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Oleg Isonen db3b11970f fix: Optimize images in Markdown Embed (#6089)
## Summary

Markdown Embed now renders image tags with the same optimized attributes
and canvas behavior as the SDK Image component.

The implementation shares the complete attribute-resolution path without
rendering React inside the Markdown pipeline:

- `@webstudio-is/image` exposes one framework-independent
`getImageAttributes` function for optimization, placeholder fallback,
loading, decoding, dimensions, alternative text, and responsive sources.
- React-only element props such as `className`, `style`, handlers,
context, and refs stay in React callers.
- The SDK Image component and Markdown renderer both use
`getSdkImageProps` for canvas-specific loading, decoding, asset
identity, and incomplete-upload handling.
- Markdown retains only the necessary HTML attribute-name conversion,
sanitization, and Safari-safe `sizes` / `srcset` / `src` ordering.
- The redundant low-level React Image primitive was removed. Its callers
now render native `img` elements, and the image package no longer has
React runtime or peer dependencies.

## Compatibility and tradeoffs

- The SDK Image component remains the public React component because it
owns React context and ref forwarding.
- The removed low-level `@webstudio-is/image` Image export is replaced
by the pure attribute function for internal callers.
- No data migration or schema change is required.
- Loader output is sanitized after transformation, while unsafe input
URLs are sanitized before reaching the loader.

## Todo

- [x] Share image attribute resolution between native, SDK, and Markdown
images.
- [x] Preserve SDK canvas behavior for Markdown images.
- [x] Preserve safe URL sanitization and Safari-safe responsive
attribute ordering.
- [x] Remove the redundant low-level React image primitive and migrate
its callers.
- [x] Remove the overlapping `getImageProps` abstraction.
- [x] Add regression coverage comparing Markdown, SDK Image, and native
attribute output.
- [x] Review documentation impact and update the Markdown Embed
documentation.
- [x] Run targeted tests, typechecks, builds, lint, formatting,
package-boundary checks, and fixture generation.

## Verification

- `pnpm --filter @webstudio-is/image test`
- `pnpm --filter @webstudio-is/image typecheck`
- `pnpm --filter @webstudio-is/image build`
- `pnpm --filter @webstudio-is/image dts`
- `pnpm --filter @webstudio-is/sdk-components-react test`
- `pnpm --filter @webstudio-is/sdk-components-react typecheck`
- `pnpm --filter @webstudio-is/sdk-components-react build`
- `pnpm --filter @webstudio-is/sdk-components-react dts`
- `pnpm --filter @webstudio-is/builder typecheck`
- `pnpm --filter @webstudio-is/design-system typecheck`
- Targeted Oxlint and Oxfmt checks
- `pnpm check:package-boundaries`
- `pnpm fixtures` (no fixture diff)

Ref #6014
2026-08-10 18:21:45 +02:00
..
2022-11-25 12:27:44 +04:00