Fix/toast timeout cleanup

[j2h30728]

Description

Fixes #3703

Issue Summary

The Toast component's internal close timer (closeTimerRef) is not cleared when the component unmounts. This causes ReferenceError: document is not defined errors in test environments.

Reproduction scenario:

1. Toast opens → Timer starts (e.g., auto-close after 5 seconds)
2. Test ends / Component unmounts after 3 seconds
3. Timer callback executes after remaining 2 seconds
4. handleClose tries to access document.activeElement
5. Error occurs because document doesn't exist in test environment

Solution

Added a cleanup effect in ToastImpl to clear closeTimerRef on unmount:

React.useEffect(() => {
  return () => {
    window.clearTimeout(closeTimerRef.current);
  };
}, []);

This follows the same pattern used in other Radix components:

• HoverCard (hover-card.tsx:89-94)
• NavigationMenu (navigation-menu.tsx:171-177)

Changes

File	Change
packages/react/toast/src/toast.tsx	Added cleanup effect to clear timer on unmount (+7 lines)
packages/react/toast/src/toast.test.tsx	Added tests for timer cleanup behavior (new file)

[changeset-bot]

🦋 Changeset detected

Latest commit: 4ca1268

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

This PR includes changesets to release 2 packages

Name	Type
@radix-ui/react-toast	Patch
radix-ui	Patch

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