fix: Scope Wizard test utility findMenuNavigationLinks to sidebar navigation

[Who-is-PS]

Description

After the introduction of the expandable step navigation (#4200), findMenuNavigationLinks() returns double the expected number of links. Both the desktop sidebar and the mobile expandable navigation render navigation links with the same CSS class in the DOM. Since findAllByClassName searches the entire component tree, it picks up links from both navigations.

This scopes findMenuNavigationLinks() and findMenuNavigationLink() to only search within the sidebar <nav> element (.navigation class), restoring backward-compatible behavior.

Related links, issue #, if available: n/a

How has this been tested?

Review checklist

The following items are to be evaluated by the author(s) and the reviewer(s).

Correctness

• Changes include appropriate documentation updates.
• Changes are backward-compatible if not indicated, see CONTRIBUTING.md.
• Changes do not include unsupported browser features, see CONTRIBUTING.md.
• Changes were manually tested for accessibility, see accessibility guidelines.

Security

• If the code handles URLs: all URLs are validated through the checkSafeUrl function.

Testing

• Changes are covered with new/existing unit tests?
• Changes are covered with new/existing integration tests?

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.42%. Comparing base (5cfcc6d) to head (a63e247).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4286   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files         891      891           
  Lines       26098    26098           
  Branches     9435     9435           
=======================================
  Hits        25426    25426           
  Misses        629      629           
  Partials       43       43           

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[pan-kot]

The navigation is always present, right - including mobile viewport?

[Who-is-PS]

Yes, the sidebar <nav> with .navigation class is always in the DOM. It's never conditionally rendered. On small containers it's CSS-hidden (display: none) but still present, so findByClassName will always find it.