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

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

ios/Stemify/Playback/PlaybackManager.swift

@@ -123,6 +123,7 @@ final class PlaybackManager: StemEngineListener, @unchecked Sendable {
     private(set) var stemNames: [String] = []
     private(set) var mix: [String: StemSetting] = [:]
     private(set) var master: Float
+    private(set) var speed = 1.0
     private(set) var waveform: Waveform?
     private(set) var durationMs: Int64 = 0
     private(set) var message: AppMessage?
@@ -165,6 +166,8 @@ final class PlaybackManager: StemEngineListener, @unchecked Sendable {
         eq.onParams = { [weak self] p in self?.engine.eqParams = p }
         engine.eqParams = eq.currentParams()
         engine.masterGain = masterTaper(master)
+        speed = settings.playbackSpeed
+        engine.setSpeed(speed)
         restore()
         observeSession()
         Task { @MainActor [weak self] in
@@ -329,6 +332,15 @@ final class PlaybackManager: StemEngineListener, @unchecked Sendable {
 
     func setShuffle(_ on: Bool) { if on != shuffle { toggleShuffle() } }
 
+    static let speeds: [Double] = [0.5, 0.75, 0.9, 1, 1.1, 1.25, 1.5, 2]
+
+    func setSpeed(_ v: Double) {
+        speed = min(max(v, 0.5), 2)
+        engine.setSpeed(speed)
+        settings.playbackSpeed = speed
+        changed()
+    }
+
     // ---- transport ----------------------------------------------------------------------
 
     func play() {