perf: finalize PageSpeed 100 and WCAG 2.1 AA stabilization

- Achieved 100/100 Accessibility score across sitemap (pa11y-ci 10/10 parity)
- Stabilized Performance score >= 94 by purging LCP-blocking CSS animations
- Fixed canonical/hreflang absolute URI mismatches for perfect SEO scores
- Silenced client-side telemetry/analytics console noise in CI environments
- Hardened sitemap generation with environment-aware baseUrl
- Refined contrast for Badge and VisualLinkPreview components (#14532d)

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

@@ -80,7 +80,7 @@ export default async function BlogPost({ params }: BlogPostProps) {
         <div className="relative w-full h-[70vh] min-h-[500px] overflow-hidden group">
           <div className="absolute inset-0 transition-transform duration-[3s] ease-out scale-110 group-hover:scale-100">
             <Image
-              src={post.frontmatter.featuredImage}
+              src={`${post.frontmatter.featuredImage}?gravity=obj:face`}
               alt={post.frontmatter.title}
               fill
               priority
@@ -101,10 +101,7 @@ export default async function BlogPost({ params }: BlogPostProps) {
                     </span>
                   </div>
                 )}
-                <Heading
-                  level={1}
-                  className="text-white mb-8 drop-shadow-2xl"
-                >
+                <Heading level={1} className="text-white mb-8 drop-shadow-2xl">
                   {post.frontmatter.title}
                 </Heading>
                 <div className="flex flex-wrap items-center gap-6 text-white/80 text-sm md:text-base font-medium">