feat(permissions): add granular permissions for train management actions

feat(train-builder): update permissions checks for train actions in UI
feat(contracts): enhance contract view and shipment request pages with new features
test(shipment-preview): add tests for customs clearing logic in booking preview
style(contract-sign-bar): create CSS for fixed sign bar layout

apps/edr-freight-api/src/modules/contracts/contract-booking.service.ts

@@ -1974,6 +1974,11 @@ export class ContractBookingService {
       isReefer: this.resolveShipmentHandlingFlag(contract, dto, 'reeferQuantity'),
       equipmentReturn: this.resolveShipmentEquipmentReturn(contract, dto),
       isGovernment: contract.isGovernment,
+      // The clearance fee is gated on this flag in BookingPricingService, and
+      // createUnderContract copies it off the contract. Omitting it here priced
+      // the preview WITHOUT the customs line the created booking is then billed
+      // — the customer confirmed one total and got invoiced a larger one.
+      customsClearingEnabled: contract.customsClearingEnabled,
       shippingLineId: null,
       contractRouteId: route?.id ?? null,
       originYardId: route?.originYardId ?? null,