Fix tvOS streams selection

Model/PlayerModel.swift

@@ -22,8 +22,8 @@ final class PlayerModel: ObservableObject {
     @Published var stream: Stream?
     @Published var currentRate: Float?
 
-    @Published var availableStreams = [Stream]()
-    @Published var streamSelection: Stream?
+    @Published var availableStreams = [Stream]() { didSet { rebuildStreamsMenu() } }
+    @Published var streamSelection: Stream? { didSet { rebuildStreamsMenu() } }
 
     @Published var queue = [PlayerQueueItem]()
     @Published var currentItem: PlayerQueueItem!

Model/PlayerStreams.swift

@@ -1,5 +1,6 @@
 import Foundation
 import Siesta
+import SwiftUI
 
 extension PlayerModel {
     var isLoadingAvailableStreams: Bool {
@@ -85,12 +86,47 @@ extension PlayerModel {
         completionHandler: @escaping ([Stream]) -> Void
     ) {
         instancesWithLoadedStreams.append(instance)
+        rebuildStreamsMenu()
 
         if instances.all.count == instancesWithLoadedStreams.count {
             completionHandler(streams.sorted { $0.kind < $1.kind })
         }
     }
 
+    #if os(tvOS)
+        var streamsMenu: UIMenu {
+            UIMenu(
+                title: "Streams",
+                image: UIImage(systemName: "antenna.radiowaves.left.and.right"),
+                children: streamsMenuActions
+            )
+        }
+
+        var streamsMenuActions: [UIAction] {
+            guard !availableStreams.isEmpty else {
+                return [ // swiftlint:disable:this implicit_return
+                    UIAction(title: "Empty", attributes: .disabled) { _ in }
+                ]
+            }
+
+            return availableStreamsSorted.map { stream in
+                let state = stream == streamSelection ? UIAction.State.on : .off
+
+                return UIAction(title: stream.description, state: state) { _ in
+                    self.streamSelection = stream
+                    self.upgradeToStream(stream)
+                }
+            }
+        }
+
+    #endif
+
+    func rebuildStreamsMenu() {
+        #if os(tvOS)
+            avPlayerViewController?.transportBarCustomMenuItems = [streamsMenu]
+        #endif
+    }
+
     func streamsWithInstance(instance: Instance, streams: [Stream]) -> [Stream] {
         streams.map { stream in
             stream.instance = instance