fix: FunctionSignature return type border

[canerakdas]

Description

The bordered wrapper component should not be rendered in the FunctionSignature component when only the return type is present.

Ref: https://openjs-foundation.slack.com/archives/CVAMEJ4UV/p1785348769820369

Validation

The FunctionSignature "Return Type" variant should now be fixed in Chromatic, and the other variants shouldn't have any regressions.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
nodejs-org	Ready	Preview	Jul 30, 2026 4:24pm

[cursor]

PR Summary

Low Risk
Scoped presentation change in Signature CSS with no API or data-handling impact; :has() is widely supported in target browsers.

Overview
FunctionSignature (and other signature layouts) no longer show a bordered, padded box when the root contains only a return-type row.

SignatureItem now exposes data-kind on its wrapper so SignatureRoot can use :has(> [data-kind='return']:only-child) to drop border and horizontal/vertical padding in that case. Multi-parameter signatures keep the existing framed look.

@node-core/ui-components is bumped to 1.7.4.

^{Reviewed by Cursor Bugbot for commit 2de503a. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.09%. Comparing base (eab3644) to head (2de503a).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9050      +/-   ##
==========================================
- Coverage   75.15%   75.09%   -0.06%     
==========================================
  Files         102      102              
  Lines        9124     9124              
  Branches      374      375       +1     
==========================================
- Hits         6857     6852       -5     
- Misses       2263     2268       +5     
  Partials        4        4              

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[Copilot]

Pull request overview

This PR adjusts the Signature UI so that when a signature contains only a return-type item, the usual bordered/padded wrapper styling is removed—addressing the “Return Type” variant visual issue reported for FunctionSignature.

Changes:

• Add a data-kind attribute to SignatureItem to enable cross-module styling based on item kind.
• Update SignatureRoot styles to remove border and padding when its only direct child is a return item.
• Bump @node-core/ui-components version to 1.7.4.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/ui-components/src/Common/Signature/SignatureRoot/index.module.css	Removes border/padding from the root wrapper when it contains only a return item.
packages/ui-components/src/Common/Signature/SignatureItem/index.tsx	Adds data-kind hook used by SignatureRoot to detect a return-only signature.
packages/ui-components/package.json	Version bump for publishing the UI change.

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[github-actions]

📦 Build Size Comparison

Summary

Metric	Value
Old Total First Load JS	10.77 MB
New Total First Load JS	10.77 MB
Delta	0 B (0.00%)