feat(frontend): add Run now button and matching runs list on event details page

- New adminAPI for run-now and runs listing
- MatchingRunsSection with refresh and run controls
- Integrate into EventDetailsPage under matching configuration

frontend/src/pages/EventDetailsPage.jsx

@@ -7,6 +7,7 @@ import QRCodeSection from '../components/events/QRCodeSection';
 import ParticipantsSection from '../components/events/ParticipantsSection';
 import MatchingConfigSection from '../components/events/MatchingConfigSection';
 import ScheduleConfigSection from '../components/events/ScheduleConfigSection';
+import MatchingRunsSection from '../components/events/MatchingRunsSection';
 
 export default function EventDetailsPage() {
   const { slug } = useParams();
@@ -105,6 +106,11 @@ export default function EventDetailsPage() {
           <MatchingConfigSection slug={slug} event={event} onRefresh={fetchEventDetails} />
         </div>
 
+        {/* Matching Runs (admin tools) */}
+        <div className="mt-6">
+          <MatchingRunsSection slug={slug} />
+        </div>
+
         {/* Schedule Configuration */}
         <div className="mt-6">
           <ScheduleConfigSection slug={slug} event={event} onRefresh={fetchEventDetails} />