Sturdier connections and clearer setup messaging

ALEX reconnects on its own after a dropped connection — no restart needed.

Clearer reset messaging: when ALEX just needs to reconnect, it no longer asks you to re-enter your API key.

Fixed a rare silent stall where ALEX could stop responding — a new watchdog now detects it and recovers automatically.

Voice messages: fixed feedback so you can tell when ALEX is listening and working.

Improved auto-update reliability so you always land on the latest version.

Refined connection-status and reset copy so it's easier to understand at a glance.