[navigation-menu] Close parent menus when nested link with closeOnClick is clicked

[CiscoFran10]

Closes #4262

• I have followed (at least) the PR section of the contributing guide.

Previously, when a nested link with closeOnClick was clicked, only the nearest NavigationMenu.Root closed and the parent menu stayed open. We now bubble that close up so the whole menu closes without needing to control the root with value / onValueChange.

Changes

• NavigationMenuRoot.tsx: Nested roots get the parent via useNavigationMenuRootContext(true). In setValue, after updating local state, if we're closing with eventDetails.reason === REASONS.linkPress, we call parentRootContext.setValue(null, eventDetails) so the parent (and its ancestors) close as well.
• NavigationMenuRoot.test.tsx: Added two fixtures, one with a single nested level and optional onValueChange, one with three nested levels and three tests under "nested menus": parent closes when nested link is clicked, parent onValueChange is called with null, and all three levels close when the deepest link is clicked.

[pkg-pr-new]

• base-ui-tanstack-start

• vite-css-base-ui-example

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/react@4276
  

  pnpm add https://pkg.pr.new/mui/base-ui/@base-ui/utils@4276
  

commit: f771eec

[mui-bot]

Bundle size report

Bundle	Parsed size	Gzip size
@base-ui/react	🔺+65B(+0.01%)	🔺+14B(+0.01%)

Details of bundle changes

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[atomiks]

Codex Review

Overview

This patch makes closeOnClick links inside nested navigation menus close the parent menus as well, and it adds regression coverage for nested and deeply nested cases. The branch now includes the current master, so this review reflects the full PR diff on top of the latest base.

Findings (None)

No blocking issues found in this patch.

Confidence: 4/5

High confidence based on a full pass over packages/react/src/navigation-menu/root/NavigationMenuRoot.tsx and packages/react/src/navigation-menu/root/NavigationMenuRoot.test.tsx, plus targeted NavigationMenuRoot runs in JSDOM and Chromium after merging the latest master.

Notes

• Verified with pnpm test:jsdom NavigationMenuRoot --no-watch.
• Verified with pnpm test:chromium NavigationMenuRoot --no-watch.