fix(viewer): fix memory leak in cilent MD rendering

Solved by downgrading rehype-highlight.

Author: immccn123

packages/viewer/package.json

@@ -6,7 +6,8 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "inspect": "cross-env NODE_OPTIONS='$NODE_OPTIONS --inspect' next start"
   },
   "dependencies": {
     "@floating-ui/dom": "^1.5.3",
@@ -20,9 +21,9 @@
     "react-dom": "^18.2.0",
     "react-icons": "^4.11.0",
     "react-infinite-scroll-component": "^6.1.0",
-    "react-markdown": "^9.0.0",
-    "rehype-highlight": "^7.0.0",
-    "rehype-katex": "^7.0.0",
+    "react-markdown": "^8.0.0",
+    "rehype-highlight": "^6.0.0",
+    "rehype-katex": "^6.0.0",
     "remark-gfm": "^4.0.0",
     "remark-luogu-flavor": "^1.0.0",
     "remark-math": "^6.0.0",
@@ -38,6 +39,7 @@
     "@types/react": "^18.2.34",
     "@types/react-dom": "^18.2.14",
     "@typescript-eslint/eslint-plugin": "^6.9.1",
+    "cross-env": "^7.0.3",
     "eslint": "^8.53.0",
     "eslint-config-airbnb": "^19.0.4",
     "eslint-config-airbnb-typescript": "^17.1.0",