improve:启动动画

Ink Canvas/App.xaml.cs

@@ -911,14 +911,22 @@ namespace Ink_Canvas
             mainWindow.Loaded += (s, args) =>
             {
                 if (_isSplashScreenShown)
+                {
+                    SetSplashMessage("正在完成初始化...");
+                    SetSplashProgress(90);
+                    Task.Delay(300).ContinueWith(_ =>
+                    {
+                        Dispatcher.Invoke(() =>
                         {
                             SetSplashMessage("启动完成！");
                             SetSplashProgress(100);
                             // 延迟关闭启动画面，让用户看到完成消息
-                    Task.Delay(500).ContinueWith(_ =>
+                            Task.Delay(500).ContinueWith(__ =>
                             {
                                 Dispatcher.Invoke(() => CloseSplashScreen());
                             });
+                        });
+                    });
                 }
             };