Bot canonical chats open as workspace tiles (workspaceMode: 'bots') and
are deliberately hidden from $sessions/$messagingSessions, so the
sessions.changed transcript refresh skipped them twice over: it covers
only the main pane's selection, and its resolveSession() bails on hidden
sessions. A background delivery (bot-to-bot DM via bot_relay.deliver, a
cron run's output, another machine) therefore never reached an open bot
chat — the roster updated but the pane stayed stale until remount
(#93942 scenario A).
Fix: the sessions.changed tick now also reconciles every visible
workspace tile through a dedicated signature-gated path. Each tile
carries its own stored↔runtime id pair so no resolution step is needed;
per-tile signatures make no-change ticks free; busy tiles are skipped
(their own stream owns the view); closed/superseded tiles discard their
in-flight read.
Slice 1 of 2 for #93942 (scenario A only). Scenario B (stream re-key
after mid-conversation model switch) follows separately.
Fixes part of #93942
beplee