feat(genius): fetch artist avatars by name and match names with transliteration suffix

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

services/api/internal/genius/metadata.go

@@ -16,11 +16,23 @@ func normalize(s string) string {
 	return strings.Join(strings.FieldsFunc(strings.ToLower(s), func(r rune) bool { return !unicode.IsLetter(r) && !unicode.IsNumber(r) }), " ")
 }
 
+// sameArtist сравнивает имя на Genius с нашим: у Genius часто «имя (транслитерация)»,
+// поэтому скобочный хвост допустим.
+func sameArtist(geniusName, name string) bool {
+	if normalize(geniusName) == normalize(name) {
+		return true
+	}
+	if i := strings.Index(geniusName, "("); i > 0 && strings.HasSuffix(strings.TrimSpace(geniusName), ")") {
+		return normalize(geniusName[:i]) == normalize(name)
+	}
+	return false
+}
+
 // Exact normalized identity; retain version qualifiers such as live/remix.
 func matchSong(songs []Song, artist, title string) (Song, bool) {
 	var matched Song
 	for _, s := range songs {
-		if normalize(s.Title) == normalize(title) && normalize(s.Artist.Name) == normalize(artist) {
+		if normalize(s.Title) == normalize(title) && sameArtist(s.Artist.Name, artist) {
 			if matched.ID != 0 && matched.ID != s.ID {
 				return Song{}, false
 			}