feat: use WebP original for full-screen product image viewer

client/src/shared/lib/get-original-webp-url.ts

@@ -0,0 +1,14 @@
+/** Extract UUID and subdir from a /uploads/... URL */
+function parseUploadUrl(src: string): { uuid: string; ext: string; subdir: string } | null {
+  const match = src.match(/^\/uploads(?:\/(reviews))?\/([^.\\/]+)\.(png|jpe?g|webp)/i)
+  if (!match) return null
+  return { subdir: match[1] || '', uuid: match[2], ext: match[3].toLowerCase() }
+}
+
+/** Get the original WebP URL for full-screen display (no resize) */
+export function getOriginalWebpUrl(src: string): string {
+  const parsed = parseUploadUrl(src)
+  if (!parsed) return src
+  const pathPrefix = parsed.subdir ? `${parsed.subdir}/` : ''
+  return `/uploads/${pathPrefix}${parsed.uuid}.webp`
+}