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>

StartupSelectionWindow.xaml

@@ -24,10 +24,20 @@
                 <StackPanel Grid.Row="0" Orientation="Horizontal">
                     <TextBlock VerticalAlignment="Center" Text="文件名：" />
                     <TextBlock
-                        Margin="0,0,0,5"
+                        Margin="0,0,10,5"
                         VerticalAlignment="Center"
                         FontWeight="Bold"
                         Text="{Binding FileName}" />
+                    <TextBlock
+                        Margin="10,0,0,5"
+                        VerticalAlignment="Center"
+                        Visibility="{Binding IsPpDrillTape, Converter={StaticResource BooleanToVisibilityConverter}}"
+                        Text="{Binding PpXSpacing, StringFormat=X间距: {0:F3}}" />
+                    <TextBlock
+                        Margin="10,0,0,5"
+                        VerticalAlignment="Center"
+                        Visibility="{Binding IsPpDrillTape, Converter={StaticResource BooleanToVisibilityConverter}}"
+                        Text="{Binding PpYSpacing, StringFormat=Y间距: {0:F3}}" />
                 </StackPanel>
 
                 <Grid Grid.Row="1">