Open queue sheet from tvOS player controls

Turn the tvOS bottom-row queue count indicator into a focusable button
that opens QueueManagementSheet in a fullScreenCover with an
ultraThinMaterial backdrop, matching the Settings sheet pattern. Hide
the sheet's close toolbar button on tvOS (Menu button dismisses) and
replace the unusable Menu-based queue mode picker with an icon-only
tap-to-cycle button.

Yattee/Views/Player/tvOS/TVPlayerView.swift

@@ -18,6 +18,7 @@ enum TVPlayerFocusTarget: Hashable {
     case debugButton
     case playNext
     case closeButton
+    case queueButton
 }
 
 /// Main tvOS fullscreen player view.
@@ -45,6 +46,9 @@ struct TVPlayerView: View {
     /// Whether the quality sheet is shown.
     @State private var showingQualitySheet = false
 
+    /// Whether the queue sheet is shown.
+    @State private var showingQueueSheet = false
+
     /// Whether the debug overlay is shown.
     @State private var isDebugOverlayVisible = false
 
@@ -109,6 +113,14 @@ struct TVPlayerView: View {
             .fullScreenCover(isPresented: $showingQualitySheet) {
                 qualitySheetContent
             }
+            .fullScreenCover(isPresented: $showingQueueSheet) {
+                ZStack {
+                    Rectangle()
+                        .fill(.ultraThinMaterial)
+                        .ignoresSafeArea()
+                    QueueManagementSheet()
+                }
+            }
     }
 
     // MARK: - Quality Sheet Content
@@ -195,6 +207,7 @@ struct TVPlayerView: View {
                     playerService: playerService,
                     focusedControl: $focusedControl,
                     onShowSettings: { showQualitySheet() },
+                    onShowQueue: { showQueueSheet() },
                     onShowDetails: { showDetailsPanel(tab: .info) },
                     onShowComments: { showDetailsPanel(tab: .comments) },
                     onShowDebug: { showDebugOverlay() },
@@ -419,6 +432,11 @@ struct TVPlayerView: View {
         showingQualitySheet = true
     }
 
+    private func showQueueSheet() {
+        stopControlsTimer()
+        showingQueueSheet = true
+    }
+
     private func switchToStream(_ stream: Stream, audioStream: Stream? = nil) {
         guard let video = playerState?.currentVideo else { return }