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Eleven dialogs passed a `label` that never reached the accessibility
tree: Web Awesome renders it into an <h2 id="title"> in the same shadow
root as the native <dialog> and never points aria-labelledby at it, so
getByRole('dialog', {name}) matched nothing and a screen reader
announced an unnamed dialog. a11y.md lists all of them under "what is
already correct".
utils/name-dialog.ts sets the IDREF, with aria-label as the fallback for
without-header (first-run-wizard), called from each host's updated().
aria-labelledby rather than aria-label because three call sites compute
their label at render time, and the heading re-renders anyway. It waits
for the dialog's own first update: wa-dialog populates its shadow root
in its own update, so a query at the host's firstUpdated names nothing.
Reaching into another library's open shadow root is deliberate and the
failure is bounded — if the structure moves, the query misses and the
dialog is as unnamed as it was.