Adapt tests

Tester skills mention Playwright, API, and unit layers. Point them at your commands by editing the tester brief and the testing skills only if the defaults do not match.

Your tests	What to tell the tester
Jest / Vitest	npm test in the UI package
Playwright already in-repo	Use that project; do not add a second Playwright tree
JUnit / TestNG	mvn test or gradle test
pytest	pytest path/to/module
xUnit / NUnit	dotnet test
No UI	Skip Playwright; keep unit + API

Do not add new test frameworks unless a requirement says so. Do not install unpinned @playwright/test into the product package.json — it belongs to automation-tests/ when that tree exists.

Playwright must implement qa-test-cases.md 1:1, not invent a second scenario list. See test layers.