Some checks failed
Adds a static grep step that runs after Lint and before the test suite.
Fails in ~1 s if any file under frontend/src/ contains the banned
vi.mock('pdfjs-dist' pattern, catching the regression before Playwright
spins up. Belt-and-suspenders with the ESLint rule (ADR 012).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>