First @media print support at all: page size/margins, navigation and
interactive chrome suppressed, break behaviour for headings, tables,
code blocks, figures and plugin blocks. The VS-NfD marking runs as
header AND footer on every sheet via a real-table PrintFrame whose
thead/tfoot browsers repeat per page — @page margin boxes are
unimplemented and position:fixed places unreliably in both engines
(verified empirically); on screen the table chain renders as plain
blocks, so nothing changes visually. Verified as PDF-from-browser in
Chromium 140 and Firefox 153 (2 markings on every page of a multi-page
document); the repeatable procedure is documented in
apps/web/e2e/README.md. Unclassified pages print without a marking.
Co-Authored-By: Claude Fable 5 (1M context) <noreply@anthropic.com>
