Copyosity 0.9.1 — auto-update fix

Fixes auto-update actually applying. The menu-bar app blocked every exit (to stay in the tray), which also swallowed the updater's relaunch — so a downloaded update never installed. Now programmatic restart/exit is allowed through while window-close still keeps the app in the tray.

⚠️ Your current version has the bug, so install this 0.9.1 manually once; from here on updates apply on their own.

Also includes the new agent chat (0.9.0). Auto-update via vkovalskii.com mirror + GitHub fallback.