Menu-button pattern: a trigger toggles a role="menu" of role="menuitem"
children with full arrow/Home/End/typeahead navigation, Escape + outside
click to dismiss, and ARIA expanded/haspopup wiring. Open state is
observable through onOpenChange/hl:open-change and controllable through
the returned API; activating an item emits a cancelable hl:select.
Menu-button pattern: a trigger toggles a
role="menu"ofrole="menuitem"children with full arrow/Home/End/typeahead navigation, Escape + outside click to dismiss, and ARIA expanded/haspopup wiring. Open state is observable throughonOpenChange/hl:open-changeand controllable through the returned API; activating an item emits a cancelablehl:select.