- Extract mobile-menu.js and tabs.js from app.js
- Add Vitest tests with happy-dom and v8 coverage (100% on modules)
- Add JS test step to CI frontend and SonarQube workflows
- SonarQube: add JS lcov coverage report path
- SitemapController: extract URLSET_TEMPLATE constant, deduplicate methods
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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