- Introduced DEACTIVATED status for trains, allowing staff to park trains indefinitely.
- Implemented methods to deactivate and reactivate trains in the TrainBuilderService.
- Added UI components for train deactivation and reactivation in TrainBuilderDetailPage.
- Created a dropdown setting for admin-managed import train numbers, with corresponding migrations.
- Updated yard code length to accommodate soft-delete suffix.
- Enhanced train status handling to include DEACTIVATED state.
- Add DTOs for creating booking orders and viewing contract quantities.
- Create entities for booking orders and booking order lines.
- Implement service for managing general contract operations, including activation after payment and retrieving quantity lines.
- Develop UI components for contract detail and list pages, including order placement dialog.
- Integrate API service for booking orders, enabling listing and creating orders against contracts.
- Enhance contract status display and quantity pool visualization in the UI.
