- Replace clipboard, variable, centerline, layout, menu, and text formatting assertions with explicit guards
- Use expectDefined and getNodeOrThrow instead of postfix non-null assertions
- Validate affected engine and E2E tests
- Replace browser store non-null assertions with explicit initialization guards
- Use expectDefined for optional test resources and tool results
- Clean low-count non-null assertions in font, icon, snap, OKHCL, and visual tests
- Configure oxfmt custom import groups for workspace, app, package, and test aliases
- Keep type imports grouped with their matching source category instead of one global tail group
- Expand the format script to cover formatter config, Vite files, and scripts
- Move top-level engine and e2e prefixed test files under domain folders
- Update fixture path helpers after moving render and pen tests
- Add lint coverage to prevent new top-level prefixed test files
- Refresh testing docs for the new fig and layout paths
