feat：添加管理员登录

src/api/admin-ping.ts

@@ -0,0 +1,18 @@
+import { adminRequest, hasLotteryAdminApiBaseUrl } from "@/lib/admin-http";
+import type { AdminPingResponse } from "@/types/api/admin-ping";
+
+import { API_V1_PREFIX } from "@/api/paths";
+
+/** `GET /api/v1/admin/ping`（需 Bearer Token） */
+export async function getAdminPing(): Promise<AdminPingResponse | null> {
+  if (!hasLotteryAdminApiBaseUrl()) {
+    return null;
+  }
+  try {
+    return await adminRequest.get<AdminPingResponse>(
+      `${API_V1_PREFIX}/admin/ping`,
+    );
+  } catch {
+    return null;
+  }
+}