TestForm now accepts optional onBack/backLabel props.
TestEdit passes 'К просмотру теста' back button when in edit mode.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Backend:
- migration 003: add parent_id to tests table
- PUT /api/tests/{id}: edit in place if no attempts, create new version otherwise
- GET /api/tests: show only latest versions (no successor)
Frontend:
- TestForm: extracted reusable form component
- TestCreate: refactored to use TestForm
- TestEdit: full edit mode with pre-populated form, version redirect on new version
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>