R62 A1-A6：2026年中国法定假期日历

client/src/api/leave.ts

@@ -83,6 +83,15 @@ export type LeaveBalanceResponse = {
   items: LeaveBalanceItem[];
 };
 
+export type LeaveWorkingDaysPreview = {
+  requestedDays: number;
+  naturalRequestedDays: number;
+  holidayDayCount: number;
+  weekendDayCount: number;
+  adjustedWorkdayCount: number;
+  calendarApplied: boolean;
+};
+
 export type LeaveListQuery = {
   status?: LeaveRequestStatus;
   scope?: "own" | "all";
@@ -164,6 +173,17 @@ export async function fetchLeaveRequestDetail(leaveRequestId: string) {
   return apiRequestData<LeaveRequestItem>(`/api/leave-requests/${leaveRequestId}`);
 }
 
+export async function fetchLeaveWorkingDaysPreview(query: {
+  startDate: string;
+  endDate: string;
+  startSession: LeaveSession;
+  endSession: LeaveSession;
+}) {
+  return apiRequestData<LeaveWorkingDaysPreview>(
+    `/api/leave-requests/working-days${toQueryString(query)}`,
+  );
+}
+
 export async function createLeaveRequest(payload: {
   leaveTypeId: string;
   startDate: string;