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/lib/permissions.ts

@@ -26,6 +26,7 @@ export const FREIGHT_PERMS = {
     reviewDocuments: "edr_freight_app:bookings:review_documents",
     uploadClearanceOutput: "edr_freight_app:bookings:upload_clearance_output",
     finalizeClearance: "edr_freight_app:bookings:finalize_clearance",
+    docReviewAlert: "edr_freight_app:bookings:doc_review_alert",
   },
   contracts: {
     view: "edr_freight_app:contracts:view",
@@ -477,6 +478,17 @@ export function canAccessBookings(user: AuthUser | null | undefined): boolean {
   return hasPermission(user, FREIGHT_PERMS.bookings.view);
 }
 
+/**
+ * Sees the header countdown warning that document review is about to end with
+ * requests still undecided. Its own permission — granted per position type, so
+ * only the desks that act on those requests get alarmed.
+ */
+export function canSeeDocReviewAlert(
+  user: AuthUser | null | undefined,
+): boolean {
+  return hasPermission(user, FREIGHT_PERMS.bookings.docReviewAlert);
+}
+
 export function canAccessContracts(user: AuthUser | null | undefined): boolean {
   return hasPermission(user, FREIGHT_PERMS.contracts.view);
 }