v2.2.1-alpha

Fixes:
• Updater now suspends curses (curses.endwin()) before running downloads, pip installs, or sudo file operations, and restores the UI afterward. This prevents invisible output and redraw glitches during updates.

Improvements:
• Clear terminal progress is printed while updates run outside curses.
• Post-update prompt offers to restart sush for a clean relaunch.
• Internal version string bumped to 2.2.1-alpha.

Notes:
• Behavior and features from 2.2-alpha are unchanged aside from the update flow fix and minor UX polish.