feat(lynx): add scale feedback

[junghyeonsu]

변경 사항

• Lynx Main Thread에서 Element.animate()로 실행되는 useScaleFeedback을 추가합니다.
• wrapper 없이 단일 child에 Self Scale을 적용하는 ScaleFeedback utility component를 공개합니다.
• utility가 child의 기존 Main Thread touch/layout handler와 callback·object ref를 덮어쓰지 않고 합성합니다.
• trigger와 target을 같은 요소에 적용하는 Self Scale, 서로 다른 요소에 적용하는 Content Scale을 지원합니다.
• ActionButton, Chip, Callout, Tabs에는 Self Scale을, Accordion, Checkbox, RadioGroup, Switch에는 Content Scale을 적용합니다.
• Rootage의 pressed-scale duration·easing으로 Main Thread용 runtime primitive를 생성합니다.
• GlobalProps.motion === "reduced"와 disabled 상태에서는 scale을 적용하지 않으며, 값이 없거나 알 수 없으면 기본 motion으로 fallback합니다.
• Lynx Scale Feedback 개념 문서와 실행 예제를 추가하고 최소 지원 기준을 Lynx Engine 3.9로 명시합니다.
• @seed-design/lynx-react, @seed-design/lynx-css minor changeset을 추가합니다.

PR Stack

• Base: this PR
• Next: feat(lynx): run pressed feedback on main thread #2141 — pressed color transition and PageBanner feedback parity

검증

• bun generate:all
• bun --filter @seed-design/lynx-react typecheck
• bun --filter @seed-design/lynx-react test --run — 247 tests passed
• bun --filter @seed-design/lynx-react build
• bun test:all

런타임 기준

• SEED가 보장하는 최소 버전은 Lynx Engine 3.9입니다.
• motion이 없는 호스트는 기본 motion을 유지하며, 정확히 "reduced"일 때만 scale을 비활성화합니다.
• 실제 PlayLynx 및 Karrot Alpha 3.9 host 검증은 seed-design-lynx #2에서 분리해 기록합니다.

참고

• 이 설계와 문서 초안은 LLM의 도움을 받아 작성하고 사람이 검토했습니다.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Team

Run ID: 784b31fa-104f-4c97-9057-86c3f7d4dccb

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[changeset-bot]

🦋 Changeset detected

Latest commit: 6f60f1d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@seed-design/lynx-react	Minor
@seed-design/lynx-css	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Alpha Preview (Stackflow SPA)

• Branch Preview URL: https://feat-lynx-scale-feedback.seed-design-stackflow-spa.pages.dev
• Preview URL: https://e61d4d00.seed-design-stackflow-spa.pages.dev
• Commit: 6f60f1d

[github-actions]

Alpha Preview (Storybook)

• Branch Preview URL: https://feat-lynx-scale-feedback.seed-design-storybook.pages.dev
• Preview URL: https://cf3e75cb.seed-design-storybook.pages.dev
• Commit: 6f60f1d

[github-actions]

Alpha Preview (Docs)

• Branch Preview URL: https://feat-lynx-scale-feedback.seed-design.pages.dev
• Preview URL: https://bdf79ddb.seed-design.pages.dev
• Commit: 6f60f1d