feat: add contract extension request functionality

- Implemented  method in  to allow customers to request an extension for expired contracts.
- Added  component in  for users to initiate extension requests.
- Updated  to include logic for handling extension requests for expired contracts.
- Enhanced  to display extension request options and status.
- Created migration to add  and  columns to the contracts table.
- Added unit tests for contract extension request and handling in .
- Defined DTOs for request and extension in .
- Updated types in  to include new fields related to contract extensions.

apps/edr-freight-web/backoffice/src/services/contracts.service.ts

@@ -303,6 +303,14 @@ export const contractsService = {
   resume: (id: string, note?: string) =>
     postContract<Freight.IContract>(C.RESUME(id), { note }),
 
+  /**
+   * Add validity days to an EXPIRED contract the customer asked to extend; it
+   * returns to the status it held before it lapsed. The API refuses it while
+   * no customer request is pending.
+   */
+  extend: (id: string, payload: Freight.ExtendContractDto) =>
+    postContract<Freight.IContract>(C.EXTEND(id), payload),
+
   /**
    * Approve the next pending step. The server resolves the step's required role
    * and authorizes against it — the client never declares its own role.