feat: add fuzzy post search

app/posts/page.tsx

@@ -1,5 +1,5 @@
 import { getPosts } from '@/lib/posts'
-import { PostCard } from '@/components/blog/PostCard'
+import { PostSearch } from '@/components/blog/PostSearch'
 import Template from '../template'
 
 export const metadata = { title: 'Posts' }
@@ -13,14 +13,7 @@ export default async function PostsPage() {
       <h1 className="heading-xl text-ink mt-0 mb-12">
         Posts
       </h1>
-      <div className="space-y-12">
-        {posts.map((post) => (
-          <PostCard key={post.slug} {...post} />
-        ))}
-        {posts.length === 0 && (
-          <p className="text-ink-soft">No posts yet.</p>
-        )}
-      </div>
+      <PostSearch posts={posts} />
     </main>
     </Template>
   )