- Added 2FA recovery codes with "Mark as Used" feature in GUI and CLI.
- Hardened password generation with guaranteed entropy and Fisher-Yates shuffle.
- Modernized GUI with icon-only toolbar and fixed stability/TOTP issues.
- Relocated password generator to core and synchronized CLI features.
- Optimized build system: fixed FORTIFY_SOURCE and CMocka warnings, standardized
installation paths, and updated CI/CD for all platforms (Linux/Win/macOS).
- Updated all documentation (CHANGELOG, SECURITY, Doxyfile, USER_GUIDE).