- Set IS_NIGHTLY=true for all Playwright test runs
- Update CI workflows to pass IS_NIGHTLY=true to test commands
- Update package.json test:browser scripts to include IS_NIGHTLY=true
- Update dialog test to expect 'oss-nightly' instead of 'oss'
- Also update playwright expectations workflow to use IS_NIGHTLY=true
This ensures consistent test behavior regardless of where tests run,
since Playwright tests now always run with IS_NIGHTLY=true.
- Add viewport clipping to mobile baseline tests to reduce flakiness
- Clip top 15% of viewport for all @mobile screenshot tests
- Affects:
- mobileBaseline.spec.ts: empty canvas and default workflow tests
- pan.spec.ts: touch pan test
- move.spec.ts: touch node move test
- This helps reduce test flakiness from variable mobile UI elements
