feat(ui): 更新品牌启动页与选集交互

ios/Runner/AppDelegate.swift

@@ -10,7 +10,7 @@ final class RunnerFlutterViewController: FlutterViewController {
 
   override func viewDidLoad() {
     super.viewDidLoad()
-    view.backgroundColor = .black
+    view.backgroundColor = UIColor(red: 16.0 / 255.0, green: 12.0 / 255.0, blue: 10.0 / 255.0, alpha: 1)
   }
 }