Improve tvOS controls overlay with single-press menus

Changed context menus from press-and-hold to single-press for better UX:
- Quality profile selection
- Stream quality selection
- Captions selection
- Audio track selection

Updated ControlsOverlayButton to support tap actions via new onSelect parameter.
Replaced .contextMenu modifiers with .alert for instant menu access on tvOS.
Removed hint text and unnecessary 80px padding as single-press is self-evident.

Shared/Player/StreamControl.swift

@@ -3,9 +3,11 @@ import SwiftUI
 struct StreamControl: View {
     #if os(tvOS)
         var focusedField: FocusState<ControlsOverlay.Field?>.Binding?
+        @Binding var presentingStreamMenu: Bool
 
-        init(focusedField: FocusState<ControlsOverlay.Field?>.Binding?) {
+        init(focusedField: FocusState<ControlsOverlay.Field?>.Binding?, presentingStreamMenu: Binding<Bool>) {
             self.focusedField = focusedField
+            _presentingStreamMenu = presentingStreamMenu
         }
     #endif
 
@@ -45,16 +47,20 @@ struct StreamControl: View {
                     .fixedSize()
                 #endif
             #else
-                ControlsOverlayButton(focusedField: focusedField!, field: .stream) {
+                ControlsOverlayButton(
+                    focusedField: focusedField!,
+                    field: .stream,
+                    onSelect: { presentingStreamMenu = true }
+                ) {
                     Text(player.streamSelection?.shortQuality ?? "loading")
                         .frame(maxWidth: 320)
                 }
-                .contextMenu {
+                .alert("Stream Quality", isPresented: $presentingStreamMenu) {
                     ForEach(streams) { stream in
                         Button(stream.description) { player.streamSelection = stream }
                     }
 
-                    Button("Close", role: .cancel) {}
+                    Button("Cancel", role: .cancel) {}
                 }
             #endif
         }
@@ -79,7 +85,7 @@ struct StreamControl: View {
 struct StreamControl_Previews: PreviewProvider {
     static var previews: some View {
         #if os(tvOS)
-            StreamControl(focusedField: .none)
+            StreamControl(focusedField: .none, presentingStreamMenu: .constant(false))
                 .injectFixtureEnvironmentObjects()
         #else
             StreamControl()