SoftAP SSID, Bluetooth name, and mDNS hostname now use the "igiRadio"
prefix (igiRadio-<serial>, igiradio-<serial>.local), matching the iOS
app's name instead of the firmware project's repo name. Confirmed live:
igiradio-CC4DB4.local resolves, the old digiradio-CC4DB4.local no
longer does.
Also adds the app-side briefs/notes accumulated today (active_source,
volume contract, VU-meter polling, RDS availability) as a single
up-to-date file to hand to Cursor.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>