feat(subsonic): getAlbumList2 recent and frequent read the caller's play history (#6293)

type=recent orders the caller's albums by their latest play (skips
included); type=frequent orders them by completed plays (skips
excluded). Plays of tracks whose file is gone do not count, and both
page by size/offset like the other types.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/subsonic/browse.go

@@ -236,8 +236,9 @@ func (b *browseHandlers) getSong(w http.ResponseWriter, r *http.Request) {
 }
 
 // getAlbumList2 returns a paged album list filtered by type. Supported types
-// match the Subsonic spec § getAlbumList2. "recent" and "frequent" return an
-// empty list rather than an error, so clients that poll them don't break.
+// match the Subsonic spec § getAlbumList2. "recent" and "frequent" read the
+// caller's own play history: most recently played first, and most played
+// first.
 func (b *browseHandlers) getAlbumList2(w http.ResponseWriter, r *http.Request) {
 	params := r.URL.Query()
 	listType := params.Get("type")
@@ -291,8 +292,20 @@ func (b *browseHandlers) getAlbumList2(w http.ResponseWriter, r *http.Request) {
 			Genre: genre, Lim: int32(size), Off: int32(offset),
 		})
 	case "recent", "frequent":
-		// Not served from play history: empty keeps clients working.
-		albums = nil
+		user, ok := UserFromContext(r.Context())
+		if !ok {
+			WriteFail(w, r, ErrNotAuthorized, "Not authenticated")
+			return
+		}
+		if listType == "recent" {
+			albums, err = q.ListAlbumsRecentlyPlayedByUser(r.Context(), dbq.ListAlbumsRecentlyPlayedByUserParams{
+				UserID: user.ID, Lim: int32(size), Off: int32(offset),
+			})
+		} else {
+			albums, err = q.ListAlbumsFrequentlyPlayedByUser(r.Context(), dbq.ListAlbumsFrequentlyPlayedByUserParams{
+				UserID: user.ID, Lim: int32(size), Off: int32(offset),
+			})
+		}
 	default:
 		WriteFail(w, r, ErrGeneric, "Invalid list type: "+listType)
 		return