Enabled vercel analytics

package.json

@@ -21,6 +21,7 @@
     "@docusaurus/faster": "3.10.2",
     "@docusaurus/preset-classic": "3.10.2",
     "@mdx-js/react": "^3.0.0",
+    "@vercel/analytics": "^2.0.1",
     "clsx": "^2.0.0",
     "prism-react-renderer": "^2.3.0",
     "prismjs": "^1.30.0",

src/theme/Root.tsx

@@ -0,0 +1,23 @@
+import type {ReactNode} from 'react';
+import {Analytics} from '@vercel/analytics/react';
+
+// Docusaurus has no built-in Root component of its own to extend — this
+// file, once present under src/theme/, is picked up automatically and
+// wraps the entire app. That makes it the right place to mount
+// @vercel/analytics: it needs to render once, outside any page, and Root
+// is the only place Docusaurus guarantees is common to every route
+// (browser vs. server-rendered pages included).
+//
+// Vercel Web Analytics itself only reports anything once this site is
+// deployed on Vercel with Analytics turned on for the project (Vercel
+// dashboard → project → Analytics tab) — this component is inert
+// (no requests, no error) in local dev and in any other hosting
+// environment.
+export default function Root({children}: {children: ReactNode}): ReactNode {
+  return (
+    <>
+      {children}
+      <Analytics />
+    </>
+  );
+}