- Import EstimateStatus enum instead of using "DRAFT" string literal
- Type BASE_VERSION fixture explicitly so lockedAt accepts Date | null
- Add non-null assertion on mock.calls[0] to satisfy strict types
- Reorder id/spread in version fixture to avoid duplicate property warning
Phase 3b continued: covers chargeability-relevance pure functions,
estimate CRUD (create, clone, list with filters), and version lifecycle
(submit, approve, create revision) with NOT_FOUND and status guard tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Hartmut