feat(ui): live host row update via SSE without full reload

On new ingest, patch visible host from GET /hosts/{id}; SAC 0.8.1.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/api.ts

@@ -214,6 +214,10 @@ export function fetchHost(id: number): Promise<HostDetail> {
   return apiFetch<HostDetail>(`/api/v1/hosts/${id}`);
 }
 
+export function fetchRecentEvents(limit = 1): Promise<EventSummary[]> {
+  return apiFetch<EventSummary[]>(`/api/v1/dashboards/recent-events?limit=${limit}`);
+}
+
 export interface HostListResponse {
   items: HostSummary[];
   total: number;