Albums",
     backPath: "/library/music",
     searchPlaceholder: "Search albums or artists...",

src/routes/library/music/artists/+page.svelte

@@ -10,7 +10,7 @@
    */
 
   const config = {
-    itemType: "MusicArtist",
+    itemType: "MusicArtist" as const,
     title: "Artists",
     backPath: "/library/music",
     searchPlaceholder: "Search artists...",

src/routes/library/music/genres/+page.svelte

@@ -9,7 +9,7 @@
    */
 
   const config = {
-    itemTypes: ["MusicAlbum"],
+    itemTypes: ["MusicAlbum" as const],
     title: "Genres",
     backPath: "/library/music",
     genreIcon:

src/routes/library/music/playlists/+page.svelte

@@ -9,7 +9,7 @@
    */
 
   const config = {
-    itemType: "Playlist",
+    itemType: "Playlist" as const,
     title: "Playlists",
     backPath: "/library/music",
     searchPlaceholder: "Search playlists...",

src/routes/library/music/tracks/+page.svelte

@@ -10,7 +10,7 @@
    */
 
   const config = {
-    itemType: "Audio",
+    itemType: "Audio" as const,
     title: "Tracks",
     backPath: "/library/music",
     searchPlaceholder: "Search tracks or artists...",