home-order follow-ups: fresh stamps for the blocked group, sort/display agreement, live Alt+N projection

Three follow-ups from the 1.19.0 review of the activity-ordered home screens:

- Hook events now ride the same debounced session state broadcast the
  working/idle handlers use. The blocked group ranks on lastActivityAt, and
  without this a permission prompt raised after page load kept ranking by
  whatever stamp the browser loaded with.

- A working row with no submit stamp now shows the lastActivityAt fallback
  its sort anchor already uses: a row must never be ranked by a number it
  does not display.

- Alt+digit resolves through the live-session projection the render paints
  (sessionOrder minus dead ids), so a stale id cannot shift every painted
  number off its target, web tabs included. New tests pin both surfaces to
  one shared order and the numbering to the live projection.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/web/routes/hook-event-routes.ts

@@ -148,6 +148,11 @@ export function registerHookEventRoutes(
       ...safeData,
       ...(approvalId && { approvalId }),
     });
+    // Full state ride-along, same shape as the working/idle handlers: the home
+    // screens rank the blocked group on lastActivityAt, and without this a
+    // permission prompt raised after page load kept ranking by whatever stamp
+    // the browser loaded with. Debounced, so a hook burst costs one broadcast.
+    ctx.broadcastSessionStateDebounced(sessionId);
 
     // Send push notifications for hook events
     ctx.sendPushNotifications(`hook:${event}`, {