Active target (set/clear/resolve person position), geofence crossing
state machine and proximity beeper move from UITask to
ui-core/LocatorEngine.h, emitting LocatorCrossed / LocatorBeep events.
UiEvent gains a flag and a 24-byte text. tickCore() now runs at the end
of UITask::loop(), where the moved engines used to run, so a fresh GPS
wake re-seeds the locator before it evaluates.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>