feat(frontend): sprint 2 — simulations UI + MITRE picker

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/pages/EngagementDetailPage.tsx

@@ -5,6 +5,7 @@ import { useEngagement } from '@/hooks/useEngagements';
 import { LoadingState } from '@/components/LoadingState';
 import { ErrorState } from '@/components/ErrorState';
 import { StatusBadge } from '@/components/StatusBadge';
+import { SimulationList } from '@/components/SimulationList';
 
 export function EngagementDetailPage(): JSX.Element {
   const { id } = useParams<{ id: string }>();
@@ -71,13 +72,8 @@ export function EngagementDetailPage(): JSX.Element {
         </div>
       </section>
 
-      {/* Sprint 2 placeholder per AC-4.9 */}
-      <section className="bg-ink text-ink-on rounded-xl p-xxl">
-        <h2 className="text-[32px] font-medium leading-none">Simulations</h2>
-        <p className="text-[16px] mt-sm text-steel">
-          Simulations à venir au Sprint 2 — tracking of red team tests and SOC detection coverage
-          will live here.
-        </p>
+      <section>
+        <SimulationList engagementId={eng.id} />
       </section>
     </div>
   );