fix: Update flashing of menu item on first render

[mannycarrera4]

Summary

Fixes: #3712

Release Category

Components

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Checklist

• MDX documentation adheres to Canvas Kit's Documentation Guidelines
• Label ready for review has been added to PR

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• PR summary describes the change (Fixes/Resolves linked correctly)
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[cypress]

Workday/canvas-kit    Run #10871

Run Properties:   Passed #10871  •  6535b3bf9b ℹ️: Merge b8db8ad0ee643a3bda489f9ac0adbad4f031b91c into 45a9962cf11155d55db53cb5f291...

Project	Workday/canvas-kit
Branch Review	mc-flash
Run status	Passed #10871
Run duration	02m 31s
Commit	6535b3bf9b ℹ️: Merge b8db8ad0ee643a3bda489f9ac0adbad4f031b91c into 45a9962cf11155d55db53cb5f291...
Committer	Manuel Carrera
View all properties for this run ↗︎

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Test results
Failures	0
Flaky	0
Pending	86
Skipped	0
Passing	863
View all changes introduced in this branch ↗︎

UI Coverage  19.58%
Untested elements	1538
Tested elements	372

Accessibility  99.32%
Failed rules	6 critical   5 serious   0 moderate   2 minor
Failed elements	78

[Copilot]

Pull request overview

This PR fixes an initial-render focus styling bug in the @workday/canvas-kit-react/collection cursor utilities that could cause a menu/list item to appear “focused” (blue flash) when cursorId is an empty string.

Changes:

• Update isCursor to explicitly treat null, undefined, and '' cursor IDs as “no cursor” (always returns false).
• Add unit tests covering isCursor behavior for empty-string, null/undefined, string, and array cursor IDs.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
modules/react/collection/lib/useCursorListModel.tsx	Fixes isCursor logic to avoid false positives when cursorId is empty.
modules/react/collection/spec/useCursorModel.spec.tsx	Adds test coverage for isCursor, including the empty-string regression case.

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.