fix(metadata): match by primary artist and review results #511

lib/utils/artist_utils.dart

@@ -1,5 +1,5 @@
 final RegExp _artistNameSplitPattern = RegExp(
-  r'\s*(?:,|&|\bx\b)\s*|\s+\b(?:feat(?:uring)?|ft|with)\.?(?=\s|$)\s*',
+  r'\s*(?:,|;|&|\bx\b)\s*|\s+\b(?:feat(?:uring)?|ft|with)\.?(?=\s|$)\s*',
   caseSensitive: false,
 );
 
@@ -17,6 +17,22 @@ List<String> splitArtistNames(String rawArtists) {
       .toList(growable: false);
 }
 
+String primaryArtistName(String artists, {String? albumArtist}) {
+  final preferred = albumArtist?.trim() ?? '';
+  final normalizedPreferred = preferred.toLowerCase();
+  final useAlbumArtist =
+      preferred.isNotEmpty &&
+      normalizedPreferred != 'various artists' &&
+      normalizedPreferred != 'various' &&
+      normalizedPreferred != 'va';
+  final source = useAlbumArtist ? preferred : artists.trim();
+  final split = splitArtistNames(source);
+  if (split.isNotEmpty) return split.first;
+
+  final fallback = splitArtistNames(artists);
+  return fallback.isNotEmpty ? fallback.first : artists.trim();
+}
+
 bool shouldSplitVorbisArtistTags(String mode) {
   return mode == artistTagModeSplitVorbis;
 }