fix: lock nextjs at 15.2.1 since Twikoo conflict

Author: ZL-Asica

package.json

@@ -33,7 +33,7 @@
     "gray-matter": "^4.0.3",
     "katex": "^0.16.21",
     "lucide-react": "^0.479.0",
-    "next": "15.2.1",
+    "next": "15.2.0",
     "react": "19.0.0",
     "react-dom": "19.0.0",
     "react-icons": "^5.5.0",
@@ -72,6 +72,11 @@
     "tailwindcss": "^4.0.12",
     "typescript": "^5.8.2"
   },
+  "pnpm": {
+    "overrides": {
+      "next": "15.2.0"
+    }
+  },
   "lint-staged": {
     "src/**/*.{js,jsx,ts,tsx,json,yml}": [
       "eslint --fix"