Deduplicate admin review product images

HANDOFF.md

@@ -26,7 +26,31 @@ Latest TypeScript verification after the validation/upload changes:
 npx tsc --noEmit
 ```
 
-## Latest Codex Changes After `2cfff02`
+## Latest Codex Changes After `4e28ccd`
+
+### Admin review image dedupe
+
+File:
+- `src/app/admin/review/[productId]/page.tsx`
+
+Behavior:
+- Admin product review now deduplicates product images before rendering.
+- The dedupe applies to both:
+  - update compare section (`Gambar Produk`)
+  - normal admin review gallery (`Galeri`)
+- Root `imageId` / `image` and entries inside `productImages` are merged and sorted by `sequence`.
+- Duplicate images are removed by `imageId`, with URL as a fallback key.
+- This prevents the main image from appearing twice when backend sends it both as root `imageId` and inside `productImages`.
+
+Verification:
+
+```bash
+npm run build
+```
+
+The local production server was restarted on `http://localhost:3000` for manual admin review testing.
+
+## Previous Codex Changes After `2cfff02`
 
 ### Product edit image payload preservation