Each script launches and closes Chrome through scripts/qa/browser.mjs,
waits on the application through scripts/qa/ready.mjs instead of the
loading screen and fixed pauses, and reads the contract instead of
Cesium where the check is not about Cesium itself.
Compare declared visibility with the manager's effective intent, and treat
in-flight transitions as stale so a toggle or superseded LOAD rollback that
is still settling cannot slip past the check. Reconcile only those layers
inside the lightweight seek instead of rebuilding the shot, and report a
refusal without resetting the seek position or camera.
Co-Authored-By: Claude Opus 5.5 <[email protected]>