Skip empty slug blog pages

src/pages/blog/[slug].astro

@@ -4,10 +4,12 @@ import { getBlogPostBySlug, getBlogPosts } from '../../utils/directus';
 
 export async function getStaticPaths() {
   const posts = await getBlogPosts();
-  return posts.map((post) => ({
-    params: { slug: Array.isArray(post.slug) ? post.slug[0] : post.slug },
-    props: { post },
-  }));
+  return posts
+    .filter((post) => typeof post.slug === 'string' && post.slug.trim() !== '')
+    .map((post) => ({
+      params: { slug: post.slug },
+      props: { post },
+    }));
 }
 
 const { post } = Astro.props;