A page that omits a message attribute (a translation that drops one, or a
page without the shared footer) must not show empty or "undefined" text:
- Copy buttons still copy without #copy-status or its messages, keep their
own label and leave the status empty.
- The star label is skipped when the header has no label for the count.
- The percent demo, dinosaur game and speed check leave the current text in
place for a missing message; an unknown {placeholder} stays literal.
scripts/test-website-scripts.mjs runs main.js, home.js and dino-demo.js
against a small document model with node:test. `website.py check` runs it,
so the website CI job and the publisher's preparation job now set up the
repository's Node.js version.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
