ActionMenu: Ensure uncontrolled ActionMenu is handled properly when fullscreen

[TylerJDev]

Closes https://github.com/github/primer/issues/6264

When open state is uncontrolled (i.e. open is not passed to ActionMenu by the consumer) and the menu is fullscreen, we do not check if the component is "open" via the internal state (via combinedOpenState). This ensures that both controlled and uncontrolled states are accounted for within the onClose conditional.

Changelog

New

Changed

• Adds both controlled/uncontrolled states to onClose conditional

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: dc7bf44

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

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

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

[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Or, apply the integration-tests: skipped manually label to skip these checks.

[Copilot]

Pull request overview

This PR fixes a bug where uncontrolled ActionMenu components were not properly retaining tab focus when displayed in fullscreen mode. The issue occurred because the onClose callback only checked the open prop to determine if the menu should stay open on tab gesture, but didn't account for the internal state when open was undefined (uncontrolled mode).

Key changes:

• Adds logic to determine the correct open status by checking if open is controlled or uncontrolled
• Updates the dependency array of the onClose callback to include combinedOpenState

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/react/src/ActionMenu/ActionMenu.tsx	Adds conditional logic to use either controlled open prop or internal combinedOpenState for determining if the menu should stay open on tab gesture in fullscreen mode, and updates the callback dependency array
.changeset/fast-pots-say.md	Adds changeset entry documenting the fix as a patch release

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/9618

[primer-integration]

🔬 github-ui Integration Test Results

Check	Status	Details
CI	✅ Passed	View run
Projects (Memex)	✅ Passed	View run
VRT	✅ Passed	View run

✨ All checks passed! Your integration PR is ready for review.

[francinelucca]

❤️