feat: add Google Analytics integration component using Next.js Script

components/google-analytics.tsx

@@ -0,0 +1,24 @@
+import Script from "next/script";
+
+const GA_ID = process.env.NEXT_PUBLIC_GA_ID;
+
+export function GoogleAnalytics() {
+  if (!GA_ID) return null;
+
+  return (
+    <>
+      <Script
+        src={`https://www.googletagmanager.com/gtag/js?id=${GA_ID}`}
+        strategy="afterInteractive"
+      />
+      <Script id="google-analytics" strategy="afterInteractive">
+        {`
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+          gtag('config', '${GA_ID}');
+        `}
+      </Script>
+    </>
+  );
+}