feat(release): publish minimal self-contained Magent source

frontend/app/not-found.tsx

@@ -0,0 +1,13 @@
+import Link from "next/link";
+import PageHeading from "./ui/PageHeading";
+
+export default function NotFound() {
+  return (
+    <main className="card">
+      <PageHeading title="Page not found" description="This link may have moved or no longer be available." />
+      <p>
+        <Link href="/">← Back to my requests</Link>
+      </p>
+    </main>
+  );
+}