Main now has #1282, which pauses periodic layer polling in a hidden page
with its own catch-up and listener cleanup, so this PR drops its duplicate
lifecycle.js change and test in favor of main's.
Review fixes:
- data.js passes panelAwareVisibility(document) (new in app/embed.js) as
the lifecycle's visibility target, so an inline panel whose host reports
it hidden keeps polling. The HUD's 250 ms readout follows the same
document.hidden && !isEmbeddedInline() rule as tools.js.
- Tests: embed.test.mjs (layers poll in an inline panel reported hidden,
pause without the flag) and hudPageVisibility.test.mjs (HUD readout).
Both use mock timers and clean up in finally.
- changelog.d/1344-inline-panel-visibility.md and a note in
docs/CURRENT-STATE.md.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
