feat: migrate Payload CMS to MDX and harden static infrastructure

app/[locale]/blog/[slug]/page.tsx

@@ -19,7 +19,7 @@ import { setRequestLocale } from 'next-intl/server';
 import BlogEngagementTracker from '@/components/analytics/BlogEngagementTracker';
 
 // Payload CMS Imports
-import PayloadRichText from '@/components/PayloadRichText';
+import MDXContent from '@/components/MDXContent';
 
 interface BlogPostProps {
   params: Promise<{
@@ -215,7 +215,7 @@ export default async function BlogPost({ params }: BlogPostProps) {
 
             {/* Main content with enhanced styling rendering Payload Lexical */}
             <div className="prose prose-lg md:prose-xl max-w-none prose-headings:font-bold prose-headings:text-text-primary prose-p:text-text-secondary prose-p:leading-relaxed prose-a:text-primary prose-a:no-underline hover:prose-a:underline prose-img:rounded-2xl prose-img:shadow-2xl prose-blockquote:border-primary prose-blockquote:bg-primary/5 prose-blockquote:rounded-r-2xl prose-strong:text-primary">
-              <PayloadRichText data={post.content} />
+              <MDXContent data={post.content} />
             </div>
 
             {/* Power CTA */}