Revert "fix: rollback GA4 install code (#194)"

This reverts commit e275c03.

src/pages/_app.tsx

@@ -1,9 +1,11 @@
 import { Noto_Sans_SC, Rubik } from "next/font/google";
+import { GoogleAnalytics } from "@next/third-parties/google";
 
 import Layout from "@/components/layout";
 
 import "@/styles/globals.css";
 import type { AppProps } from "next/app";
+import { isEnableTrack } from "./_document";
 
 const notoSC = Noto_Sans_SC({
   weight: ["400", "500", "700"],
@@ -34,6 +36,7 @@ export default function App({ Component, pageProps }: AppProps) {
       >
         <Component {...pageProps} />
       </Layout>
+      {isEnableTrack && <GoogleAnalytics gaId="G-RBND7XQ43D" />}
     </>
   );
 }

src/pages/_document.tsx

@@ -1,4 +1,3 @@
-import { GoogleAnalytics } from "@next/third-parties/google";
 import { Html, Head, Main, NextScript } from "next/document";
 import Script from "next/script";
 
@@ -58,7 +57,6 @@ export default function Document() {
               `}
           </Script>
         )}
-        {isEnableTrack && <GoogleAnalytics gaId="G-RBND7XQ43D" />}
       </body>
     </Html>
   );