docs: state since which version each CSS transition property is routed to the platform

[MatiPl01]

Note

This pull request was authored by AI on behalf of @MatiPl01.

Summary

The "Properties routed to the platform" table in the feature flags guide was stale: it still showed backgroundColor, borderColor and borderRadius as not routed on Android after #10310, and gave no idea of which release routes what. Each cell now names the version since which the property is routed (iOS: opacity 4.4.0, the rest 4.5.0; Android: opacity 4.6.0, backgroundColor/borderColor/borderRadius/shadowColor 4.7.0), and the note below the table spells out the same per platform.

The shadowColor row for Android assumes #10547 lands in 4.7.0.

Test plan

Docs-only. remark leaves the file unchanged.

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📝 Walkthrough

Walkthrough

The feature flag guide replaces platform support markers with Reanimated version information for CSS property routing. It documents numeric-only routing for borderRadius, API 28+ routing for Android shadowColor, and loop execution for unsupported cases. It also updates routing details for opacity, backgroundColor, and borderColor.

Priority: ⬇️ Low

Change: Other

Merge Risk: ⚪ Minimal · up to f3fbd

This documentation-only change does not alter runtime behavior, and its routing claims are consistent with the cited implementation.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main documentation change: recording the version from which each CSS transition property is routed to the platform.
Description check	✅ Passed	The description directly explains the documentation updates, platform-specific versions, qualifiers, assumption about #10547, and documentation-only test plan.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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[coderabbitai]

⚠️ Outside the diff (1)

🟡 Minor · Keep borderWidth in the iOS routing documentation.

docs/docs-reanimated/docs/guides/feature-flags.md:173-178
🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

Keep borderWidth in the iOS routing documentation. When IOS_CSS_CORE_ANIMATION is enabled with an eligible easing, the iOS router includes borderWidth. If React Native rasterizes the border, its width can snap instead of animating. Keep borderWidth in the iOS table and limitation warning.

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• docs/docs-reanimated/docs/guides/feature-flags.md

Included review availability: Your plan provides up to 10 included reviews per hour; 7 remain after this review.