实现报销材料合并预览与差旅概要（07-27-yang-jun-reimbursement-readiness）

client/src/lib/reimbursementTravel.ts

@@ -0,0 +1,11 @@
+import type { ReimbursementDetail } from "../api/reimbursements";
+
+export function isTravelReimbursement(detail: ReimbursementDetail) {
+  return Boolean(detail.travelSummary?.isTravel || detail.linkedTravelRequestId || detail.items.some((item) => item.expenseType?.category === "travel"));
+}
+
+export function hasCompleteTravelSummary(detail: ReimbursementDetail) {
+  if (!isTravelReimbursement(detail)) return true;
+  const summary = detail.travelSummary;
+  return Boolean(summary?.purpose && summary.location && summary.startDate && summary.endDate);
+}