docs: document CSS transition and animation callbacks

[MatiPl01]

Documents the lifecycle callbacks that CSS transitions and animations report, which had no page of their own.

Animation callbacks

Screen.Recording.2026-09-15.at.12.21.28.mp4

Transition callbacks

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• docs/docs-reanimated/docs/css-animations/animation-callbacks.mdx
• docs/docs-reanimated/docs/css-transitions/transition-callbacks.mdx

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• docs/docs-reanimated/docs/css-transitions/transition-callbacks.mdx

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📝 Walkthrough

Walkthrough

The PR documents CSS animation and transition callbacks. It adds four interactive examples and links the callback pages from existing overviews. It also updates Reanimated and Worklets versions in the documentation package manifests.

Changes

Layer / File(s)	Summary
Documentation runtime versions	The documentation packages update their Reanimated and Worklets dependencies.
Animation callback documentation and examples	Documents callback types, lifecycle events, elapsed-time behavior, cancellation, platform support, iteration tracking, and callback sequencing.
Transition callback documentation and examples	Documents callback types, lifecycle events, elapsed-time behavior, cancellation, platform support, completion status, and cancellation logging. Overview pages link to the callback documentation.

Priority: ⬇️ Low

Change: Other

Merge Risk: ⚪ Minimal · up to bab7d

The documentation packages already use stable compatible versions, and the callback documentation and examples match the released runtime.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Title check	✅ Passed	The title clearly and concisely describes the main changes: documentation for CSS transition and animation callbacks.
Description check	✅ Passed	The description directly relates to the changeset by stating that it documents lifecycle callbacks for CSS transitions and animations.

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Actionable comments posted: 1

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Inline comments:
In `@docs/docs-reanimated/docs/css-animations/overview.mdx`:
- Line 96: Update the link description near “Animation Callbacks” to mention
animation cancellation alongside starting, repeating, and ending, while
preserving the existing link target and wording structure.

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• yarn.lock is excluded by !**/yarn.lock, !**/*.lock

📒 Files selected for processing (10)

• docs/docs-reanimated/docs/css-animations/animation-callbacks.mdx
• docs/docs-reanimated/docs/css-animations/overview.mdx
• docs/docs-reanimated/docs/css-transitions/overview.mdx
• docs/docs-reanimated/docs/css-transitions/transition-callbacks.mdx
• docs/docs-reanimated/package.json
• docs/docs-reanimated/src/examples/css-animations/AnimationCallbacksBasic.tsx
• docs/docs-reanimated/src/examples/css-animations/AnimationCallbacksSequence.tsx
• docs/docs-reanimated/src/examples/css-transitions/TransitionCallbacksBasic.tsx
• docs/docs-reanimated/src/examples/css-transitions/TransitionCallbacksCancel.tsx
• docs/docs-worklets/package.json

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[MatiPl01]

Holding this until 4.6.0 stable is out. The docs packages currently point at a 4.6.0 nightly so the web examples have the callback props at runtime, and once the stable release lands we should set the library version here to 4.6.0 and merge then.