folder support

src/app/api/posts/[slug]/route.ts

@@ -37,12 +37,15 @@ async function getPostBySlug(slug: string) {
 
 export async function GET(
   request: Request,
-  { params }: { params: { slug: string } }
+  { params }: { params: { slug: string[] | string } }
 ) {
   try {
-    const post = await getPostBySlug(params.slug);
+    // Support catch-all route: slug can be string or string[]
+    const slugArr = Array.isArray(params.slug) ? params.slug : [params.slug];
+    const slugPath = slugArr.join('/');
+    const post = await getPostBySlug(slugPath);
     return NextResponse.json(post);
   } catch (error) {
-    return NextResponse.json({ error: 'Failed to fetch post' }, { status: 500 });
+    return NextResponse.json({ error: 'Fehler beim Laden des Beitrags' }, { status: 500 });
   }
 }