e2e-testing

End-to-end testing and verification for SentenceStudio. USE THIS SKILL whenever the user says "test", "verify", "check", "validate", "confirm it works", "smoke test", "run the app and check", "does it work", "try it", "make sure", or any variation of testing a feature or fix in a running app. Also use after EVERY bug fix or feature implementation as a mandatory final verification step — even if you think a build check is enough. Covers: launching via Aspire, interacting with Playwright (webapp) or maui-ai-debugging (native), verifying UI state, checking database records, and reading structured logs. If someone asks you to test anything in this app, or to verify a fix works, or to run a smoke test, or to check that CRUD operations work, or to confirm audio/quiz/import/activity features behave correctly — this is the skill to use. Do NOT skip this skill when verification is needed.