feat(P17B-3,P17B-4): 增加采购归档前端与审批链路E2E

client/src/pages/WorkflowTaskDetailPage.tsx

@@ -189,6 +189,7 @@ export function WorkflowTaskDetailPage() {
         {detail.purchaseRequest ? (
           <>
             <div>采购单号：{detail.purchaseRequest.requestNo ?? detail.purchaseRequest.id}</div>
+            <div>标题：{detail.purchaseRequest.title || "-"}</div>
             <div>申请人：{detail.purchaseRequest.applicant?.name ?? "-"}</div>
             <div>供应商：{detail.purchaseRequest.supplier?.name ?? "-"}</div>
             <div>法体：{detail.purchaseRequest.legalEntity?.name ?? "-"}</div>