- All hotkeys now use Ctrl+letter (Ctrl+A, Ctrl+E, Ctrl+D, Ctrl+T, Ctrl+F, Ctrl+Q)
- Works on ANY keyboard layout (EN, FR, DE, RU, etc.)
- Ctrl+letter generates same control character regardless of layout
- Updated help text and README
Rationale: Ctrl+A always produces byte 0x01 (SOH) regardless of whether
the physical key is QWERTY 'a', AZERTY 'a', or ЙЦУКЕН 'ф'. This is the
standard approach used by vim, tmux, ranger, etc.
- Hotkeys now work with both English and Russian keyboard layouts
- Argon2 memory reduced from 64MB to 4MB (faster key derivation)
- Added 'Deriving key...' progress indicator
- Help text color changed to cyan for better visibility
- Form navigation uses key types instead of strings
- README updated with layout-independent key info