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/modules/contracts/dto/create-contract.dto.ts

@@ -17,6 +17,8 @@ import {
   ValidateNested,
 } from 'class-validator';
 
+import { HAZARD_CLASS_VALUES } from '@edr/types';
+
 import { CONTRACT_KINDS } from '../entities/contract.entity';
 
 const TRADE_DIRECTIONS = ['IMPORT', 'EXPORT', 'DOMESTIC'] as const;
@@ -228,6 +230,28 @@ export class CreateContractDto {
   @Transform(({ value }) => value === 'true' || value === true)
   isHazardous?: boolean;
 
+  @ApiPropertyOptional({
+    enum: HAZARD_CLASS_VALUES,
+    description: 'UN/ADR dangerous-goods class. Required when isHazardous.',
+  })
+  @ValidateIf((o: CreateContractDto) => o.isHazardous === true)
+  @IsIn(HAZARD_CLASS_VALUES, {
+    message: `hazardClass must be one of: ${HAZARD_CLASS_VALUES.join(', ')}`,
+  })
+  hazardClass?: string;
+
+  @ApiPropertyOptional({
+    description: 'UN number of the dangerous good. Required when isHazardous.',
+  })
+  @ValidateIf((o: CreateContractDto) => o.isHazardous === true)
+  @IsString()
+  @MinLength(1)
+  @MaxLength(16)
+  @Transform(({ value }) =>
+    typeof value === 'string' ? value.trim().toUpperCase() : value,
+  )
+  unNumber?: string;
+
   @ApiPropertyOptional({ default: false, description: 'Sets contracts.is_reefer' })
   @IsOptional()
   @IsBoolean()