fix(notifications): Back to a row that folded away since opens Earlier on it

docs/DESIGN.md

@@ -381,7 +381,8 @@ Which actions are visible and which live in a menu.
   "…" holds find / undo for an activity notice. The notification center lists what asks for the
   reader first ("Needs you · n": an unread row, a notice waiting on an action — one read during the
   visit keeps its place there until Mark all read), then one stream of both sources, newest first,
-  and folds read rows older than a week under "Earlier (n)", a heading-style disclosure, closed. Its band keeps Mark all read
+  and folds read rows older than a week under "Earlier (n)", a heading-style disclosure, closed — Back to a row
+  that folded away since opens it on that row. Its band keeps Mark all read
   and puts Clear everything, now behind a confirm, in its "…"; the Scheduler's strip keeps Run all
   and Pause and puts Purge discovery in its "…". A list whose row objects are rebuilt each render or replaced by a
   poll passes `useContextMenu({ keyOf })` (its id), so the "…" still closes its own menu. A menu's