[jli-software]

Summary

• enlarge the large PDF/XPS warning dialog and make it resizable
• wrap all option text and retain access through a vertical scrollbar at high text scaling
• add a final cancellation check before atomically replacing an existing export
• make local-backup copying cancellable between files and clarify cooperative COM cancellation
• bump the application and installer version to 1.2.1

Verification

• native Windows Release build: 0 warnings, 0 errors
• self-contained win-x64 publish: successful
• GitHub Actions installer build required before merge