chore: make autofix workflow steps parallel

[trueberryless]

🔗 Linked issue

🧭 Context

Using GitHub's new parallel feature for action steps: https://github.blog/changelog/2026-06-25-actions-steps-can-now-be-run-in-parallel/

I went through all our GitHub actions and this was the only place where we can really safe some seconds and where parallelism is possible.

📚 Description

This PR wraps the four main steps in the autofix.yml action in a parallel block, so they are executed simultaneously. This is only possible because they do not depend on each other:

• lint:css and i18n:check only read
• build:lunaria only generates files under dist/lunaria
• lint:fix does not touch build outputs

[vercel]

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Project	Deployment	Actions	Updated (UTC)
npmx.dev	Ready	Preview, Comment	Jun 28, 2026 9:49am

2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ignored	Preview	Jun 28, 2026 9:49am
npmx-lunaria	Ignored		Jun 28, 2026 9:49am

[coderabbitai]

📝 Walkthrough

Walkthrough

The four autofix workflow steps (CSS class lint, translation comparison, lunaria data build, and lint fixing) in .github/workflows/autofix.yml are wrapped in a parallel block, changing their execution from sequential to concurrent. Step definitions and commands are unchanged.

Changes

Autofix Workflow Parallelisation

Layer / File(s)	Summary
Wrap autofix steps in parallel block .github/workflows/autofix.yml	The existing vp run ... steps for CSS class lint, translation comparison, lunaria data build, and lint fixing are grouped under a parallel section, making them run concurrently rather than sequentially.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description check	✅ Passed	The description is directly related and explains the parallelisation rationale and affected steps.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly matches the main change: running autofix workflow steps in parallel.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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