Align Patrol header recency labels

Patrol header metadata now uses the canonical recency label so the top row no longer falls back to a generic last-run prefix when the page distinguishes activity from full verification.

docs/release-control/v6/internal/subsystems/patrol-intelligence.md

@@ -146,6 +146,9 @@ The summary recency chip must follow the same governed scope distinction. When
 the latest completed activity was only a scoped run, the summary should label
 that timestamp as `Last activity` instead of `Last patrol`; `Last full patrol`
 belongs only to the most recent completed full Patrol run.
+That same recency contract also applies to the header metadata row. The top
+header must not revert to a generic `Last:` timestamp when the rest of Patrol
+is explicitly distinguishing activity from full verification recency.
 That summary surface must also avoid reintroducing a second compact assessment
 or verification layer beneath the primary card. Supporting metric strips
 belong to counts and outcomes such as active findings, critical findings,

frontend-modern/src/features/patrol/PatrolIntelligenceHeader.tsx

@@ -13,6 +13,7 @@ import { groupModelsByProvider } from '@/utils/patrolFormat';
 import { getAIQuickstartCreditsPresentation } from '@/utils/aiQuickstartPresentation';
 import { buildPatrolScheduleOptions } from '@/utils/aiPatrolSchedulePresentation';
 import { getPatrolRuntimePresentation } from '@/utils/patrolRuntimePresentation';
+import { getPatrolRecencyPresentation } from '@/utils/patrolSummaryPresentation';
 import type { PatrolIntelligenceState } from './usePatrolIntelligenceState';
 
 export function PatrolIntelligenceHeader(props: { state: PatrolIntelligenceState }) {
@@ -27,6 +28,12 @@ export function PatrolIntelligenceHeader(props: { state: PatrolIntelligenceState
   const runtimePresentation = createMemo(() =>
     getPatrolRuntimePresentation(state.runtimeState(), state.blockedReason()),
   );
+  const recency = createMemo(() =>
+    getPatrolRecencyPresentation({
+      runs: state.patrolRunHistory() ?? [],
+      lastPatrolAt: state.patrolStatus()?.last_patrol_at,
+    }),
+  );
   const showQuickstartStatus = createMemo(() => {
     const patrolStatus = state.patrolStatus();
     if (!patrolStatus) return false;
@@ -61,11 +68,11 @@ export function PatrolIntelligenceHeader(props: { state: PatrolIntelligenceState
         class="mb-3"
         actions={
           <div class="flex flex-wrap items-center justify-end gap-3">
-            <Show when={state.patrolStatus()?.last_patrol_at}>
+            <Show when={recency().timestamp}>
               <div class="hidden sm:flex items-center gap-3 text-xs text-muted">
                 <span>
-                  Last:{' '}
-                  {formatRelativeTime(state.patrolStatus()?.last_patrol_at, {
+                  {recency().label}:{' '}
+                  {formatRelativeTime(recency().timestamp, {
                     compact: true,
                     emptyText: 'Never',
                   })}

frontend-modern/src/pages/__tests__/AIIntelligence.test.tsx

@@ -817,12 +817,13 @@ describe('AIIntelligence entitlement gating', () => {
     await waitFor(() => {
       expect(screen.getAllByText('Coverage incomplete').length).toBeGreaterThan(0);
       expect(screen.getByText('No recent full patrol')).toBeInTheDocument();
-      expect(screen.getByText(/Last activity/i)).toBeInTheDocument();
+      expect(screen.getAllByText(/Last activity/i).length).toBeGreaterThan(0);
       expect(screen.getByText('Warnings')).toBeInTheDocument();
     });
 
     expect(screen.queryByText('No issues found')).not.toBeInTheDocument();
     expect(screen.queryByText(/Last patrol/i)).not.toBeInTheDocument();
+    expect(screen.queryByText(/^Last:/i)).not.toBeInTheDocument();
     expect(screen.queryByText('Partial verification')).not.toBeInTheDocument();
     expect(
       screen.getAllByText(