add company stamp upload functionality for contract signing

- Introduced StampUpload component for uploading company stamp images.
- Integrated stamp upload in contract signing modal, supporting PNG and JPG formats.
- Implemented validation for file type and size (max 5 MB).
- Added visual feedback for drag-and-drop functionality.
- Updated contract-related pages to handle duplicate contract alerts and pricing notices.
- Enhanced contract expiry management with a nightly sweep service.
- Added unit tests for new features and updated existing tests for contract handling.

apps/edr-freight-api/src/modules/rule-engine/rule-engine.service.ts

@@ -2,6 +2,7 @@ import { Inject, Injectable, BadRequestException } from '@nestjs/common';
 import { DataSource } from 'typeorm';
 import { BookingRateSnapshot } from '../bookings/entities/booking-rate-snapshot.entity';
 import { Rate, RateTrigger } from './entities/rate.entity';
+import { isBulkQuantityUnit } from './entities/rate-unit.util';
 import {
   ICargoTypesRepository,
   CARGO_TYPES_REPOSITORY,
@@ -377,6 +378,9 @@ export class RuleEngineService {
       let calculatedAmount: number;
 
       switch (rate.rateUnit) {
+        // PER_ITEM is PER_TON for a counted (break-bulk) commodity — the bulk
+        // quantity is recorded in the commodity's own unit either way.
+        case 'PER_ITEM':
         case 'PER_TON':
           // OVERWEIGHT bills the excess tons; every other PER_TON surcharge
           // (e.g. bulk reefer) bills the full bulk tonnage.
@@ -608,7 +612,7 @@ export class RuleEngineService {
     if (!rate) return modifiers;
 
     const billedQty =
-      rate.rateUnit === 'PER_TON'
+      isBulkQuantityUnit(rate.rateUnit)
         ? Math.max(0, Number(input.bulkTons ?? 0))
         : rate.rateUnit === 'PER_WAGON'
           ? Math.max(0, Number(input.bulkWagons ?? 0))