The standalone viewer smoke test verifies the write-on DOM invariants, including that masked contours are not used. Add an opt-in diagnostics mode for browser investigations: a screenshot and/or Playwright trace on demand or test failure.
Keep the normal npm command fast and artifact-free; diagnostics should be easy to request when investigating rendering or performance regressions.
The standalone viewer smoke test verifies the write-on DOM invariants, including that masked contours are not used. Add an opt-in diagnostics mode for browser investigations: a screenshot and/or Playwright trace on demand or test failure.
Keep the normal npm command fast and artifact-free; diagnostics should be easy to request when investigating rendering or performance regressions.