Revert "fix:触摸墨迹选中"

This reverts commit 8172b7c776.

Ink Canvas/MainWindow_cs/MW_TouchEvents.cs

@@ -5,7 +5,6 @@ using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Ink;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
@@ -582,27 +581,6 @@ namespace Ink_Canvas
                 var touchPoint = e.GetTouchPoint(inkCanvas);
                 centerPoint = touchPoint.Position;
 
-                // 检查是否有选中的墨迹，如果有且触摸点在选择框外，则取消选择
-                if (inkCanvas.EditingMode == InkCanvasEditingMode.Select && inkCanvas.GetSelectedStrokes().Count > 0)
-                {
-                    var touchPosition = touchPoint.Position;
-                    var selectionBounds = inkCanvas.GetSelectionBounds();
-
-                    // 检查触摸位置是否在选择框边界外
-                    if (touchPosition.X < selectionBounds.Left ||
-                        touchPosition.X > selectionBounds.Right ||
-                        touchPosition.Y < selectionBounds.Top ||
-                        touchPosition.Y > selectionBounds.Bottom)
-                    {
-                        // 触摸在选择框外，取消选择
-                        inkCanvas.Select(new StrokeCollection());
-                        if (GridInkCanvasSelectionCover != null)
-                        {
-                            GridInkCanvasSelectionCover.Visibility = Visibility.Collapsed;
-                        }
-                    }
-                }
-
                 //记录第一根手指点击时的 StrokeCollection
                 lastTouchDownStrokeCollection = inkCanvas.Strokes.Clone();
             }