UI change — E2E required

Applies when the project has a frontend E2E setup (e2e/, playwright.config.*, or path in AGENTS.md).

New or changed screen

1. Find or create spec under the project's E2E folder.
2. Cover the new or changed behavior.
3. Prefer data-testid or stable roles over fragile CSS classes.
4. Run the project's E2E command before closing (npm run test:e2e, pnpm test:e2e, etc.).

Bug fix

1. Check if a spec exists for that area.
2. Add a test case that reproduces the bug (or extend existing spec).
3. Order: failing test → fix → green E2E.
4. Do not mark the bug fixed without a regression test.

API writes in E2E