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/services/api.js

@@ -441,4 +441,20 @@ export const matchingAPI = {
   },
 };
 
+// Admin API (matching control)
+export const adminAPI = {
+  async runMatchingNow(slug) {
+    const data = await fetchAPI(`/admin/events/${slug}/run-now`, {
+      method: 'POST',
+    });
+    return data.data;
+  },
+
+  async getMatchingRuns(slug, limit = 20) {
+    const params = new URLSearchParams({ limit: String(limit) });
+    const data = await fetchAPI(`/admin/events/${slug}/matching-runs?${params.toString()}`);
+    return data;
+  },
+};
+
 export { ApiError };