fix: #244 optimize polyfill

package.json

@@ -14,6 +14,7 @@
   "dependencies": {
     "@svgr/webpack": "^6.5.1",
     "@vercel/analytics": "^0.1.11",
+    "array.prototype.at": "^1.1.1",
     "emoji-picker-react": "^4.4.7",
     "eventsource-parser": "^0.1.0",
     "fuse.js": "^6.6.2",
@@ -39,7 +40,6 @@
     "@types/react-dom": "^18.0.11",
     "@types/react-katex": "^3.0.0",
     "@types/spark-md5": "^3.0.2",
-    "array.prototype.at": "^1.1.1",
     "cross-env": "^7.0.3",
     "eslint": "^8.36.0",
     "eslint-config-next": "13.2.3",