fix:无焦点功能状态丢失

Ink Canvas/MainWindow.xaml.cs

@@ -50,6 +50,9 @@ namespace Ink_Canvas
         // 墨迹渐隐管理器
         private InkFadeManager _inkFadeManager;
 
+        // 设置面板相关状态
+        private bool userChangedNoFocusModeInSettings;
+
 
 
         #region Window Initialization
@@ -1933,6 +1936,12 @@ namespace Ink_Canvas
             {
                 ApplyAlwaysOnTop();
             }
+
+            // 如果当前在设置面板中，标记用户已修改无焦点模式设置
+            if (BorderSettings.Visibility == Visibility.Visible)
+            {
+                userChangedNoFocusModeInSettings = true;
+            }
         }
 
         private void ToggleSwitchAlwaysOnTop_Toggled(object sender, RoutedEventArgs e)