improve:墨迹渐隐

Ink Canvas/MainWindow_cs/MW_FloatingBarIcons.cs

@@ -948,7 +948,8 @@ namespace Ink_Canvas
             randWindow.Show();
             // 确保窗口显示后立即置顶
             randWindow.Activate();
-            WindowZOrderManager.BringToTop(randWindow);
+            randWindow.Topmost = true;
+            randWindow.Focus();
         }
 
         public void CheckEraserTypeTab()

Ink Canvas/MainWindow_cs/MW_TrayIcon.cs

@@ -30,11 +30,10 @@ namespace Ink_Canvas
             var mainWin = (MainWindow)Current.MainWindow;
             if (mainWin.IsLoaded)
             {
-                // 通知Z-Order管理器有系统菜单打开
-                // 这会导致主窗口暂时取消置顶，让系统菜单能够正常显示
+                // 在无焦点模式下，暂时取消主窗口置顶，让系统菜单能够正常显示
                 if (Ink_Canvas.MainWindow.Settings.Advanced.IsAlwaysOnTop && Ink_Canvas.MainWindow.Settings.Advanced.IsNoFocusMode)
                 {
-                    WindowZOrderManager.SetWindowTopmost(mainWin, false);
+                    mainWin.Topmost = false;
                 }
 
                 // 判斷是否在收納模式中
@@ -72,7 +71,7 @@ namespace Ink_Canvas
                 // 菜单关闭后，恢复主窗口的置顶状态
                 if (Ink_Canvas.MainWindow.Settings.Advanced.IsAlwaysOnTop && Ink_Canvas.MainWindow.Settings.Advanced.IsNoFocusMode)
                 {
-                    WindowZOrderManager.SetWindowTopmost(mainWin, true);
+                    mainWin.Topmost = true;
                 }
             }
         }