feat(web-player): page the album results and save YouTube albums

The albums section keeps a Ver más button while YouTube Music has another
page, fed by a new /api/youtube/albums route that forwards the continuation
token. The YouTube album page gains a save button that drops the whole album,
tracks included, into your library and takes you to it.

web-player/src/routes/(app)/explore/+page.server.ts

@@ -55,6 +55,7 @@ export const load: PageServerLoad = async ({ url, locals, fetch }) => {
 		tracks,
 		albums: albumsRes?.data?.items ?? [],
 		youtubeAlbums: youtubeAlbumsRes?.data?.items ?? [],
+		youtubeAlbumsContinuation: youtubeAlbumsRes?.data?.continuationToken ?? '',
 		ytResults: searchRes?.data ?? null,
 		ytError: Boolean(searchRes?.error),
 		youtubeFiller: query