UI: Ensure FocusScope reuse across manager

[Sidnioulz]

What I did

Fixes a regression occurring today at the intersection of #36224 and a RAC update PR. Ensures that we have a single ReactAria FocusManager, using the new react-aria import path and not re-exporting it publicly.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

ø

Manual testing

• Run SB
• Notice no errors in dev server
• Make the viewport small enough to get the mobile UI
• Open navigation menu
• Tab to the cog icon opening the about menu
• Press Enter
• Tab around and notice coherent focus order

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Declare whether manual QA will be needed for this PR during the next release, through qa:needed or qa:skip

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

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📥 Commits

Reviewing files that changed from the base of the PR and between 75610fb and 7b97d62.

📒 Files selected for processing (1)

• code/.storybook/main.ts

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Walkthrough

FocusScope now comes directly from react-aria/FocusScope. Manager global exports, runtime registration, typings, and the production Vite alias expose the updated module reference.

Changes

FocusScope module ownership

Layer / File(s)	Summary
FocusScope source imports code/core/src/components/index.ts, code/core/src/manager/components/mobile/about/MobileAbout.tsx	Removes the public FocusScope re-export and imports FocusScope from react-aria/FocusScope.
FocusScope runtime wiring code/core/src/manager/globals/exports.ts, code/core/src/manager/globals/globals.ts, code/core/src/manager/globals/runtime.ts, code/core/src/manager/typings.d.ts	Adds the react-aria/FocusScope export and runtime mappings, including the __REACT_ARIA_FOCUS_SCOPE__ declaration.
Production module alias code/.storybook/main.ts	Aliases storybook/internal/components to the source components path for production Vite builds.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to 7b97d

The change aligns production module resolution with the updated FocusScope ownership, with no remaining merge-blocking risk identified.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

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