Live data refreshes (messageCount churn from session status publication,
workspace topology refreshes) replace the sessions/workspaces arrays and
the selected object with same-id copies, and each replacement re-scrolled
the selected row into view.
Replace the broad updated() scroll triggers with positive reveal triggers:
a different row becoming selected (first render included), the archived
reveal path, a restore moving the selected row from archived back to
current (same id, archived flag cleared), and section expansion. The
sessions/workspaces array triggers are removed, not guarded.
