完成留言管理功能
diff --git a/frontend/package.json b/frontend/package.json
index 02f68e2..f57cfa8 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -28,6 +28,7 @@
     "js-cookie": "2.2.0",
     "jsonlint": "1.6.3",
     "jszip": "3.2.1",
+    "moment": "^2.27.0",
     "normalize.css": "7.0.0",
     "nprogress": "0.2.0",
     "path-to-regexp": "2.4.0",