Implement intercity document handling and rejection notes for contracts

apps/edr-freight-api/src/modules/contracts/contracts.service.ts

@@ -642,6 +642,47 @@ export class ContractsService {
       }
     }
 
+    // Surface the rejection reason. The approval-step note is wiped on
+    // send-back resets, so the review-note trail is the only durable source.
+    if (contract.status === 'REJECTED') {
+      try {
+        const note = await this.contractsRepository.findLatestReviewNote(
+          contract.id,
+          'REJECTION',
+        );
+        contract.latestRejectionNote = note?.body ?? null;
+      } catch {
+        contract.latestRejectionNote = null;
+      }
+    }
+
+    // Surface the send-back reason to the returned-to approver, but only while
+    // it is still actionable: once any step acts after the send-back the note
+    // is stale and stays out of the response (the trail keeps it in the DB).
+    if (contract.status === 'PENDING_APPROVAL') {
+      try {
+        const note = await this.contractsRepository.findLatestReviewNote(
+          contract.id,
+          'STAFF_NOTE',
+        );
+        // Stale when any step acted after it (send-back resolved) or when the
+        // chain itself is newer than the note (fresh cycle after a resubmit).
+        const staleAfter = Math.max(
+          0,
+          ...(contract.approvalSteps ?? []).flatMap((s) => [
+            s.actedAt ? new Date(s.actedAt).getTime() : 0,
+            s.createdAt ? new Date(s.createdAt).getTime() : 0,
+          ]),
+        );
+        contract.latestSendBackNote =
+          note && new Date(note.createdAt).getTime() > staleAfter
+            ? note.body
+            : null;
+      } catch {
+        contract.latestSendBackNote = null;
+      }
+    }
+
     return contract;
   }