ClassificationBanner renders the fixed ADR-0022 wording above and below
the content in reading view, editor and public page view; unclassified
pages show nothing. Announced to assistive tech via a localized hidden
prefix (de+en); styled from the plain text token only, so contrast holds
in both themes and under every accent with no new color pair. Public
content endpoint now carries the classification. New seed fixture
classified-note; a11y pack asserts banner top+bottom and axe-clean in
light and dark.
Co-Authored-By: Claude Fable 5 (1M context) <noreply@anthropic.com>
