feat(ActionBar): customizable overflow menu label

[harshbhonsle]

Closes: #7437

Changelog

New

• Added overflowLabel prop to ActionBarProps with default "More items".
• Storybook updated to expose overflowLabel as a control.

Changed

• Overflow menu button aria-label now uses overflowLabel instead of hardcoded "More {ariaLabel} items".

Removed

• None

Rollout strategy

• Patch release

Testing & Reviewing

• Verified manually in Storybook:
  • Default shows "More items".
  • Custom values (e.g. "More actions") update correctly.
• Could not locate an existing test file for ActionBar under src/__tests__. Fix validated through Storybook preview.

Merge checklist

• Added/updated tests (none found for ActionBar, validated manually)
• Added/updated documentation (Storybook)
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge

[changeset-bot]

⚠️ No Changeset found

Latest commit: c09ad9a

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[TylerJDev]

Overall looks great! Just left one request, let me know if you have questions. Thank you for the PR too! ✨

[TylerJDev]

Could we rely on the spread ({...args} line 32) to pass the overflowLabel to the story? This way we don't need to create the object entirely.

Let me know if that makes sense, or if you have questions!

Suggested change

	render: ({'aria-labelledby': _, overflowLabel, ...args}) => (
	render: ({'aria-labelledby': _, overflowLabel, ...args}) => (

[TylerJDev]

Also, can we add a changeset of minor (as we're adding a new prop here). You can refer to this guide on adding a changeset: https://github.com/primer/react/blob/main/contributor-docs/CONTRIBUTING.md#adding-changeset-to-your-pull-request or run npx changeset.

In addition, you might need to run npm run format, as I see there's a CI failure for formatting. Let me know if you have any questions!