ui: blend titlebars into player background

Sources/App/TerebiApp.swift

@@ -998,7 +998,6 @@ final class PlayerModel: ObservableObject {
 
 @MainActor
 private struct PlayerGlass: NSViewRepresentable {
-    var titlebar = false
     var blendingMode: NSVisualEffectView.BlendingMode = .withinWindow
 
     func makeNSView(context: Context) -> NSVisualEffectView {
@@ -1006,7 +1005,7 @@ private struct PlayerGlass: NSViewRepresentable {
         view.blendingMode = blendingMode
         view.state = .active
         view.appearance = NSAppearance(named: .vibrantDark)
-        view.material = titlebar ? .titlebar : .hudWindow
+        view.material = .hudWindow
         return view
     }
 
@@ -1245,7 +1244,6 @@ private struct PlayerContent: View {
         .padding(.trailing, 12)
         .frame(height: 32)
         .foregroundStyle(.white.opacity(0.6))
-        .background(PlayerGlass(titlebar: true).allowsHitTesting(false))
         .onHover(perform: model.setTitleHovered)
         .opacity(model.controlsVisible ? 1 : 0)
         .allowsHitTesting(model.controlsVisible)
@@ -1500,7 +1498,6 @@ private struct PlayerContent: View {
                         .padding(8)
                         .frame(maxWidth: .infinity)
                         .foregroundStyle(.white.opacity(0.75))
-                        .background(PlayerGlass(titlebar: true))
                         .opacity(model.controlsVisible ? 1 : 0)
                         .allowsHitTesting(false)
                         .accessibilityHidden(!model.controlsVisible)
@@ -1617,6 +1614,7 @@ private struct WindowChrome: NSViewRepresentable {
             window.styleMask.insert(.fullSizeContentView)
             window.titleVisibility = .hidden
             window.titlebarAppearsTransparent = true
+            window.titlebarSeparatorStyle = .none
             window.isOpaque = false
             window.backgroundColor = .clear
             window.acceptsMouseMovedEvents = true