fix(build): resolve next.js 15 generateStaticParams type/runtime error for nested dynamic segments

app/[locale]/referenzen/[slug]/page.tsx

@@ -38,10 +38,13 @@ export async function generateMetadata({ params }: PageProps): Promise<Metadata>
   };
 }
 
-export async function generateStaticParams({ params }: { params: { locale: string } }) {
-  const references = await getAllReferences(params.locale);
+export async function generateStaticParams(props: any) {
+  const params = await props.params;
+  const locale = params?.locale || 'de'; // fallback to 'de' if undefined
+  const references = await getAllReferences(locale);
   return references.map((ref) => ({
     slug: ref.slug,
+    locale
   }));
 }