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-web/backoffice/src/pages/ruleEngine/RuleEngineResourcePage.tsx

@@ -59,6 +59,7 @@ import {
     RULE_ENGINE_CATEGORY_BASE_PATH,
     RULE_ENGINE_SELECT_NONE,
     getRuleEngineResource,
+    rateUnitOptions,
     type RuleEngineNavCategory,
 } from "@/pages/ruleEngine/config/resources";
 import type { RateChangeRequest } from "@/services/ruleEngine/ruleEngine.service";
@@ -344,6 +345,20 @@ const RuleEngineResourcePage = () => {
           options: cargoLeafOptions ?? [],
         };
       }
+      // Rate units follow the picked commodity: a per-item (break-bulk) cargo
+      // is priced per item where a weighed one is priced per ton.
+      if (field.name === "rateUnit" && field.optionsFromValues) {
+        return {
+          ...field,
+          optionsFromValues: (values: Record<string, unknown>) =>
+            rateUnitOptions(
+              values,
+              (cargoLeafOptions ?? []).find(
+                (o) => o.value === String(values.cargoTypeId ?? ""),
+              )?.unitOfMeasure ?? "",
+            ),
+        };
+      }
       if (field.name === "rateId") {
         return {
           ...field,