fix(react-nav): only display actions on hover

[marcosmoura]

Previous Behavior

Nav split items were always displayed

New Behavior

Now only display split items on hover

[github-actions[bot]]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: entire library	1.27 MB 319.978 kB	1.271 MB 320.332 kB	1.299 kB 354 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	69.779 kB 20.273 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	227.642 kB 65.909 kB
react-components react-components: FluentProvider & webLightTheme	44.613 kB 14.641 kB
react-portal-compat PortalCompatProvider	8.386 kB 2.624 kB
react-timepicker-compat TimePicker	110.646 kB 36.578 kB

_{🤖 This report was generated against e24afbfb37d1b0be8275e4075752a622326273ba}

[github-actions[bot]]

Pull request demo site: URL

[marcosmoura]

How the keyboard navigation should work for actions that are displayed only on hover? Right now they are focusable, but not visible:

Screen.Recording.2025-06-12.at.14.22.55.mov

This was overlooked. Thank for catching this. Fixed on the latest commits