feat: add hazardous goods declaration feature

- Introduced HazardDeclarationPanel component to display dangerous goods declaration details.
- Updated URL constants to include CLEARANCE_PROCEED endpoint for re-requesting operations.
- Enhanced permissions to include hazardous approval roles for contract approvals.
- Integrated HazardDeclarationPanel into ContractRequestDetailPage and ContractClearanceDetailPage.
- Added proceedToOperation method in bookings service for handling operation re-requests.
- Updated contract forms and schemas to include hazard class and UN number fields.
- Implemented validation for hazardous contracts in the contract creation flow.
- Added expiry notice functionality for contracts nearing validity end.
- Created tests for expiry notice calculations and labels.
- Updated UI components to reflect hazardous cargo information and validation errors.

apps/edr-freight-api/src/contracts/contract-document-view-model.builder.ts

@@ -1,4 +1,5 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
+import { hazardClassLabel } from '@edr/types';
 
 import { ContractsRepository } from '../modules/contracts/contracts.repository';
 import {
@@ -143,6 +144,11 @@ export class ContractDocumentViewModelBuilder {
 
     const hasCustomer = signatures.some((s) => s.role === 'CUSTOMER');
     const hasStaff = signatures.some((s) => s.role === 'STAFF');
+    // Signed before company stamps were required — the customer has to sign
+    // again to attach one, otherwise EDR can never counter-sign the contract.
+    const customerStampMissing = signatures.some(
+      (s) => s.role === 'CUSTOMER' && !s.stampImageUrl,
+    );
     const hasContractFile = Boolean(
       contract.files?.some((f) => f.code === 'contract'),
     );
@@ -185,7 +191,9 @@ export class ContractDocumentViewModelBuilder {
       // Cast: contract signers (CUSTOMER|STAFF|DIRECTOR|CEO) widen the booking
       // view-model's narrower CUSTOMER|STAFF role union.
       signatures: signatures as unknown as ContractViewModel['signatures'],
-      canSignCustomer: contract.status === 'CONTRACT_READY' && !hasCustomer,
+      canSignCustomer:
+        (contract.status === 'CONTRACT_READY' && !hasCustomer) ||
+        (contract.status === 'SIGNED_CUSTOMER' && customerStampMissing),
       canSignStaff:
         contract.status === 'SIGNED_CUSTOMER' && hasCustomer && !hasStaff,
       hasContractDocument: hasContractFile,
@@ -295,7 +303,16 @@ export class ContractDocumentViewModelBuilder {
       cargoDescription: this.valueOrDash(cargoName),
       totalWeightVgm: '—',
       equipmentReturn: this.valueOrDash(contract.equipmentReturn),
-      hazardousLabel: contract.isHazardous ? 'Yes' : 'No',
+      // A hazardous contract names the declared class + UN number on the
+      // schedule — the flag alone is not a dangerous-goods declaration.
+      hazardousLabel: contract.isHazardous
+        ? [
+            hazardClassLabel(contract.hazardClass) ?? 'Yes',
+            contract.unNumber ? `UN ${contract.unNumber}` : null,
+          ]
+            .filter(Boolean)
+            .join(' · ')
+        : 'No',
       firstMilePickupAddress: this.valueOrDash(contract.firstMilePickupAddress),
       lastMileDeliveryAddress: this.valueOrDash(contract.lastMileDeliveryAddress),
     };