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-api/src/modules/contracts/contracts.controller.ts

@@ -78,6 +78,10 @@ import {
 import { SignContractDto } from './dto/sign-contract.dto';
 import { ReviewClearanceDocumentDto } from './dto/review-clearance-document.dto';
 import { RenewContractDto } from './dto/renew-contract.dto';
+import {
+  ExtendContractDto,
+  RequestContractExtensionDto,
+} from './dto/extend-contract.dto';
 import {
   CompleteConsolidatedPairDto,
   CreateBookingUnderContractDto,
@@ -528,6 +532,52 @@ export class ContractsController {
     );
   }
 
+  @Post(':id/extension-request')
+  @PortalCustomer()
+  @ApiOperation({
+    summary: 'Customer asks EDR to extend the validity of their expired contract',
+  })
+  async requestExtension(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: RequestContractExtensionDto,
+    @CurrentUser() user: TCurrentUser,
+  ) {
+    // Same ownership rule as cancel/renew: staff with bookings.view/contracts.view
+    // pass through, everyone else must own the contract's company.
+    const contract = await this.contractsService.findById(id);
+    if (
+      !hasFreightPermission(user, FREIGHT_PERMS.bookings.view) &&
+      !hasFreightPermission(user, FREIGHT_PERMS.contracts.view)
+    ) {
+      await this.contractsService.assertCustomerCanAccessContract(user?.id, contract);
+    }
+    return this.transitionService.requestExtension(
+      id,
+      dto.note,
+      resolveAuthUserId(user),
+    );
+  }
+
+  @Post(':id/extend')
+  @BookingStaff(FREIGHT_PERMS.contracts.extend)
+  @ApiOperation({
+    summary:
+      'Staff extend an expired contract the customer asked to extend — it returns to its pre-expiry status',
+  })
+  extend(
+    @Param('id', ParseUUIDPipe) id: string,
+    @Body() dto: ExtendContractDto,
+    @CurrentUser() user: TCurrentUser,
+  ) {
+    return this.transitionService.extend(
+      id,
+      dto.days,
+      dto.note,
+      resolveAuthUserId(user),
+      user,
+    );
+  }
+
   @Post(':id/cancel')
   @PortalCustomer()
   @ApiOperation({