Three gaps in the notice from the previous commit, found in review.
A page served from the network and claimed later by its own build's
worker counted as already taken over, so Reload went to that worker,
got the old build again and spent the session's reload: no notice and
no new build until the next start. Only a worker that replaced the one
that served the page skips the handover now, as at launch.
A reload that came before the new worker could take over (a slow
precache, a failed update, an install gone redundant) also spent that
guard, so the launch behind it could no longer finish the handover with
its own reload. That reload leaves the guard alone now.
An install whose server never reports the bundle's version (a hand-set
APP_VERSION) showed the notice in every session, and Reload could not
clear it. The store keeps the first version a page hears of, from the
app config at launch, and the notice only asks when a later report
differs: a different build at launch is the launch handover's to fix.
The server's wire-envelope test pins the welcome frame's fields and now
expects the version beside the socket id. The wiki's update page says
what an open tab shows after an update.
A tab kept open across a deploy ran the previous build until its next
start. The server now names its version in the realtime welcome frame,
which every open client reads again when it reconnects after the
restart a deploy brings. When that version is not the build the page
runs, a notice offers to reload. The reload goes through the same
service worker handover a launch uses: it waits for the new worker to
take over, or for a short timeout, and records the version only when
the takeover happened.
The notice reads the error boundary's texts for the same situation, so
every language has it already. It is one component for both shells,
sits above the offline pill, stays away offline and after a reload for
that version that did not bring it, and can be closed for the session.
Maurice