chore: final build validation and cleanup

app/posts/[slug]/page.tsx

@@ -1,6 +1,6 @@
 import { notFound } from 'next/navigation'
 import { MDXRemote } from 'next-mdx-remote/rsc'
-import { useMDXComponents } from '@/mdx-components'
+import { getMDXComponents } from '@/mdx-components'
 import remarkMath from 'remark-math'
 import remarkGfm from 'remark-gfm'
 import smartypants from 'remark-smartypants'
@@ -64,7 +64,7 @@ export default async function PostPage({ params }: { params: Promise<{ slug: str
             <div className="prose prose-lg max-w-none">
               <MDXRemote
                 source={post.source}
-                components={useMDXComponents({})}
+                components={getMDXComponents({})}
                 options={{
                   mdxOptions: {
                     remarkPlugins: [smartypants, remarkMath, remarkGfm],