Tabs root — coordinates and-tabs-list > and-tabs-trigger and
and-tabs-content children via shared headless logic, injected into each child
automatically. Arrow keys, Home/End, and roving tabindex are handled for you.
Note: `packages/web-components/src/components/and-tabs/readme.md` currently
documents `and-tabs-trigger`, not the `and-tabs` root — see the note on the
[Accordion](/components/accordion/) page for why. The root's table above
comes from `and-tabs.tsx` directly.