Link homework review entry points to pending filter

Dashboard tiles and the curator CTA pointed to /curator/homework without
a status filter, so the default all-submissions list (newest first)
buried old PENDING items pages deep — 19 June submissions sat unseen
for 6 weeks while the top of the list showed freshly approved work.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app/curator/dashboard/page.tsx

@@ -31,7 +31,7 @@ export default async function CuratorDashboard() {
       </div>
 
       {pending > 0 ? (
-        <Link href="/curator/homework" className="btn-aubade btn-aubade-accent inline-flex items-center gap-2 px-5 py-2.5 text-sm">
+        <Link href="/curator/homework?status=pending" className="btn-aubade btn-aubade-accent inline-flex items-center gap-2 px-5 py-2.5 text-sm">
           Перейти к проверке ({pending}) →
         </Link>
       ) : (