fix: styles for markdown

frontend/package.json

@@ -11,10 +11,12 @@
   },
   "dependencies": {
     "@tailwindcss/vite": "^4.1.18",
+    "prismjs": "^1.30.0",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
     "react-markdown": "^10.1.0",
     "react-router-dom": "^7.13.0",
+    "react-syntax-highlighter": "^16.1.0",
     "rehype-raw": "^7.0.0",
     "remark-gfm": "^4.0.1",
     "tailwindcss": "^4.1.18"
@@ -24,6 +26,7 @@
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@types/react-syntax-highlighter": "^15.5.13",
     "@vitejs/plugin-react": "^5.1.1",
     "daisyui": "^5.5.14",
     "eslint": "^9.39.1",