fix(admin): update aria-expanded and label when mobile menu is toggled

[Ferryx349]

Description

This PR updates aria-expanded (true / false) and dynamic aria-label (Open navigation / Close navigation) on #menu-toggle inside setNavOpen() so screen readers receive real-time navigation drawer state changes.

Related Issue

Closes:- #712.

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Non-functional change (docs, style, minor refactor)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my code changes.
• I added a changeset, or this is docs-only and I added an empty changeset.
• All new and existing tests passed.

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Latest commit: 4a39c70

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[Copilot]

Pull request overview

This PR improves admin dashboard accessibility and keyboard handling by updating ARIA attributes on the mobile navigation toggle and refining which keypresses trigger global shortcuts.

Changes:

• Update #menu-toggle to dynamically reflect drawer state via aria-expanded and a stateful aria-label in setNavOpen().
• Treat <select> elements as “typing targets” to avoid triggering global shortcuts while interacting with form controls.
• Ignore global shortcut handling when modifier keys (Meta/Ctrl/Alt) are pressed to prevent unintended actions (e.g., browser/system shortcuts).

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