feat: 增加钻带涨缩功能，支持倍率/PPM模式缩放坐标

- 新增 ExcellonScaler 引擎：普通孔缩放坐标，G85槽孔保护槽长，刀具定义行原样保留
- 新增 DrillScalingWindow 参数设置窗口：倍率/PPM模式切换，X/Y独立输入
- 集成到启动功能菜单：.dr2/.dpin 文件显示"涨缩"按钮
- 输出覆盖原文件 + .bak 备份，GB2312 编码

App.xaml.cs

@@ -48,6 +48,8 @@ namespace DrillTools
 
             bool canClearParameters = DrillTapeParameterCleaner.CanClearParameters(content);
             bool canGeneratePpDrillTape = viewModel.CanGeneratePpDrillTape;
+            string extension = Path.GetExtension(filePath).ToLowerInvariant();
+            bool canScaleDrillTape = extension == ".dr2" || extension == ".dpin";
             double minDrill = viewModel.MinDrillDiameter;
             double minSlot = viewModel.MinSlotDiameter;
             double minEA = viewModel.MinEADiameter;
@@ -62,6 +64,7 @@ namespace DrillTools
                 filePath,
                 canClearParameters,
                 canGeneratePpDrillTape,
+                canScaleDrillTape,
                 minDrill,
                 minSlot,
                 minEA,
@@ -91,6 +94,10 @@ namespace DrillTools
                     PerformPpDrillTapeGeneration(filePath);
                     Shutdown();
                     break;
+                case StartupAction.ScaleDrillTape:
+                    PerformDrillScaling(filePath);
+                    Shutdown();
+                    break;
                 default:
                     Shutdown();
                     break;
@@ -191,6 +198,42 @@ namespace DrillTools
             }
         }
 
+        private static void PerformDrillScaling(string filePath)
+        {
+            try
+            {
+                var scalingWindow = new DrillScalingWindow();
+                scalingWindow.ShowDialog();
+
+                if (scalingWindow.ScalingResult == null)
+                    return;
+
+                var (kx, ky) = scalingWindow.ScalingResult.Value;
+
+                string content = CommandTypeFileReader.ReadAllText(filePath);
+                string scaledContent = Integration.ExcellonScaler.Scale(content, kx, ky);
+
+                // 备份原文件
+                string backupFilePath = filePath + ".bak";
+                File.Copy(filePath, backupFilePath, true);
+
+                // 写入缩放后的内容
+                using var writer = new StreamWriter(filePath, false, Encoding.GetEncoding(936));
+                writer.Write(scaledContent);
+
+                System.Windows.MessageBox.Show(
+                    $"涨缩完成，原文件已备份为：\n{Path.GetFileName(filePath)}.bak",
+                    "涨缩完成",
+                    MessageBoxButton.OK,
+                    MessageBoxImage.Information);
+            }
+            catch (Exception ex)
+            {
+                System.Windows.MessageBox.Show($"涨缩失败：\n{ex.Message}",
+                    "错误", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+        }
+
         private static void RegisterShellContextMenu()
         {
             try