ios: karaoke vocals On/Soft/Off (1.0.6)

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

ios/Stemify/Core/Settings.swift

@@ -185,6 +185,7 @@ final class Settings: @unchecked Sendable {
     var downloadsWifiOnly: Bool { get { read(\.downloadsWifiOnly, "downloadsWifiOnly", true) } set { write(\.downloadsWifiOnly, "downloadsWifiOnly", newValue, true) } }
     /// Downloads page order: 0 download order, 1 artist, 2 release date.
     var downloadSort: Int { get { read(\.downloadSort, "downloadSort", 0) } set { write(\.downloadSort, "downloadSort", newValue, 0) } }
+    var karaokeVocals: Int { get { read(\.karaokeVocals, "karaokeVocals", KaraokeVocals.Off.rawValue) } set { write(\.karaokeVocals, "karaokeVocals", newValue, KaraokeVocals.Off.rawValue) } }
     var keepStemMix: Bool { get { read(\.keepStemMix, "keepStemMix", true) } set { write(\.keepStemMix, "keepStemMix", newValue, true) } }
     var masterVolume: Float {
         get { access(keyPath: \.masterVolume); lock.lock(); defer { lock.unlock() }; return (store["masterVolume"] as? NSNumber)?.floatValue ?? 0.85 }