chore: 移除next-sitemap...

apps/frontend/package.json

@@ -6,8 +6,7 @@
     "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint",
-    "postbuild": "next-sitemap"
+    "lint": "next lint"
   },
   "dependencies": {
     "@radix-ui/react-alert-dialog": "^1.1.15",
@@ -42,7 +41,6 @@
     "input-otp": "^1.4.2",
     "lucide-react": "^0.503.0",
     "next": "15.3.1",
-    "next-sitemap": "^4.2.3",
     "next-themes": "^0.4.6",
     "pagination": "^0.4.6",
     "popover": "^2.4.1",