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.

tvOS/ControlsOverlayButton.swift

@@ -4,25 +4,52 @@ struct ControlsOverlayButton<LabelView: View>: View {
     var focusedField: FocusState<ControlsOverlay.Field?>.Binding
     var field: ControlsOverlay.Field
     let label: LabelView
+    var onSelect: (() -> Void)?
 
     init(
         focusedField: FocusState<ControlsOverlay.Field?>.Binding,
         field: ControlsOverlay.Field,
+        onSelect: (() -> Void)? = nil,
         @ViewBuilder label: @escaping () -> LabelView
     ) {
         self.focusedField = focusedField
         self.field = field
+        self.onSelect = onSelect
         self.label = label()
     }
 
     var body: some View {
-        label
-            .padding()
-            .frame(width: 400)
-            .focusable()
+        let isFocused = focusedField.wrappedValue == field
+
+        if let onSelect {
+            Button(action: onSelect) {
+                label
+                    .padding()
+                    .frame(width: 400)
+            }
+            .buttonStyle(TVButtonStyle(isFocused: isFocused))
             .focused(focusedField, equals: field)
-            .background(focusedField.wrappedValue == field ? Color.white : Color.secondary)
-            .foregroundColor(focusedField.wrappedValue == field ? Color.black : Color.white)
-            .clipShape(RoundedRectangle(cornerRadius: 4))
+        } else {
+            label
+                .padding()
+                .frame(width: 400)
+                .focusable()
+                .focused(focusedField, equals: field)
+                .background(isFocused ? Color.white : Color.secondary)
+                .foregroundColor(isFocused ? Color.black : Color.white)
+                .clipShape(RoundedRectangle(cornerRadius: 4))
+        }
+    }
+}
+
+struct TVButtonStyle: ButtonStyle {
+    let isFocused: Bool
+
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .background(isFocused ? Color.white : Color.secondary)
+            .foregroundColor(isFocused ? Color.black : Color.white)
+            .clipShape(RoundedRectangle(cornerRadius: 4))
+            .scaleEffect(configuration.isPressed ? 0.95 : 1.0)
     }
 }