fix: set window background to black

Sources/MiniPlayerApp.swift

@@ -125,6 +125,43 @@ struct MiniPlayerApp: App {
     }
 }
 
+// MARK: - AVPlayerLayer 直接渲染（无内置控制栏）
+struct PlayerLayerView: NSViewRepresentable {
+    let player: AVPlayer
+    
+    func makeNSView(context: Context) -> NSView {
+        let view = PlayerLayerHostView()
+        view.playerLayer.player = player
+        view.playerLayer.videoGravity = .resizeAspect
+        return view
+    }
+    
+    func updateNSView(_ nsView: NSView, context: Context) {
+        if let host = nsView as? PlayerLayerHostView {
+            host.playerLayer.player = player
+        }
+    }
+}
+
+class PlayerLayerHostView: NSView {
+    let playerLayer = AVPlayerLayer()
+    
+    override init(frame: CGRect) {
+        super.init(frame: frame)
+        wantsLayer = true
+        layer = playerLayer
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func layout() {
+        super.layout()
+        playerLayer.frame = bounds
+    }
+}
+
 // MARK: - BricksView wrapper
 struct BricksAppView: View {
     @ObservedObject var bridge: PlayerBridge
@@ -147,15 +184,10 @@ struct BricksAppView: View {
     
     var body: some View {
         ZStack(alignment: .topLeading) {
-            // Bricks 渲染视频播放器（占满全屏）
-            if let json = jsonString {
-                BricksView(json: json, engine: engine)
-            } else {
-                ProgressView("Loading UI...")
-                    .task {
-                        jsonString = loadJSONString()
-                    }
-            }
+            Color.black.ignoresSafeArea()
+            // 直接用 AVPlayerLayer 渲染视频（彻底绕过 AVPlayerView 内置控制栏）
+            PlayerLayerView(player: bridge.player)
+                .frame(maxWidth: .infinity, maxHeight: .infinity)
             
             // 左上角应用图标 — 点击切换控制栏
             MiniPlayerIcon()