Convert tvOS settings and queue overlays to half-screen panels

The Settings (quality/audio/subtitles) and Queue panels now slide in
from the right and occupy the right half of the screen, matching the
info/comments details panel introduced in 92cc8b79f. Video stays
visible on the left so the user retains visual context while browsing.

Both panels supply their own ultraThinMaterial backdrop and use a
custom title bar (replacing NavigationStack's auto-title on tvOS) so
the title styling and symmetric padding match across panels and
across pushed destination screens. The Menu button now pops the
quality panel's pushed Video/Audio/Subtitles detail screens before
dismissing the panel itself.

Removes the background Button from the focus tree while either panel
is open so D-pad left/right inside a row no longer escapes focus
into the player and triggers a seek. Initial focus is steered into
the first row programmatically since tvOS doesn't auto-focus inline
overlays the way it does for fullScreenCover.

Doubles the queue thumbnail size on tvOS (160x90) for readability at
the half-screen panel width.

Yattee/Views/Player/QueueItemRow.swift

@@ -45,7 +45,11 @@ struct QueueItemRow: View {
                     cornerRadius: 6,
                     duration: queuedVideo.video.formattedDuration
                 )
+                #if os(tvOS)
+                .frame(width: 160, height: 90)
+                #else
                 .frame(width: 80, height: 45)
+                #endif
                 .opacity(isCurrentlyPlaying ? 0.6 : 1.0)
 
                 // Video info