fix(blog): ensure target environment vars are parsed for accurate strict filtering in prod, and integrate face detection gravity for blog thumbnails

app/[locale]/blog/page.tsx

@@ -62,7 +62,7 @@ export default async function BlogIndex({ params }: BlogIndexProps) {
           {featuredPost && featuredPost.frontmatter.featuredImage && (
             <>
               <Image
-                src={featuredPost.frontmatter.featuredImage}
+                src={`${featuredPost.frontmatter.featuredImage}?gravity=obj:face`}
                 alt={featuredPost.frontmatter.title}
                 fill
                 className="absolute inset-0 w-full h-full object-cover scale-105 animate-slow-zoom opacity-40 md:opacity-60"
@@ -160,7 +160,7 @@ export default async function BlogIndex({ params }: BlogIndexProps) {
                     {post.frontmatter.featuredImage && (
                       <div className="relative h-48 md:h-72 overflow-hidden">
                         <Image
-                          src={post.frontmatter.featuredImage}
+                          src={`${post.frontmatter.featuredImage}?gravity=obj:face`}
                           alt={post.frontmatter.title}
                           fill
                           className="w-full h-full object-cover transition-transform duration-1000 group-hover:scale-110"