Keep player buttons off the hinge in book posture

On a foldable with the hinge partially open in landscape, the fullscreen
player's buttons move to the half right of the hinge. The dimming
background and tap handling still cover the whole screen.

Yattee/Views/Player/PlayerControlsView.swift

@@ -149,6 +149,10 @@ struct PlayerControlsView: View {
     @Environment(\.statusBarVisibilityController) private var statusBarController
     /// Active player controls layout from preset (passed from parent to avoid flashing during view recreation)
     var activeLayout: PlayerControlsLayout = .default
+    /// Moves the buttons off the leading part of the controls frame while the
+    /// dimming background and tap handling keep covering all of it (foldable
+    /// book posture: buttons on the half right of the hinge).
+    var buttonsLeadingInset: CGFloat = 0
     /// Animation trigger for seek backward button
     @State private var seekBackwardTrigger = false
     /// Animation trigger for seek forward button
@@ -512,6 +516,7 @@ struct PlayerControlsView: View {
 
             // Controls layout - explicitly fill parent bounds
             controlsVStack
+                .padding(.leading, buttonsLeadingInset)
                 .frame(maxWidth: .infinity, maxHeight: .infinity)
         }
     }