refactor: common vitest configurations

[poltorak]

Centralize and Standardize Vitest Configurations

What Changed

• New centralized configuration system: Created testing/test-setup-config package with a factory-based approach for generating Vitest configurations
• Setup presets: Introduced modular setup file presets that can be composed for different test types (unit, integration, e2e)
• Simplified configuration files: Refactored 6 existing Vitest config files to use the new centralized system, reducing them from verbose configurations to simple function calls

Benefits

• Eliminates duplication: Removes repetitive boilerplate across multiple vitest config files
• Ensures consistency: Standardizes test configurations, coverage settings, and setup files across all packages
• Improves maintainability: Changes to test configuration defaults now only need to be made in one place
• Better developer experience: New configs are more readable and easier to customize with sensible defaults and preset combinations

The new system provides createUnitConfig, createIntConfig, and createE2eConfig factory functions that automatically handle common configuration patterns while still allowing customization through override parameters.

Relates to first part of #1065

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 9433ca5

Command	Status	Duration	Result
nx code-pushup --nx-bail -- compare	✅ Succeeded	1m 4s	View ↗
nx code-pushup --nx-bail --	✅ Succeeded	1m 27s	View ↗
nx code-pushup --nx-bail -- print-config --outp...	✅ Succeeded	4m 23s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-09-09 14:17:53 UTC

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commit: 9433ca5

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 0640602 with previous commit df16191.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Performance	🔴 37	🔴 36
Code coverage	🟡 90	🟡 90
Security	🟡 64	🟡 64	–
Updates	🟡 85	🟡 85	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 61	🟡 61	–
Type Safety	🟢 100	🟢 100	–
Bug prevention	🟢 100	🟢 100	–
Miscellaneous	🟢 100	🟢 100	–
Code style	🟢 100	🟢 100	–
Documentation	🔴 24	🔴 24	–

👎 2 groups regressed, 👍 4 audits improved, 👎 5 audits regressed, 12 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
Lighthouse	Performance	🔴 37	🔴 36
Code coverage	Code coverage metrics	🟡 90	🟡 90

19 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Initial server response time was short	🟥 Root document took 650 ms	🟩 Root document took 540 ms
Lighthouse	Total Blocking Time	🟥 1,640 ms	🟥 2,400 ms
Lighthouse	First Contentful Paint	🟥 3.2 s	🟨 3.0 s
Lighthouse	Speed Index	🟥 6.2 s	🟥 6.4 s
Lighthouse	Time to Interactive	🟥 16.0 s	🟥 17.0 s
Code coverage	Line coverage	🟨 86.3 %	🟨 84.4 %
Lighthouse	Max Potential First Input Delay	🟥 800 ms	🟥 920 ms
Code coverage	Function coverage	🟩 92.3 %	🟩 92.4 %
Code coverage	Branch coverage	🟨 85.5 %	🟨 85.5 %
Lighthouse	Avoids enormous network payloads	🟨 Total size was 2,687 KiB	🟨 Total size was 2,724 KiB
Lighthouse	Minimizes main-thread work	🟥 9.6 s	🟥 11.5 s
Lighthouse	Uses efficient cache policy on static assets	🟨 30 resources found	🟨 31 resources found
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	JavaScript execution time	🟥 4.2 s	🟥 4.9 s
Lighthouse	Largest Contentful Paint	🟥 11.0 s	🟥 11.2 s
Lighthouse	Server Backend Latencies	🟩 1,540 ms	🟩 1,450 ms
Lighthouse	Reduce unused JavaScript	🟥 Potential savings of 602 KiB	🟥 Potential savings of 598 KiB
Lighthouse	Avoids an excessive DOM size	🟥 2,296 elements	🟥 2,303 elements
JS Packages	Outdated NPM dev dependencies.	🟨 50 outdated package versions (21 major, 23 minor, 6 patch)	🟨 56 outdated package versions (21 major, 29 minor, 6 patch)
JS Packages	Outdated NPM prod dependencies.	🟨 14 outdated package versions (3 major, 6 minor, 5 patch)	🟨 16 outdated package versions (3 major, 8 minor, 5 patch)
Lighthouse	Network Round Trip Times	🟩 70 ms	🟩 70 ms

589 other audits are unchanged.

[BioPhoton]

Thanks for cleaning up our test config mess :)

I left some comments.

• please add a proper PR description that contains the scope and planned changes
• move the config code under a Nx project in testing/vitest-setup. I updated the issue accordingly.