feat: implement import functionality with tab navigation for receipts and invoices

frontend/app/import/page.tsx

@@ -0,0 +1,18 @@
+import { Metadata } from 'next';
+import ImportTabsClient from './ImportTabsClient';
+
+type Props = {
+  searchParams: Promise<{ tab?: string }>;
+};
+
+export async function generateMetadata({ searchParams }: Props): Promise<Metadata> {
+  const { tab } = await searchParams;
+  if (tab === 'recept') return { title: 'Importera recept' };
+  return { title: 'Importera kvitto' };
+}
+
+export default async function ImportPage({ searchParams }: Props) {
+  const { tab } = await searchParams;
+  const activeTab = tab === 'recept' ? 'recept' : 'kvitto';
+  return <ImportTabsClient activeTab={activeTab} />;
+}