The phone picker of <x-section-nav> drew the current section as a checked
menuitemcheckbox in tertiary-container, which a screen reader announces as a
choice rather than where you are, and it dropped the sections' badges, so an
open support count showed on the tabs but not on a phone. <x-menu-item> gains
current (aria-current="page", the selected shape in secondary-container,
the navigation indicator's colour) and badge (a dot or a count at the end of
the row), and the picker uses both.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RHoXZSHc8gGpZjFmA5fPc2
