feat: PP钻带基础信息显示X/Y间距

检测PP钻带（文件名-pp结尾、4孔、直径4.000），计算上下孔X间距和左右孔Y间距
（欧氏距离），在MainWindow和StartupSelectionWindow的基础信息中显示。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

App.xaml.cs

@@ -37,7 +37,8 @@ namespace DrillTools
             bool canClearParameters = CanClearDrillTapeParameters(filePath);
             bool canGeneratePpDrillTape = CanGeneratePpDrillTape(filePath);
             GetMinDiameters(filePath, out double minDrill, out double minSlot, out double minEA);
-            var selectionWindow = new StartupSelectionWindow(filePath, canClearParameters, canGeneratePpDrillTape, minDrill, minSlot, minEA);
+            GetPpSpacing(filePath, out bool isPpDrillTape, out double ppXSpacing, out double ppYSpacing);
+            var selectionWindow = new StartupSelectionWindow(filePath, canClearParameters, canGeneratePpDrillTape, minDrill, minSlot, minEA, isPpDrillTape, ppXSpacing, ppYSpacing);
             selectionWindow.ShowDialog();
 
             switch (selectionWindow.SelectedAction)
@@ -173,6 +174,32 @@ namespace DrillTools
             }
         }
 
+        private static void GetPpSpacing(string filePath, out bool isPpDrillTape, out double ppXSpacing, out double ppYSpacing)
+        {
+            isPpDrillTape = false;
+            ppXSpacing = 0;
+            ppYSpacing = 0;
+
+            try
+            {
+                var viewModel = new MainWindowViewModel
+                {
+                    OriginalFilePath = filePath,
+                    ShouldCheckSortFileOnLoad = false
+                };
+
+                string content = CommandTypeFileReader.ReadAllText(filePath);
+                viewModel.LoadToolsFromDrillTape(content);
+
+                isPpDrillTape = viewModel.IsPpDrillTape;
+                ppXSpacing = viewModel.PpXSpacing;
+                ppYSpacing = viewModel.PpYSpacing;
+            }
+            catch
+            {
+            }
+        }
+
         private static void PerformPpDrillTapeGeneration(string filePath)
         {
             try