feat(player): add Mornye media notification controls

Sync notification favorites with Library, add Mornye transport icons and an output action on legacy Android, and expose the iOS favorite command. Preserve playback position when controls refresh.

Vendor audio_service 0.18.19 with a small Android patch for custom notification actions. Modern Android keeps its system output switcher and transport layout.

ios/Runner/AppDelegate.swift

@@ -24,6 +24,7 @@ import UniformTypeIdentifiers
     private var libraryScanProgressGeneration: UInt64 = 0
     private var backendChannel: FlutterMethodChannel?
     private var concertCalendar: ConcertCalendarBridge?
+    private var playbackNotification: PlaybackNotificationBridge?
     private let coreBackend: CoreBackend = createCoreBackend()
     private var pendingSessionGrantEvents: [[String: Any]] = []
 
@@ -110,6 +111,7 @@ import UniformTypeIdentifiers
         )
 
         GeneratedPluginRegistrant.register(with: registry)
+        playbackNotification = PlaybackNotificationBridge(messenger: messenger)
         registry.registrar(forPlugin: "AudioOutputView")?.register(
             AudioOutputViewFactory(messenger: messenger),
             withId: "com.zarz.spotiflac/audio_output"

ios/Runner/AudioOutputView.swift

@@ -1,7 +1,41 @@
 import AVKit
 import Flutter
+import MediaPlayer
 import UIKit
 
+/// iOS owns the lock-screen layout, transport glyphs and AirPlay button.
+/// Supply its favorite command with the same state/action as the Mornye player.
+final class PlaybackNotificationBridge {
+    private let channel: FlutterMethodChannel
+    private var target: Any?
+
+    init(messenger: FlutterBinaryMessenger) {
+        channel = FlutterMethodChannel(name: "com.zarz.spotiflac/playback_notification", binaryMessenger: messenger)
+        let command = MPRemoteCommandCenter.shared().likeCommand
+        target = command.addTarget { [weak self] _ in
+            guard let self else { return .commandFailed }
+            self.channel.invokeMethod("favorite", arguments: nil)
+            return .success
+        }
+        command.isEnabled = false
+        channel.setMethodCallHandler { call, result in
+            guard call.method == "update", let values = call.arguments as? [String: Any] else {
+                result(FlutterMethodNotImplemented)
+                return
+            }
+            command.isEnabled = values["enabled"] as? Bool ?? false
+            command.isActive = values["loved"] as? Bool ?? false
+            command.localizedTitle = values["label"] as? String ?? "Favorite"
+            result(nil)
+        }
+    }
+
+    deinit {
+        if let target { MPRemoteCommandCenter.shared().likeCommand.removeTarget(target) }
+        channel.setMethodCallHandler(nil)
+    }
+}
+
 final class AudioOutputViewFactory: NSObject, FlutterPlatformViewFactory {
     private let messenger: FlutterBinaryMessenger