Vite Ecosystem CI: Additionally test on a built Storybook

[valentinpalkovic]

Closes #

What I did

We have added an additional test run to Vite's Ecosystem CI test script, so that Storybook's functionality is tested on both, dev and build modes.

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

This section is mandatory for all contributions. If you believe no manual test is necessary, please state so explicitly. Thanks!

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

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 canary-release-pr.yml --field pr=<PR_NUMBER>

Greptile Summary

Let me provide a clear and concise summary of this pull request.

Adds an additional test run to the Vite Ecosystem CI workflow to validate Storybook's functionality in both development and build modes.

• Modified vite-ecosystem-ci:test script in /package.json to include test-runner execution in build mode
• Ensures more comprehensive testing of Vite integration by covering both dev and build environments
• Change is focused specifically on CI testing improvements for Vite ecosystem compatibility
• No breaking changes or dependency updates required
• Implementation is straightforward and maintains existing test structure

The change is minimal but strategic, improving test coverage without adding complexity to the testing process.

[greptile-apps]

LGTM

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