A performant image viewer with native off-thread decode (createImageBitmap), continuous scroll, zoom, rotate, fit-to-width, download, and a per-frame overlay slot. Renders multi-page TIFF scans efficiently: frames decode lazily near the viewport and decoded bitmaps are capped. No useEffect.
pnpm dlx shadcn@latest add "https://ui.retab.com/r/image-viewer.json"