A suspended tab's retry timer could run before it was shown again: touch()
recreated the record another tab had removed when it adopted the page's
writes, so the page sent them again over newer edits. The facade now
treats a page whose record is gone as superseded: the queue sends nothing
(maySend hook), its journal and record are not written again, and the
retry timer reloads it like a page shown again.
A re-read answered after another tab saved an entry no longer writes the
older answer over the shared cache: entries changed while the read
travelled are kept, with an unknown tag, so the next write here
conflicts and replays instead of removing what the other tab saved.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
