docs: add ACCESSIBILITY_AUDIT, SECURITY_PRIVACY_AUDIT, PRODUCT_BRIEF with file-specific actions; a11y: add skip link, lang+hreflang, ARIA for menu/carousel/dialog/form; noValidate+honeypot

src/components/Lightbox.jsx

@@ -21,7 +21,8 @@ export default function Lightbox({ images, currentIndex, onClose, onNext, onPrev
   if (!images || images.length === 0) return null;
 
   return (
-    <div className="fixed inset-0 z-[9999] bg-black bg-opacity-90 flex items-center justify-center p-4" onClick={onClose}>
+    <div className="fixed inset-0 z-[9999] bg-black bg-opacity-90 flex items-center justify-center p-4" onClick={onClose}
+         role="dialog" aria-modal="true" aria-label="Image viewer">
       <div className="relative max-w-5xl max-h-full" onClick={(e) => e.stopPropagation()}> {/* Prevent closing when clicking on image */}
         <img 
           src={images[currentIndex]}