Make geometry, input and observers read the latest published layout without
cold-start or invalidation-triggered layout. Only screenshot, screencast and
PDF output can build and publish a new tree.
Connect WebDriver page screenshots to the shared output pipeline, explain how
to initialize layout in errors, and migrate fixtures to explicit publication.
Remove obsolete read policies and embedded-frame completeness metadata.
Coalescing consecutive History API requests discarded intermediate
same-document traversals and their events when joint traversal plans
entered the shared queue. Keep these requests in order and derive the next
index from the last queued step, while retaining Navigation API promise
reuse.
Apply top-level traversals to the page's default Window when an isolated
realm initiated the request. Add local back/forward coverage across same-
and cross-document entries, and verify every event and microtask turn in
the existing history tests and fixture.
Fixes: f8f46bf48 (fix(history): coordinate complete joint traversal plans)
ldm0