Tests: Fix Layout story unduly failing

[Sidnioulz]

What I did

A recent PR introduced a change that breaks a layout story even though the PR CI is green.

This fixes the story to match with my expectation.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

1. Visit http://localhost:6006/?path=/story/manager-layout--desktop-collapsed-panel
2. Notice play function passes

Documentation

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Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

🦋 Canary release

This PR does not have a canary release associated. You can request a canary release of this pull request by mentioning the @storybookjs/core team here.

core team members can create a canary release here or locally with gh workflow run --repo storybookjs/storybook publish.yml --field pr=<PR_NUMBER>

Summary by CodeRabbit

• Tests
  • Updated the collapsed panel component validation to verify complete removal from the DOM instead of checking for zero-height rendering and focus behavior.

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 7adec54

Command	Status	Duration	Result
nx run-many -t compile -c production --parallel=1	✅ Succeeded	5m 13s	View ↗

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☁️ Nx Cloud last updated this comment at 2026-03-09 07:56:45 UTC

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 68b10220-bd46-4bea-b7e7-4293cd88ad6f

📥 Commits

Reviewing files that changed from the base of the PR and between 533dcc0 and 7adec54.

📒 Files selected for processing (1)

• code/core/src/manager/components/layout/Layout.stories.tsx

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📝 Walkthrough

Walkthrough

The change modifies test assertions in the DesktopCollapsedPanel Storybook story, replacing separate checks for collapsed rendering (zero height and no focus capability) with a single assertion that validates the panel element is entirely absent from the DOM.

Changes

Cohort / File(s)	Summary
DesktopCollapsedPanel Story Assertions code/core/src/manager/components/layout/Layout.stories.tsx	Replaced two assertions checking panel height and focus state with a single assertion validating panel DOM absence via queryByTestId.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• UI: Handle kb nav edge cases when preview and panel are hidden #33588 — Modifies the same DesktopCollapsedPanel story assertions, transitioning from collapsed rendering validation to DOM-absence checks.
• Build: Fix layout stories #32577 — Updates Layout.stories.tsx rendering behavior through mockManagerStore/Provider configuration, affecting the same story file.

✨ Finishing Touches

• 📝 Generate docstrings (stacked PR)
• 📝 Generate docstrings (commit on current branch)

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