fix: 加固日历日期与动态错误合同（09-05-error-explainability-payment-readiness，09-08-reimbursement-payment-closeout）

client/src/api/errorMessages.ts

@@ -1,4 +1,5 @@
 import { formatInvoiceOcrFieldLabels } from "../lib/invoiceOcr";
+import { formatDisplayDateTime } from "../lib/displayFormat";
 import { resolveErrorReasonMessage, UNKNOWN_VALIDATION_MESSAGE } from "./errorReasons";
 
 function readStringList(value: unknown): string[] {
@@ -307,8 +308,9 @@ export function mapApiErrorMessage(
 
     if (details?.workflow === "remind_too_frequent") {
       const nextAllowedAt = typeof details?.nextAllowedAt === "string" ? details.nextAllowedAt : null;
-      return nextAllowedAt
-        ? `24 小时内已催办过，请在 ${nextAllowedAt.slice(0, 19).replace("T", " ")} 后再试。`
+      return nextAllowedAt && /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?Z$/.test(nextAllowedAt)
+        && Number.isFinite(new Date(nextAllowedAt).getTime())
+        ? `24 小时内已催办过，请在北京时间 ${formatDisplayDateTime(nextAllowedAt, { includeSeconds: true })} 后再试。`
         : "24 小时内已催办过。";
     }