UNavigationMenu fails axe standards

Environment

Is this bug related to Nuxt or Vue?

Nuxt

Package

v4.x

Version

v4.4.6

Reproduction

<UNavigationMenu
  orientation="vertical"
  :items="[
    {
      label: 'Parent',
      to: '/parent',
      children: [{ label: 'Child', to: '/parent/child' }],
    },
  ]"
/>

leads to

aria-allowed-attr (critical)
  ARIA attribute is not allowed: aria-expanded="false"
  target: button > .ms-auto[data-slot="linkTrailing"]

Description

The trailing chevron in the parent is rendered as a span. Reka applies aria-expanded. Because the span has no role, this ARIA attribute is not valid.

Because the parent can act as a hyperlink, a suggested fix could be to render the parent link and the chevron as siblings:

<a href=/parent">Parent</a>
<button aria-expanded="..." aria-controls="...">
    <ChevronIcon />
</button>

Additional context

I have patched locally with item.type !== 'trigger' which works for my use-case (type: 'trigger') works ok, but won't work when type is not 'trigger', so the structural change mentioned above is probably needed

Logs

Start from the UNavigationMenu rendering shown in the reproduction and run the example with axe to confirm the aria-expanded violation on the trailing chevron. The work is done when the parent link and chevron control produce valid ARIA markup for both link and trigger item types, and the reported accessibility violation is resolved.