feat: support math rendering with KaTeX

src/main.jsx

@@ -2,6 +2,7 @@ import React from 'react'
 import ReactDOM from 'react-dom/client'
 import App from './App.jsx'
 import './index.css'
+import 'katex/dist/katex.min.css'
 
 // Clean up stale service workers on app load to prevent caching issues after builds
 if ('serviceWorker' in navigator) {
@@ -18,4 +19,4 @@ ReactDOM.createRoot(document.getElementById('root')).render(
   <React.StrictMode>
     <App />
   </React.StrictMode>,
-)
+)