Revert "feat: 选区截图时保留屏幕笔迹 (#406)" (#418)

This reverts commit f7aa107a62.

Ink Canvas/Windows/ScreenshotSelectorWindow.xaml.cs

@@ -37,7 +37,6 @@ namespace Ink_Canvas
         private Bitmap _capturedCameraImage = null;
         private DateTime _lastBlankClickTime = DateTime.MinValue;
         private WpfPoint _lastBlankClickPosition;
-        private readonly Action<bool> _includeInkPreviewChanged;
 
         private const int DoubleClickTimeThresholdMs = 300; // 双击判定时间阈值（常见范围 200~500ms）
         private const double DoubleClickDistanceThresholdPx = 12; // 双击判定位置阈值（像素）
@@ -56,17 +55,10 @@ namespace Ink_Canvas
         public Bitmap CameraImage { get; private set; }
         public System.Windows.Media.Imaging.BitmapSource CameraBitmapSource { get; private set; }
         public bool ShouldAddToWhiteboard { get; private set; }
-        public bool ShouldIncludeInk { get; private set; } = true;
 
         public ScreenshotSelectorWindow()
-            : this(null)
-        {
-        }
-
-        public ScreenshotSelectorWindow(Action<bool> includeInkPreviewChanged)
         {
             InitializeComponent();
-            _includeInkPreviewChanged = includeInkPreviewChanged;
 
             // 设置窗口覆盖所有屏幕
             SetupFullScreenOverlay();
@@ -92,8 +84,6 @@ namespace Ink_Canvas
                 timer.Stop();
             };
             timer.Start();
-
-            ApplyIncludeInkPreviewState(ShouldIncludeInk);
         }
 
         private void InitializeFreehandMode()
@@ -539,30 +529,6 @@ namespace Ink_Canvas
             ConfirmSelection();
         }
 
-        private void IncludeInkCheckBox_Checked(object sender, RoutedEventArgs e)
-        {
-            ShouldIncludeInk = true;
-            ApplyIncludeInkPreviewState(ShouldIncludeInk);
-        }
-
-        private void IncludeInkCheckBox_Unchecked(object sender, RoutedEventArgs e)
-        {
-            ShouldIncludeInk = false;
-            ApplyIncludeInkPreviewState(ShouldIncludeInk);
-        }
-
-        private void ApplyIncludeInkPreviewState(bool shouldIncludeInk)
-        {
-            try
-            {
-                _includeInkPreviewChanged?.Invoke(shouldIncludeInk);
-            }
-            catch (Exception ex)
-            {
-                LogHelper.WriteLogToFile($"更新“包含墨迹”实时预览失败: {ex.Message}", LogHelper.LogType.Warning);
-            }
-        }
-
         private void ConfirmCameraCapture()
         {
             try
@@ -1514,9 +1480,6 @@ namespace Ink_Canvas
         {
             try
             {
-                // 关闭窗口时恢复墨迹预览状态
-                ApplyIncludeInkPreviewState(true);
-
                 // 清理摄像头资源
                 if (_cameraService != null)
                 {