Update blog images, remove deleted posts, and configure rotating featured post

app/blog/page.tsx

@@ -1,6 +1,5 @@
 import { Metadata } from 'next';
 import { HeroSection } from '@/components/sections/HeroSection';
-import { FeaturedPost } from '@/components/sections/FeaturedPost';
 import { PostsGrid } from '@/components/sections/PostsGrid';
 import { CtaBanner } from '@/components/sections/CtaBanner';
 import { getPosts, getFeaturedPost } from '@/content/posts';
@@ -13,6 +12,8 @@ export const metadata: Metadata = {
   }
 };
 
+export const revalidate = 86400; // Regenerate every 24 hours
+
 export default function BlogPage() {
   const allPosts = getPosts();
   const featuredPost = getFeaturedPost();
@@ -34,12 +35,7 @@ export default function BlogPage() {
       />
 
       <section className="py-16 md:py-24 max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
-        <div className="mb-16">
-          <h2 className="text-2xl font-bold text-primary font-heading mb-8">Artykuł wyróżniony</h2>
-          <FeaturedPost post={featuredPost} />
-        </div>
-
-        <PostsGrid posts={remainingPosts} />
+        <PostsGrid posts={remainingPosts} featuredPost={featuredPost} />
       </section>
 
       <CtaBanner