Add keyboard search and the empty, loading, and error states.

CONTENT-WP-0002-T05 focuses search with slash, clears it with Escape, and wraps the header on a narrow screen.

Assistant: grok
Assistant-Session: 01a1346c-fdff-7741-b1af-b7283661554b

ui/app/error.tsx

@@ -0,0 +1,11 @@
+"use client";
+
+export default function Error({ error, reset }: { error: Error & { digest?: string }; reset: () => void }) {
+  return (
+    <div className="mx-auto max-w-7xl px-4 py-14 sm:px-6" role="alert">
+      <h1 className="text-2xl">This page could not be loaded.</h1>
+      <p className="mt-3 max-w-2xl text-sm text-muted">{error.message || "Records could not be loaded."}</p>
+      <button type="button" className="btn mt-6" onClick={() => reset()}>Try again</button>
+    </div>
+  );
+}