- Added 7z compression support in Compression Tab (ZIP/7z radio buttons)
- Added Status column to compressed archives pane ("Extracted" indicator)
- Added "Delete Extracted Only" button mirroring "Delete Archived Only"
- Replaced 7z.exe subprocess dependency with py7zr Python library
- Added archive limitation warnings to Duplicates and Compare tabs
- Improved CHD conversion feedback for large files
- Calmer Conversion Tab info messaging
- Bumped version to 1.2.1
- Updated CHANGELOG, README, and release documentation
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
