#949 fix translation length + repair localized /data/

Summary

• Instruct the edge translation worker to keep translations roughly the same length as the source (±30%) so UI layouts stay intact.
• Honor translate="no" and class="notranslate" when collecting HTML segments.
• Protect the Live Update product name and bump TRANSLATION_CACHE_VERSION so stale locale caches refresh.
• Fix /data/: bootstrap metrics live in an inline JSON script (not a huge attribute), and live metric regions are marked translate="no".
• Escape bootstrap JSON for script embeds (jsonForInlineScript) so </script> cannot break out of the tag.

Why /fr/data/ was broken

Localized /data/ pages were still serving the pre-#947 loading shell (spinner + empty tables, no bootstrap metrics). English already SSR-boots metrics. All locales (fr, de, es, …) were stuck on that stale translated HTML.

After deploy of web + translation worker, the cache version bump forces a fresh translation of the fixed English page.

Test plan

• bun run check in apps/translation-worker (parser tests include translate=no)
• jsonForInlineScript round-trips and blocks </script> breakouts
• Deploy translation worker, then hit /fr/data/ and confirm SSR tables + no loading shell
• Confirm chrome copy is translated, metric rows stay English/stable
• Spot-check that short nav/labels are not expanded into long sentences

  

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Summary by CodeRabbit

• New Features

  • Improved translation handling for excluded content, markup, attributes, and protected terms such as “Live Update.”
  • Added safeguards for translation length, with retries and source-text fallback when needed.
  • Improved loading and display of data metrics, charts, and tables.
  • Added clearer screen-reader status updates for dynamic data.

• Bug Fixes

  • Prevented dynamic data and marked content from being translated unintentionally.
  • Improved safe handling of metrics embedded in the data page.