Reapply "fix:issue #201"

This reverts commit f40ef15a24.

Ink Canvas/Helpers/InkFadeManager.cs

@@ -71,6 +71,11 @@ namespace Ink_Canvas.Helpers
 
             try
             {
+                // 确保主窗口的InkCanvas保持Ink编辑模式，防止墨迹渐隐时切换到鼠标模式
+                if (_mainWindow.inkCanvas.EditingMode != InkCanvasEditingMode.Ink)
+                {
+                    _mainWindow.inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
+                }
 
                 // 记录墨迹的起点和终点
                 _strokeStartPoints[stroke] = startPoint;

Ink Canvas/MainWindow_cs/MW_SimulatePressure&InkToShape.cs

@@ -9,6 +9,7 @@ using System.Windows.Controls;
 using System.Windows.Ink;
 using System.Windows.Input;
 using System.Windows.Media;
+using System.Windows.Threading;
 using Point = System.Windows.Point;
 
 namespace Ink_Canvas
@@ -63,10 +64,10 @@ namespace Ink_Canvas
                 var startPoint = e.Stroke.StylusPoints.Count > 0 ? e.Stroke.StylusPoints[0].ToPoint() : new Point();
                 var endPoint = e.Stroke.StylusPoints.Count > 0 ? e.Stroke.StylusPoints[e.Stroke.StylusPoints.Count - 1].ToPoint() : new Point();
 
-                // 从InkCanvas中移除墨迹，因为我们要用渐隐管理器来管理它
-                if (inkCanvas.Strokes.Contains(e.Stroke))
+                // 确保InkCanvas保持Ink编辑模式，防止自动切换到鼠标模式
+                if (inkCanvas.EditingMode != InkCanvasEditingMode.Ink)
                 {
-                    inkCanvas.Strokes.Remove(e.Stroke);
+                    inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
                 }
 
                 // 添加到墨迹渐隐管理器
@@ -79,6 +80,30 @@ namespace Ink_Canvas
                     LogHelper.WriteLogToFile("StrokeCollected: 墨迹渐隐管理器为空，无法添加墨迹", LogHelper.LogType.Error);
                 }
 
+                // 延迟移除墨迹，避免立即移除导致模式切换
+                // 使用Dispatcher.BeginInvoke确保在UI线程上异步执行
+                Dispatcher.BeginInvoke(new Action(() =>
+                {
+                    try
+                    {
+                        // 再次确保InkCanvas保持Ink编辑模式
+                        if (inkCanvas.EditingMode != InkCanvasEditingMode.Ink)
+                        {
+                            inkCanvas.EditingMode = InkCanvasEditingMode.Ink;
+                        }
+
+                        // 从InkCanvas中移除墨迹，因为我们要用渐隐管理器来管理它
+                        if (inkCanvas.Strokes.Contains(e.Stroke))
+                        {
+                            inkCanvas.Strokes.Remove(e.Stroke);
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        LogHelper.WriteLogToFile($"延迟移除墨迹时出错: {ex}", LogHelper.LogType.Error);
+                    }
+                }), DispatcherPriority.Background);
+
                 // 墨迹渐隐模式下不参与墨迹纠正和其他处理，直接返回
                 return;
             }