Add comments explaining dual close button implementation

[liuliu-dev]

Closes #6352

Adds code comments to explain why SelectPanel has two close button implementations and when each is used.

Changelog

New

Changed

Removed

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; This PR only adds comments for documentation purposes and does not change any functionality.

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 841cd45

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[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github depends on. If you are GitHub staff, we recommend testing these changes with github/github using the integration workflow. Thanks!

[github-actions]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	92.21 KB (0%)
packages/react/dist/browser.umd.js	92.39 KB (0%)

[Copilot]

Pull Request Overview

This PR adds explanatory comments to the SelectPanel component to document why there are two different close button implementations. The changes address issue #6352 by clarifying the dual close button approach used for different responsive behaviors.

• Adds detailed multi-line comment explaining the two close button implementations in SelectPanel.tsx
• Updates CSS comments to be more concise and removes outdated TODO about feature flag removal

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/react/src/SelectPanel/SelectPanel.tsx	Adds comprehensive comment explaining dual close button implementation and their use cases
packages/react/src/SelectPanel/SelectPanel.module.css	Simplifies header comment and removes outdated TODO about feature flag

[Copilot]

Missing article 'the' before 'SelectPanel'. Should be 'Align the SelectPanel header text with the AnchoredOverlay close button'

Suggested change

	* Align SelectPanel header text with AnchoredOverlay close button
	* Align the SelectPanel header text with the AnchoredOverlay close button