update to nuxt 4

app/middleware/require-user.global.ts

@@ -0,0 +1,27 @@
+const whitelistedPrefixes = ["/auth", "/api", "/setup"];
+const requireAdmin = ["/admin"];
+
+export default defineNuxtRouteMiddleware(async (to, _from) => {
+  if (import.meta.server) return;
+  const error = useError();
+  if (error.value !== undefined) return;
+  if (whitelistedPrefixes.findIndex((e) => to.fullPath.startsWith(e)) != -1)
+    return;
+
+  const user = useUser();
+  if (user === undefined) {
+    await updateUser();
+  }
+  if (!user.value) {
+    return navigateTo({
+      path: "/auth/signin",
+      query: { redirect: to.fullPath },
+    });
+  }
+  if (
+    requireAdmin.findIndex((e) => to.fullPath.startsWith(e)) != -1 &&
+    !user.value.admin
+  ) {
+    return navigateTo({ path: "/" });
+  }
+});