- Dedicated 'Run unit tests' step (npm run test:unit) so unit tests are visible and guaranteed in CI rather than implied by the build script. - Build now calls react-scripts build directly, avoiding a redundant second Jest run (CI=true still fails the build on lint warnings). - Bump Node 18 (EOL) -> 20 and enable npm dependency caching. Co-Authored-By: Claude Opus 4.8 <[email protected]>