修复DriveInfo.VolumeTitle编译错误

将 drive.VolumeTitle 改为 drive.VolumeLabel
在.NET Framework中，DriveInfo类使用VolumeLabel属性而不是VolumeTitle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Form1.cs

@@ -394,7 +394,7 @@ namespace SlideCombine
                         foreach (var drive in DriveInfo.GetDrives())
                         {
                             var driveNode = new TreeNode();
-                            driveNode.Text = $"{drive.Name} ({drive.VolumeTitle})";
+                            driveNode.Text = $"{drive.Name} ({drive.VolumeLabel})";
                             driveNode.Tag = drive.Name;
 
                             if (drive.IsReady)