feat: ImageLightbox placeholder

src/shared/ui/ImageLightbox/index.ts

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+export { ImageLightbox } from './ui/ImageLightbox';

src/shared/ui/ImageLightbox/ui/ImageLightbox.tsx

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+'use client';
+
+type Props = {
+  /**
+   * Image source URL
+   */
+  src: string;
+  /**
+   * Image alt text, also used as the dialog accessible label
+   */
+  alt: string;
+  /**
+   * CSS classes forwarded to the thumbnail button wrapper
+   */
+  className?: string;
+};
+
+/**
+ * Clickable image thumbnail that opens a fullscreen brutalist dialog on click.
+ */
+export function ImageLightbox(_props: Props) {
+  return null;
+}