修复前端降噪审计问题（frontend-simplification-audit-fixes）

client/src/pages/reimbursement-detail/ReimbursementActions.tsx

@@ -6,6 +6,10 @@ import { Textarea } from "../../components/ui/textarea";
 
 type PaymentChannel = "bank" | "alipay" | "wechat" | "cash" | "other";
 
+function todayDateString() {
+  return new Date().toISOString().slice(0, 10);
+}
+
 export type PayPayload = {
   paymentVoucherNo: string;
   paymentDate: string;
@@ -46,7 +50,7 @@ export function ReimbursementActions({
 }: ReimbursementActionsProps) {
   const [withdrawComment, setWithdrawComment] = useState("申请撤回并补充说明后重提");
   const [paymentVoucherNo, setPaymentVoucherNo] = useState("");
-  const [paymentDate, setPaymentDate] = useState("2026-02-08");
+  const [paymentDate, setPaymentDate] = useState(todayDateString);
   const [paymentChannel, setPaymentChannel] = useState<PaymentChannel>("bank");
   const [paymentNote, setPaymentNote] = useState("");
   const canShowSubmit = showSubmitAction && ["draft", "rejected"].includes(status);