radioGroupNav now accepts an onChange callback; PersonTypeSelector passes
select() as the callback so ArrowLeft/Right navigation updates the hidden
input value. aria-live region starts empty and announces only on user
interaction (fixes initial page-load announcement).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
The action already checks event.defaultPrevented before dispatching
clickoutside, but that branch had no test. Add the missing case and
add a one-line comment explaining why capture phase is used.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
