feat: 添加 moment-timezone 依赖，更新许可证过期时间逻辑为中国时区，优化日期处理

server/package-lock.json

@@ -13,6 +13,7 @@
         "dotenv": "^16.3.1",
         "express": "^4.18.2",
         "moment": "^2.29.4",
+        "moment-timezone": "^0.5.46",
         "mongoose": "^8.0.3"
       },
       "devDependencies": {
@@ -797,6 +798,17 @@
         "node": "*"
       }
     },
+    "node_modules/moment-timezone": {
+      "version": "0.5.46",
+      "resolved": "https://registry.npmmirror.com/moment-timezone/-/moment-timezone-0.5.46.tgz",
+      "integrity": "sha512-ZXm9b36esbe7OmdABqIWJuBBiLLwAjrN7CE+7sYdCCx82Nabt1wHDj8TVseS59QIlfFPbOoiBPm6ca9BioG4hw==",
+      "dependencies": {
+        "moment": "^2.29.4"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/mongodb": {
       "version": "6.12.0",
       "resolved": "https://registry.npmmirror.com/mongodb/-/mongodb-6.12.0.tgz",