fix: get access token from headers

app/[lang]/webview/test/page.tsx

@@ -1,14 +1,21 @@
+import { cookies, headers } from "next/headers"
+
+import { serverClient } from "@/lib/trpc/server"
+
 import type { Metadata } from "next"
 
 export const metadata: Metadata = {
   title: "Hello World from Webview",
 }
 
-export default function WebViewTestPage() {
+export default async function WebViewTestPage() {
+  const data = await serverClient().user.get()
+
   return (
     <main>
       <header>
         <h1>Hello From WebView Test Page!</h1>
+        <p>{data.firstName}</p>
       </header>
     </main>
   )