ios 1.0.10: shuffle/repeat on Now Playing, playback speed

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

ios/Stemify/Core/Settings.swift

@@ -189,6 +189,10 @@ final class Settings: @unchecked Sendable {
     /// How far down Soft karaoke puts the vocals, in dB.
     var karaokeSoftDb: Int { get { read(\.karaokeSoftDb, "karaokeSoftDb", -12) } set { write(\.karaokeSoftDb, "karaokeSoftDb", newValue, -12) } }
     var keepStemMix: Bool { get { read(\.keepStemMix, "keepStemMix", true) } set { write(\.keepStemMix, "keepStemMix", newValue, true) } }
+    var playbackSpeed: Double {
+        get { access(keyPath: \.playbackSpeed); lock.lock(); defer { lock.unlock() }; return (store["playbackSpeed"] as? NSNumber)?.doubleValue ?? 1 }
+        set { write(\.playbackSpeed, "playbackSpeed", newValue, 1.0) }
+    }
     var masterVolume: Float {
         get { access(keyPath: \.masterVolume); lock.lock(); defer { lock.unlock() }; return (store["masterVolume"] as? NSNumber)?.floatValue ?? 0.85 }
         set { write(\.masterVolume, "masterVolume", newValue, 0.85) }