完善借款、编号、付款与预算并发及验收（09-06-release-gate-integrity）

汇总已落盘的借款本金与还款、兼容历史编号的周期化编号、付款责任与回单核验、报销进度和排序、PWA/采购事务、错误原因与日期校验及ERP退役。
统一共享预算池锁序和锁后判断，恢复差旅原预算选择，补原因码固定夹具及反向完整性检查。
纳入配套迁移、测试、受管QA、分层验收合同、规约及任务记录；原始证据留在ignored artifacts。

关联任务：09-17-company-loan-principal-repayment、09-17-erp-exclusive-retirement、09-18-reimbursement-periodic-numbering、09-08-reimbursement-payment-closeout、09-18-local-concurrency-product-fixes、09-19-budget-pool-concurrency、09-05-error-explainability-payment-readiness。
预算补审由Claude定向验证2文件928项通过，原4446/28及r6结果仍仅对应各自历史输入；本轮未重跑测试。
完整新候选门禁、R1真实入口接入与12项公网义务仍开放。生产编号未启用、差旅仍冻结；不推送、不部署，不宣称发布资格。

client/tests/e2e/interaction-pattern-unification.spec.ts

@@ -43,7 +43,19 @@ test("R12 普通用户错误消息只经过共享解析入口且不显示内部
   expect(residuals).toEqual([]);
   expect(directMapperConsumers).toEqual([]);
   expect(rawThrownMessageConsumers).toEqual([]);
-  expect(resolveErrorMessage(new ApiError({ status: 400, code: "VALID_001", message: "VALID_001: 请补充审批意见" }))).toBe("请补充审批意见");
+  const unknownValidation = "操作未完成，请核对页面提示；如仍无法继续，请联系管理员协助处理。";
+  expect(resolveErrorMessage(new ApiError({ status: 400, code: "VALID_001", message: "VALID_001: 请补充审批意见" }))).toBe(unknownValidation);
+  expect(resolveErrorMessage(new ApiError({
+    status: 400, code: "VALID_001", message: "合成内部解析内容", requestId: "synthetic-request-12",
+    details: { reasonCode: "synthetic.unknown_reason", file: "合成单元格" },
+  }))).toBe(`${unknownValidation} 排障编号：synthetic-request-12`);
+  expect(resolveErrorMessage(new ApiError({
+    status: 400, code: "VALID_001", message: "合成内部解析内容", requestId: "/synthetic/private/path",
+  }))).toBe(unknownValidation);
+  expect(resolveErrorMessage(new ApiError({
+    status: 400, code: "VALID_001", message: "合成内部解析内容",
+    details: { reasonCode: "user.import_file_invalid", file: "invalid_format" },
+  }))).toBe("导入文件格式损坏或无法解析，请重新导出为CSV或XLSX后再上传。");
   expect(resolveErrorMessage(new Error("500: 保存失败"), "保存失败，请稍后重试")).toBe("保存失败");
   expect(resolveErrorMessage(new Error("Failed to fetch /api/workflow/tasks"), "加载审批任务失败")).toBe("加载审批任务失败");
   expect(resolveErrorMessage(new Error("读取失败 /tmp/private/payload.json"), "读取资料失败")).toBe("读取资料失败");