Dynamically update page title emoji when device/alert status changes:
- Add PubSub broadcasts when alerts are created/resolved
- Create StatusTitleComponent LiveComponent to subscribe to alert changes
- Add StatusTitle JavaScript hook to update document.title in real-time
- Subscribe to organization:alerts channel on LiveView mount
- Push emoji update events when alert status changes
This provides immediate visual feedback in browser tabs when
critical/warning/healthy status changes without requiring page refresh.
