feat: Stage 4 — fail2ban connection and server status

frontend/src/api/dashboard.ts

@@ -0,0 +1,20 @@
+/**
+ * Dashboard API module.
+ *
+ * Wraps the `GET /api/dashboard/status` endpoint.
+ */
+
+import { get } from "./client";
+import { ENDPOINTS } from "./endpoints";
+import type { ServerStatusResponse } from "../types/server";
+
+/**
+ * Fetch the cached fail2ban server status from the backend.
+ *
+ * @returns The server status response containing ``online``, ``version``,
+ *   ``active_jails``, ``total_bans``, and ``total_failures``.
+ * @throws {ApiError} When the server returns a non-2xx status.
+ */
+export async function fetchServerStatus(): Promise<ServerStatusResponse> {
+  return get<ServerStatusResponse>(ENDPOINTS.dashboardStatus);
+}