feat: complete admin error handling improvements - add error display to articles pages

- Add error display to articles pages (overview, edit, new)
- Improve createArticle action to handle database errors gracefully
- Redirect with error query params for user feedback on failure
- Completes error handling improvements across admin pages
- Enhances error reporting for better user experience

src/app/admin/articles/new/page.tsx

@@ -2,13 +2,24 @@ import Link from "next/link";
 import { createArticle } from "@/actions/admin-articles";
 import { ArticleForm } from "@/components/admin/article-form";
 
-export default function NewArticle() {
+export default async function NewArticle({
+  searchParams,
+}: {
+  searchParams: Promise<{ error?: string }>;
+}) {
+  const { error } = await searchParams;
+
   return (
     <main>
       <p className="muted">
         <Link href="/admin/articles">← Articles</Link>
       </p>
       <h1>New article</h1>
+      {error ? (
+        <p className="muted" style={{ marginBottom: "1rem", color: "#dc2626" }}>
+          Error: {error}
+        </p>
+      ) : null}
       <ArticleForm action={createArticle} />
     </main>
   );