Skip empty slug blog pages

src/pages/blog/[slug].astro

@@ -4,8 +4,10 @@ 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 },
+  return posts
+    .filter((post) => typeof post.slug === 'string' && post.slug.trim() !== '')
+    .map((post) => ({
+      params: { slug: post.slug },
       props: { post },
     }));
 }