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;

client/src/pages/LeaveRequestPage.tsx

@@ -5,6 +5,7 @@ import { mapApiErrorMessage } from "../api/errorMessages";
 import {
   createLeaveRequest,
   fetchLeaveBalances,
+  fetchLeaveWorkingDaysPreview,
   fetchLeaveRequests,
   fetchLeaveTypes,
   patchLeaveRequest,
@@ -221,11 +222,32 @@ export function LeaveRequestPage() {
   const [formError, setFormError] = useState("");
   const [withdrawTarget, setWithdrawTarget] = useState<{ id: string; label: string } | null>(null);
 
-  const requestedDaysPreview = useMemo(
+  const localRequestedDaysPreview = useMemo(
     () => calculateRequestedDaysPreview(startDate, endDate, startSession, endSession),
     [endDate, endSession, startDate, startSession],
   );
 
+  const workingDaysPreviewQuery = useQuery({
+    queryKey: [
+      "leave",
+      "working-days-preview",
+      me?.id ?? "anonymous",
+      startDate,
+      endDate,
+      startSession,
+      endSession,
+    ],
+    enabled: Boolean(startDate && endDate && localRequestedDaysPreview != null),
+    retry: false,
+    queryFn: () =>
+      fetchLeaveWorkingDaysPreview({
+        startDate,
+        endDate,
+        startSession,
+        endSession,
+      }),
+  });
+
   const leaveTypesQuery = useQuery({
     queryKey: ["leave", "types"],
     queryFn: () => fetchLeaveTypes({ enabled: true }),
@@ -279,6 +301,9 @@ export function LeaveRequestPage() {
     return (leaveTypesQuery.data?.items ?? []).find((item) => item.id === leaveTypeId) ?? null;
   }, [leaveTypeId, leaveTypesQuery.data?.items]);
 
+  const effectiveRequestedDaysPreview =
+    workingDaysPreviewQuery.data?.requestedDays ?? localRequestedDaysPreview;
+
   const balanceSummary = useMemo(() => {
     return (balancesQuery.data?.items ?? []).reduce(
       (acc, item) => {
@@ -340,7 +365,7 @@ export function LeaveRequestPage() {
     if (!selectedLeaveType) {
       throw new Error("假期类型不存在或已失效");
     }
-    if (requestedDaysPreview == null || requestedDaysPreview <= 0) {
+    if (effectiveRequestedDaysPreview == null || effectiveRequestedDaysPreview <= 0) {
       throw new Error("请检查开始/结束日期与半天时段");
     }
     if (
@@ -736,7 +761,12 @@ export function LeaveRequestPage() {
         <MetricCard title="可用额度" value={balanceSummary.available.toFixed(1)} note="按当前启用假种汇总" />
         <MetricCard title="已冻结" value={balanceSummary.reserved.toFixed(1)} note="审批中申请会占用额度" tone={balanceSummary.reserved > 0 ? "warning" : "neutral"} />
         <MetricCard title="已使用" value={balanceSummary.used.toFixed(1)} note="通过后计入已使用" />
-        <MetricCard title="本次预估" value={requestedDaysPreview ?? "-"} note="创建草稿前可先预览天数" tone={requestedDaysPreview ? "warning" : "neutral"} />
+        <MetricCard
+          title="本次预估"
+          value={effectiveRequestedDaysPreview ?? "-"}
+          note="创建草稿前可先预览天数"
+          tone={effectiveRequestedDaysPreview ? "warning" : "neutral"}
+        />
       </section>
 
       <div className="page-shell-grid">
@@ -748,6 +778,19 @@ export function LeaveRequestPage() {
               </p>
             ) : null}
 
+            {workingDaysPreviewQuery.isError && startDate && endDate ? (
+              <p className="rounded-lg border border-amber-200 bg-amber-50 px-3 py-2 text-sm text-amber-700">
+                工作日预览失败，提交时将以服务器结果为准
+              </p>
+            ) : null}
+
+            {workingDaysPreviewQuery.data && workingDaysPreviewQuery.data.holidayDayCount > 0 ? (
+              <p className="rounded-lg border border-sky-200 bg-sky-50 px-3 py-2 text-sm text-sky-700">
+                选择的日期范围内包含 {workingDaysPreviewQuery.data.holidayDayCount} 天法定假日，实际请假天数为{" "}
+                {workingDaysPreviewQuery.data.requestedDays} 天
+              </p>
+            ) : null}
+
             <div className="grid gap-4 md:grid-cols-2 xl:grid-cols-3">
               <div className="space-y-2">
                 <Label htmlFor="leave-type">假期类型</Label>
@@ -840,7 +883,7 @@ export function LeaveRequestPage() {
 
             <div className="flex flex-wrap items-center justify-between gap-3 rounded-lg border border-zinc-200 bg-zinc-50 px-4 py-3 text-sm text-zinc-700">
               <div>
-                预计请假天数：<span className="font-semibold text-zinc-900">{requestedDaysPreview ?? "-"}</span>
+                预计请假天数：<span className="font-semibold text-zinc-900">{effectiveRequestedDaysPreview ?? "-"}</span>
               </div>
               <div className="flex flex-wrap gap-2">
                 {editingLeaveRequest ? (

deploy/trialrun/.env.example

@@ -101,7 +101,7 @@ TENCENT_OCR_REGION=ap-beijing
 
 # ===== 验真 / 发票 / 节假日 =====
 INVOICE_VERIFICATION_ENABLED=false
-LEAVE_HOLIDAY_CALENDAR_ENABLED=false
+LEAVE_HOLIDAY_CALENDAR_ENABLED=true
 VERIFICATION_PROVIDER=mock
 VERIFICATION_POLL_CRON=* * * * *
 VERIFICATION_MAX_ATTEMPTS=3

issues/2026-04-12_r62-holiday-calendar.csv

@@ -0,0 +1,7 @@
+ID,Title,Description,Acceptance,Test_Method,Tools,Dev_Status,Review1_Status,Regression_Status,Files,Dependencies,Notes
+"A1","R62 执行合同建档与范围冻结","创建并校验 R62 2026 年中国法定假期日历执行合同 CSV，冻结范围：1) seed-config 幂等灌入 2026 官方假期日历；2) leave_holiday_calendar 默认开启；3) 请假表单增加工作日预览提示；4) reviewer/QA 收口。不新增 Prisma 迁移。","issues/2026-04-12_r62-holiday-calendar.csv 列完整、Dependencies 为 JSON 数组字符串，A2-A6 范围与当前方案一致；明确 2026 假期按国务院正式通知、总计 39 条日期记录。","命令：python3 /home/shunli/.codex/skills/plan/scripts/validate_issues_csv.py issues/2026-04-12_r62-holiday-calendar.csv。检查：1) 对照 AGENTS.md 确认 12 列完整；2) A2-A6 依赖链合理；3) Notes 明确无迁移与回滚路径。","manual","DONE","DONE","DONE","issues/2026-04-12_r62-holiday-calendar.csv","[]","回滚路径：删除本次 CSV 不影响业务。官方口径采用国务院办公厅 2026 节假日安排，修正原需求中的错误日期与错误总数。"
+"A2","seed-config 补齐 2026 官方假期日历与默认法体绑定","在 server/src/scripts/seed-config.js 中新增 `CN_2026_STD` 正式日历及 39 条官方日期（33 holiday + 6 adjusted_workday），并以幂等更新方式写入；若存在启用且未归档的法体，则按 created_at 升序取首个，在其 default_holiday_calendar_id 为空时绑定默认日历。","1) seed-config 重复执行不会重复插入，且 `CN_2026_STD` 始终收敛到官方 2026 数据；2) 日历头信息为 `2026年中国法定节假日 / Asia/Shanghai`；3) `seed-dev.js` 演示数据不改；4) 首个启用法体在无默认日历时被绑定。","命令：export PATH=/home/shunli/.nvm/versions/node/v22.20.0/bin:$PATH && cd server && node --check src/scripts/seed-config.js。业务：执行 seed-config 后检查 `CN_2026_STD` 存在且日期数为 39，首个启用法体在原无默认日历时已绑定。","manual","DONE","DONE","DONE","server/src/scripts/seed-config.js","[""A1""]","回滚路径：移除 seed-config 中的 2026 假期日历 helper 与调用。无 Prisma 迁移。"
+"A3","启用 leave_holiday_calendar 默认开关与环境示例","将 deploy/trialrun/.env.example 中 `LEAVE_HOLIDAY_CALENDAR_ENABLED` 改为 true，并把 seed-config 里的 `leave_holiday_calendar` 默认记录调整为 `force_on`；同时补回归验证，确认 attendance 免打卡仍直接读取法体默认日历，不依赖该 flag。","1) trialrun `.env.example` 默认打开 `LEAVE_HOLIDAY_CALENDAR_ENABLED=true`；2) seed-config 执行后 `leave_holiday_calendar` 记录存在且 `override_mode=force_on`；3) attendance 行为不回归。","命令：export PATH=/home/shunli/.nvm/versions/node/v22.20.0/bin:$PATH && cd server && node --check src/scripts/seed-config.js && node --check src/services/attendance.js。业务：检查 feature flag 与 env 示例均已开启，并确认考勤节假日免打卡逻辑不依赖 leave 开关。","manual","DONE","DONE","DONE","server/src/scripts/seed-config.js|deploy/trialrun/.env.example|server/tests/unit/routes/attendance.test.js","[""A2""]","回滚路径：恢复 `.env.example` 和 seed-config 默认开关为关闭态。"
+"A4","请假工作日预览接口与表单法定假日提示","在 server/src/routes/leave.js 新增 `GET /api/leave-requests/working-days` 轻量预览接口，按当前登录员工法体默认日历返回 requestedDays/naturalRequestedDays/holidayDayCount/weekendDayCount/adjustedWorkdayCount/calendarApplied；前端 LeaveRequestPage 改为输入完整区间后调用预览接口，并在包含法定假日时显示提示。","1) 预览接口支持 startDate/endDate/startSession/endSession，复用与创建/编辑一致的工作日计算逻辑；2) 返回字段固定且半天场景正确；3) LeaveRequestPage 优先显示后端 requestedDays；4) `holidayDayCount > 0` 时展示“包含 X 天法定假日，实际请假天数为 Y 天”；5) 预览失败时表单保留编辑能力并提示将以后端结果为准。","命令：export PATH=/home/shunli/.nvm/versions/node/v22.20.0/bin:$PATH && cd server && node --check src/routes/leave.js && cd ../client && npm run typecheck && npm run build。业务：1) 在请假页选择 2026-10-01~2026-10-07 显示法定假日提示且预估天数非自然日 7 天；2) 选择 2026-10-10 因为是 adjusted_workday，预估按工作日处理；3) 半天请假预览正确。","manual","DONE","DONE","DONE","server/src/routes/leave.js|server/src/services/leave.js|server/tests/unit/services/leave.test.js|server/tests/unit/routes/leave.working-days.test.js|client/src/api/leave.ts|client/src/pages/LeaveRequestPage.tsx","[""A2"",""A3""]","回滚路径：移除 working-days 预览接口与前端提示，恢复纯前端自然日预估。"
+"A5","Reviewer 复核官方日期、幂等 seed 与考勤口径","复核 2026 官方日期总数、seed-config 幂等更新策略、attendance 对假期日历的独立依赖，以及请假预览与创建/编辑共用工作日计算逻辑。","1) 官方日期为 33 holiday + 6 adjusted_workday；2) 重复执行 seed-config 后 `CN_2026_STD` 仍为官方数据；3) attendance 不受 leave_holiday_calendar 限制；4) working-days 预览与创建/编辑口径一致。","Review：检查 seed-config、leave service/route、attendance tests 和前端请假页变更；必要时手工验证跨节假日请假与调休上班日预估。","manual","DONE","DONE","DONE","server/src/scripts/seed-config.js|server/src/services/leave.js|server/src/routes/leave.js|server/tests/unit/services/leave.test.js|server/tests/unit/routes/leave.working-days.test.js|server/tests/unit/routes/attendance.test.js|client/src/pages/LeaveRequestPage.tsx","[""A2"",""A3"",""A4""]","回滚路径：若 reviewer 发现关键日期错误或口径分叉，暂停提交并回退对应代码。"
+"A6","QA、状态回填与提交收口","执行 R62 post-check 与手工验证，回填 CSV 状态并完成提交收口。","语法检查、类型检查、构建与新增/扩展单测通过；请假预览和 2026 假期 seed 生效；issues/2026-04-12_r62-holiday-calendar.csv 三列状态按结果回填。","命令：python3 /home/shunli/.codex/skills/plan/scripts/validate_issues_csv.py issues/2026-04-12_r62-holiday-calendar.csv && export PATH=/home/shunli/.nvm/versions/node/v22.20.0/bin:$PATH && cd server && node --check src/scripts/seed-config.js && node --check src/routes/leave.js && node --check src/services/attendance.js && npm test -- tests/unit/services/leave.test.js tests/unit/routes/leave.working-days.test.js tests/unit/routes/attendance.test.js && cd ../client && npm run typecheck && npm run build。业务：1) seed-config 后 `CN_2026_STD` 日期数为 39；2) 请假页跨法定假期显示提示；3) 调休上班日预估为工作日。","manual","DONE","DONE","DONE","issues/2026-04-12_r62-holiday-calendar.csv|server/src/scripts/seed-config.js|server/src/routes/leave.js|server/src/services/leave.js|server/tests/unit/services/leave.test.js|server/tests/unit/routes/leave.working-days.test.js|server/tests/unit/routes/attendance.test.js|client/src/api/leave.ts|client/src/pages/LeaveRequestPage.tsx|deploy/trialrun/.env.example","[""A5""]","回滚路径：若 post-check 或手工验证失败，暂停提交并回退 R62 代码。commit message：R62 A1-A6：2026年中国法定假期日历。"

server/src/routes/leave.js

@@ -8,7 +8,7 @@ const { ensureCutoverAllowed } = require("../services/cutover");
 const {
   DEFAULT_ATTACHMENT_MIME_TYPES,
   calculateRequestedDays,
-  calculateRequestedDaysByWorkingCalendar,
+  calculateRequestedDaysPreviewByWorkingCalendar,
   createLeaveLedgerEntry,
   formatDateOnly,
   leaveRangesOverlap,
@@ -37,6 +37,13 @@ const createLeaveSchema = z
   })
   .strict();
 
+const workingDaysPreviewQuerySchema = z.object({
+  startDate: DATE_ONLY_SCHEMA,
+  endDate: DATE_ONLY_SCHEMA,
+  startSession: SESSION_SCHEMA,
+  endSession: SESSION_SCHEMA,
+});
+
 const leaveListQuerySchema = z.object({
   status: STATUS_SCHEMA.optional(),
   scope: z.enum(["own", "all"]).optional(),
@@ -189,9 +196,49 @@ function parseCreateBody(body) {
   };
 }
 
-async function resolveRequestedDaysForCreate(fastify, employee, body) {
+function parseWorkingDaysPreviewQuery(query) {
+  const parsed = workingDaysPreviewQuerySchema.safeParse(query ?? {});
+  if (!parsed.success) {
+    throw buildValidationError(parsed.error.flatten());
+  }
+
+  const startDate = new Date(`${parsed.data.startDate}T00:00:00.000Z`);
+  const endDate = new Date(`${parsed.data.endDate}T00:00:00.000Z`);
+
+  if (Number.isNaN(startDate.getTime()) || Number.isNaN(endDate.getTime())) {
+    throw buildValidationError({ date: "invalid" });
+  }
+
+  const requestedDays = calculateRequestedDays({
+    startDate,
+    endDate,
+    startSession: parsed.data.startSession,
+    endSession: parsed.data.endSession,
+  });
+
+  return {
+    startDate,
+    endDate,
+    startSession: parsed.data.startSession,
+    endSession: parsed.data.endSession,
+    requestedDays,
+  };
+}
+
+function buildNaturalWorkingDaysPreview(body) {
+  return {
+    requestedDays: body.requestedDays,
+    naturalRequestedDays: body.requestedDays,
+    holidayDayCount: 0,
+    weekendDayCount: 0,
+    adjustedWorkdayCount: 0,
+    calendarApplied: false,
+  };
+}
+
+async function resolveWorkingDaysPreview(fastify, employee, body) {
   if (!employee?.legal_entity_id) {
-    return body.requestedDays;
+    return buildNaturalWorkingDaysPreview(body);
   }
 
   const featureFlag = await evaluateFeatureFlag({
@@ -203,7 +250,7 @@ async function resolveRequestedDaysForCreate(fastify, employee, body) {
   });
 
   if (!featureFlag.enabled) {
-    return body.requestedDays;
+    return buildNaturalWorkingDaysPreview(body);
   }
 
   const legalEntity = await fastify.prisma.legalEntity.findUnique({
@@ -232,10 +279,10 @@ async function resolveRequestedDaysForCreate(fastify, employee, body) {
 
   const calendar = legalEntity?.default_holiday_calendar;
   if (!calendar || calendar.archived_at) {
-    return body.requestedDays;
+    return buildNaturalWorkingDaysPreview(body);
   }
 
-  return calculateRequestedDaysByWorkingCalendar({
+  return calculateRequestedDaysPreviewByWorkingCalendar({
     startDate: body.startDate,
     endDate: body.endDate,
     startSession: body.startSession,
@@ -244,6 +291,11 @@ async function resolveRequestedDaysForCreate(fastify, employee, body) {
   });
 }
 
+async function resolveRequestedDaysForCreate(fastify, employee, body) {
+  const preview = await resolveWorkingDaysPreview(fastify, employee, body);
+  return preview.requestedDays;
+}
+
 async function collectCreatePayload(request) {
   if (typeof request.isMultipart === "function" && request.isMultipart()) {
     const fields = {};
@@ -519,6 +571,20 @@ async function leaveRoutes(fastify) {
     },
   );
 
+  fastify.get(
+    "/leave-requests/working-days",
+    {
+      schema: { tags: ["Leave"], summary: "Preview Leave Working Days" },
+      preHandler: fastify.authenticate,
+    },
+    async (request, reply) => {
+      const query = parseWorkingDaysPreviewQuery(request.query);
+      const preview = await resolveWorkingDaysPreview(fastify, request.employee, query);
+
+      return sendData(reply, request, preview);
+    },
+  );
+
   fastify.post(
     "/leave-requests",
     {

server/src/scripts/seed-config.js

@@ -228,10 +228,10 @@ const DEFAULT_FEATURE_FLAGS = [
   },
   {
     flag_key: "leave_holiday_calendar",
-    override_mode: "force_off",
+    override_mode: "force_on",
     rollout_type: "global",
     department_ids: [],
-    note: "bootstrap default: force_off",
+    note: "bootstrap default: force_on",
   },
   {
     flag_key: "budget_precheck_v1",
@@ -419,6 +419,53 @@ const DEFAULT_LEAVE_TYPES = [
   },
 ];
 
+const OFFICIAL_2026_HOLIDAY_CALENDAR = {
+  code: "CN_2026_STD",
+  name: "2026年中国法定节假日",
+  timezone: "Asia/Shanghai",
+  days: [
+    { date: "2026-01-01", dayType: "holiday", name: "元旦" },
+    { date: "2026-01-02", dayType: "holiday", name: "元旦假期" },
+    { date: "2026-01-03", dayType: "holiday", name: "元旦假期" },
+    { date: "2026-01-04", dayType: "adjusted_workday", name: "元旦调休补班" },
+    { date: "2026-02-14", dayType: "adjusted_workday", name: "春节调休补班" },
+    { date: "2026-02-15", dayType: "holiday", name: "春节" },
+    { date: "2026-02-16", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-17", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-18", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-19", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-20", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-21", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-22", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-23", dayType: "holiday", name: "春节假期" },
+    { date: "2026-02-28", dayType: "adjusted_workday", name: "春节调休补班" },
+    { date: "2026-04-04", dayType: "holiday", name: "清明节" },
+    { date: "2026-04-05", dayType: "holiday", name: "清明节假期" },
+    { date: "2026-04-06", dayType: "holiday", name: "清明节假期" },
+    { date: "2026-05-01", dayType: "holiday", name: "劳动节" },
+    { date: "2026-05-02", dayType: "holiday", name: "劳动节假期" },
+    { date: "2026-05-03", dayType: "holiday", name: "劳动节假期" },
+    { date: "2026-05-04", dayType: "holiday", name: "劳动节假期" },
+    { date: "2026-05-05", dayType: "holiday", name: "劳动节假期" },
+    { date: "2026-05-09", dayType: "adjusted_workday", name: "劳动节调休补班" },
+    { date: "2026-06-19", dayType: "holiday", name: "端午节" },
+    { date: "2026-06-20", dayType: "holiday", name: "端午节假期" },
+    { date: "2026-06-21", dayType: "holiday", name: "端午节假期" },
+    { date: "2026-09-20", dayType: "adjusted_workday", name: "国庆节调休补班" },
+    { date: "2026-09-25", dayType: "holiday", name: "中秋节" },
+    { date: "2026-09-26", dayType: "holiday", name: "中秋节假期" },
+    { date: "2026-09-27", dayType: "holiday", name: "中秋节假期" },
+    { date: "2026-10-01", dayType: "holiday", name: "国庆节" },
+    { date: "2026-10-02", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-03", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-04", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-05", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-06", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-07", dayType: "holiday", name: "国庆节假期" },
+    { date: "2026-10-10", dayType: "adjusted_workday", name: "国庆节调休补班" },
+  ],
+};
+
 async function seedExpenseTypes(prisma) {
   const now = new Date();
   const allTypes = [
@@ -559,6 +606,94 @@ async function seedFeatureFlags(prisma) {
   }
 }
 
+async function seedOfficialHolidayCalendar(prisma) {
+  const now = new Date();
+  const existing = await prisma.holidayCalendar.findUnique({
+    where: { code: OFFICIAL_2026_HOLIDAY_CALENDAR.code },
+    select: { id: true },
+  });
+
+  const calendar = existing
+    ? await prisma.holidayCalendar.update({
+        where: { id: existing.id },
+        data: {
+          name: OFFICIAL_2026_HOLIDAY_CALENDAR.name,
+          timezone: OFFICIAL_2026_HOLIDAY_CALENDAR.timezone,
+          legal_entity_id: null,
+          enabled: true,
+          archived_at: null,
+          updated_at: now,
+          updated_by: null,
+        },
+      })
+    : await prisma.holidayCalendar.create({
+        data: {
+          code: OFFICIAL_2026_HOLIDAY_CALENDAR.code,
+          name: OFFICIAL_2026_HOLIDAY_CALENDAR.name,
+          timezone: OFFICIAL_2026_HOLIDAY_CALENDAR.timezone,
+          legal_entity_id: null,
+          enabled: true,
+          archived_at: null,
+          created_at: now,
+          created_by: null,
+          updated_at: now,
+          updated_by: null,
+        },
+      });
+
+  await prisma.holidayCalendarDay.deleteMany({
+    where: { calendar_id: calendar.id },
+  });
+
+  await prisma.holidayCalendarDay.createMany({
+    data: OFFICIAL_2026_HOLIDAY_CALENDAR.days.map((item) => ({
+      calendar_id: calendar.id,
+      date: new Date(`${item.date}T00:00:00.000Z`),
+      day_type: item.dayType,
+      name: item.name,
+      note: null,
+      created_at: now,
+      created_by: null,
+      updated_at: now,
+      updated_by: null,
+    })),
+  });
+
+  const defaultLegalEntity = await prisma.legalEntity.findFirst({
+    where: {
+      enabled: true,
+      archived_at: null,
+    },
+    orderBy: {
+      created_at: "asc",
+    },
+    select: {
+      id: true,
+      default_holiday_calendar_id: true,
+    },
+  });
+
+  if (defaultLegalEntity && !defaultLegalEntity.default_holiday_calendar_id) {
+    await prisma.legalEntity.update({
+      where: { id: defaultLegalEntity.id },
+      data: {
+        default_holiday_calendar_id: calendar.id,
+        updated_at: now,
+        updated_by: null,
+      },
+    });
+  }
+
+  return {
+    calendar,
+    dayCount: OFFICIAL_2026_HOLIDAY_CALENDAR.days.length,
+    boundLegalEntityId:
+      defaultLegalEntity && !defaultLegalEntity.default_holiday_calendar_id
+        ? defaultLegalEntity.id
+        : null,
+  };
+}
+
 async function seedAttendancePolicy(prisma) {
   const now = new Date();
   const current = await prisma.attendancePolicy.findFirst({
@@ -840,6 +975,7 @@ async function main() {
     await seedWorkflowDefinition(prisma);
     await seedLeaveTypes(prisma);
     await seedFeatureFlags(prisma);
+    const holidayCalendarSeed = await seedOfficialHolidayCalendar(prisma);
     await seedAttendancePolicy(prisma);
     await seedBudgetControlRules(prisma);
 
@@ -866,6 +1002,14 @@ async function main() {
     // eslint-disable-next-line no-console
     console.log(`- feature flags: ${DEFAULT_FEATURE_FLAGS.length} seeded`);
     // eslint-disable-next-line no-console
+    console.log(
+      `- holiday calendar: ${holidayCalendarSeed.calendar.code} / ${holidayCalendarSeed.dayCount} days seeded${
+        holidayCalendarSeed.boundLegalEntityId
+          ? ` / bound legal entity ${holidayCalendarSeed.boundLegalEntityId}`
+          : ""
+      }`,
+    );
+    // eslint-disable-next-line no-console
     console.log("- attendance policy: default 09:00-18:00 seeded");
   } finally {
     await prisma.$disconnect();

server/src/services/leave.js

@@ -134,46 +134,71 @@ function countHalfDayUnitsForDate({ date, startDate, endDate, startSession, endS
   return 2;
 }
 
-function calculateRequestedDaysByWorkingCalendar({
+function calculateRequestedDaysPreviewByWorkingCalendar({
   startDate,
   endDate,
   startSession,
   endSession,
   calendarDays = [],
 }) {
-  const startSlot = toHalfDaySlot(startDate, startSession);
-  const endSlot = toHalfDaySlot(endDate, endSession);
-
-  if (endSlot < startSlot) {
-    throw buildLeaveValidationError({ leave: "invalid_range" });
-  }
+  const naturalRequestedDays = calculateRequestedDays({
+    startDate,
+    endDate,
+    startSession,
+    endSession,
+  });
 
   const calendarDayMap = buildHolidayCalendarDayMap(calendarDays);
   const current = normalizeDateOnly(startDate);
   const finalDate = normalizeDateOnly(endDate);
   let cursor = current;
-  let totalUnits = 0;
+  let requestedUnits = 0;
+  let holidayUnits = 0;
+  let weekendUnits = 0;
+  let adjustedWorkdayUnits = 0;
 
   while (cursor.getTime() <= finalDate.getTime()) {
-    if (isWorkingDateByCalendar(cursor, calendarDayMap)) {
-      totalUnits += countHalfDayUnitsForDate({
-        date: cursor,
-        startDate,
-        endDate,
-        startSession,
-        endSession,
-      });
+    const units = countHalfDayUnitsForDate({
+      date: cursor,
+      startDate,
+      endDate,
+      startSession,
+      endSession,
+    });
+    const dateKey = formatDateOnly(cursor);
+    const configuredType = calendarDayMap.get(dateKey) ?? null;
+
+    if (configuredType === "holiday") {
+      holidayUnits += units;
+    } else if (!isWorkingDateByCalendar(cursor, calendarDayMap)) {
+      weekendUnits += units;
+    } else {
+      requestedUnits += units;
+      if (configuredType === "adjusted_workday") {
+        adjustedWorkdayUnits += units;
+      }
     }
 
     cursor = new Date(`${formatDateOnly(cursor)}T00:00:00.000Z`);
     cursor.setUTCDate(cursor.getUTCDate() + 1);
   }
 
-  if (totalUnits <= 0) {
+  if (requestedUnits <= 0) {
     throw buildLeaveValidationError({ leave: "non_working_range" });
   }
 
-  return fromHalfDayUnits(totalUnits);
+  return {
+    requestedDays: fromHalfDayUnits(requestedUnits),
+    naturalRequestedDays,
+    holidayDayCount: fromHalfDayUnits(holidayUnits),
+    weekendDayCount: fromHalfDayUnits(weekendUnits),
+    adjustedWorkdayCount: fromHalfDayUnits(adjustedWorkdayUnits),
+    calendarApplied: true,
+  };
+}
+
+function calculateRequestedDaysByWorkingCalendar(input) {
+  return calculateRequestedDaysPreviewByWorkingCalendar(input).requestedDays;
 }
 
 function leaveRangesOverlap(left, right) {
@@ -573,6 +598,7 @@ module.exports = {
   DEFAULT_ATTACHMENT_MIME_TYPES,
   calculateRequestedDays,
   calculateRequestedDaysByWorkingCalendar,
+  calculateRequestedDaysPreviewByWorkingCalendar,
   createLeaveLedgerEntry,
   consumeReservedLeave,
   currentLeavePeriod,

server/tests/unit/routes/attendance.test.js

@@ -279,6 +279,7 @@ async function buildApp(options = {}) {
   app.decorate("config", {
     appTimezone: "Asia/Shanghai",
     attendanceEnabled: true,
+    leaveHolidayCalendarEnabled: false,
   });
   app.decorate("prisma", {
     employee: {
@@ -497,6 +498,66 @@ describe("attendance routes", () => {
 
   });
 
+  it("treats configured legal holidays as no-need-clock-in even when leave holiday flag is off", async () => {
+    vi.setSystemTime(new Date("2026-05-01T01:00:00.000Z"));
+    const { app } = await buildApp({
+      legalEntities: [
+        buildLegalEntityRow({
+          default_holiday_calendar: {
+            id: "calendar-1",
+            archived_at: null,
+            days: [{ date: new Date("2026-05-01T00:00:00.000Z"), day_type: "holiday" }],
+          },
+        }),
+      ],
+    });
+    currentApp = app;
+
+    const response = await app.inject({
+      method: "GET",
+      url: "/api/attendance/me/today",
+    });
+
+    expect(response.statusCode).toBe(200);
+    expect(response.json().data).toMatchObject({
+      workDate: "2026-05-01",
+      needClockIn: false,
+      exemptionReason: "holiday",
+      item: null,
+    });
+
+  });
+
+  it("treats adjusted workdays as working days even on weekends", async () => {
+    vi.setSystemTime(new Date("2026-01-04T01:00:00.000Z"));
+    const { app } = await buildApp({
+      legalEntities: [
+        buildLegalEntityRow({
+          default_holiday_calendar: {
+            id: "calendar-1",
+            archived_at: null,
+            days: [{ date: new Date("2026-01-04T00:00:00.000Z"), day_type: "adjusted_workday" }],
+          },
+        }),
+      ],
+    });
+    currentApp = app;
+
+    const response = await app.inject({
+      method: "GET",
+      url: "/api/attendance/me/today",
+    });
+
+    expect(response.statusCode).toBe(200);
+    expect(response.json().data).toMatchObject({
+      workDate: "2026-01-04",
+      needClockIn: true,
+      exemptionReason: null,
+      item: null,
+    });
+
+  });
+
   it("builds month summary without counting approved leave as missed", async () => {
     vi.setSystemTime(new Date("2026-04-15T01:00:00.000Z"));
     const { app } = await buildApp({

server/tests/unit/routes/leave.working-days.test.js

@@ -0,0 +1,191 @@
+const Fastify = require("fastify");
+
+const { AppError } = require("../../../src/utils/AppError");
+const leaveRoutes = require("../../../src/routes/leave");
+
+function buildFlagRecord(overrides = {}) {
+  return {
+    id: "flag-1",
+    flag_key: "leave_holiday_calendar",
+    override_mode: "force_on",
+    rollout_type: "global",
+    department_ids: [],
+    note: "",
+    version: 1,
+    created_at: new Date("2026-04-01T00:00:00.000Z"),
+    created_by: null,
+    updated_at: new Date("2026-04-01T00:00:00.000Z"),
+    updated_by: null,
+    ...overrides,
+  };
+}
+
+function buildCalendarDay(date, dayType) {
+  return {
+    date: new Date(`${date}T00:00:00.000Z`),
+    day_type: dayType,
+  };
+}
+
+function buildLegalEntity(overrides = {}) {
+  return {
+    id: "legal-entity-1",
+    default_holiday_calendar: {
+      id: "calendar-1",
+      archived_at: null,
+      days: [
+        buildCalendarDay("2026-01-01", "holiday"),
+        buildCalendarDay("2026-01-02", "holiday"),
+        buildCalendarDay("2026-01-03", "holiday"),
+        buildCalendarDay("2026-01-04", "adjusted_workday"),
+      ],
+    },
+    ...overrides,
+  };
+}
+
+async function buildApp(options = {}) {
+  const app = Fastify();
+  const employee = options.employee ?? {
+    id: "employee-1",
+    department_id: "department-1",
+    legal_entity_id: "legal-entity-1",
+    permissionCodes: [],
+  };
+
+  const featureFlagFindUnique = vi
+    .fn()
+    .mockResolvedValue(options.featureFlagRecord ?? buildFlagRecord());
+  const legalEntityFindUnique = vi
+    .fn()
+    .mockResolvedValue(options.legalEntity ?? buildLegalEntity());
+
+  app.decorate("prisma", {
+    featureFlag: {
+      findUnique: featureFlagFindUnique,
+    },
+    legalEntity: {
+      findUnique: legalEntityFindUnique,
+    },
+  });
+  app.decorate("config", {
+    cutoverConsoleEnabled: false,
+    leaveHolidayCalendarEnabled:
+      options.leaveHolidayCalendarEnabled === undefined
+        ? true
+        : options.leaveHolidayCalendarEnabled,
+  });
+  app.decorate("authenticate", async (request) => {
+    if (!request.headers.authorization) {
+      throw new AppError({
+        code: "AUTH_001",
+        message: "未登录",
+        statusCode: 401,
+      });
+    }
+
+    request.employee = employee;
+  });
+  app.decorate("hasPermission", () => false);
+  app.decorate("requireEntityPermission", () => async (request) => {
+    await app.authenticate(request);
+  });
+
+  app.setErrorHandler((error, request, reply) => {
+    if (error instanceof AppError) {
+      return reply.status(error.statusCode).send({
+        requestId: request.id,
+        error: {
+          code: error.code,
+          message: error.message,
+          details: error.details ?? {},
+        },
+      });
+    }
+
+    return reply.status(500).send({
+      requestId: request.id,
+      error: { code: "SYS_001", message: "服务器内部错误", details: {} },
+    });
+  });
+
+  await app.register(leaveRoutes, { prefix: "/api" });
+
+  return {
+    app,
+    featureFlagFindUnique,
+    legalEntityFindUnique,
+  };
+}
+
+describe("leave working-days route", () => {
+  it("returns preview fields and counts for ranges that include official holidays", async () => {
+    const { app } = await buildApp();
+
+    const response = await app.inject({
+      method: "GET",
+      url: "/api/leave-requests/working-days?startDate=2026-01-01&endDate=2026-01-04&startSession=am&endSession=pm",
+      headers: { authorization: "Bearer test" },
+    });
+
+    expect(response.statusCode).toBe(200);
+    expect(response.json().data).toEqual({
+      requestedDays: 1,
+      naturalRequestedDays: 4,
+      holidayDayCount: 3,
+      weekendDayCount: 0,
+      adjustedWorkdayCount: 1,
+      calendarApplied: true,
+    });
+
+    await app.close();
+  });
+
+  it("keeps half-day precision in preview results", async () => {
+    const { app } = await buildApp();
+
+    const response = await app.inject({
+      method: "GET",
+      url: "/api/leave-requests/working-days?startDate=2026-01-03&endDate=2026-01-04&startSession=pm&endSession=am",
+      headers: { authorization: "Bearer test" },
+    });
+
+    expect(response.statusCode).toBe(200);
+    expect(response.json().data).toEqual({
+      requestedDays: 0.5,
+      naturalRequestedDays: 1,
+      holidayDayCount: 0.5,
+      weekendDayCount: 0,
+      adjustedWorkdayCount: 0.5,
+      calendarApplied: true,
+    });
+
+    await app.close();
+  });
+
+  it("falls back to natural days when the holiday-calendar feature is disabled", async () => {
+    const { app, featureFlagFindUnique, legalEntityFindUnique } = await buildApp({
+      leaveHolidayCalendarEnabled: false,
+    });
+
+    const response = await app.inject({
+      method: "GET",
+      url: "/api/leave-requests/working-days?startDate=2026-01-01&endDate=2026-01-04&startSession=am&endSession=pm",
+      headers: { authorization: "Bearer test" },
+    });
+
+    expect(response.statusCode).toBe(200);
+    expect(response.json().data).toEqual({
+      requestedDays: 4,
+      naturalRequestedDays: 4,
+      holidayDayCount: 0,
+      weekendDayCount: 0,
+      adjustedWorkdayCount: 0,
+      calendarApplied: false,
+    });
+    expect(featureFlagFindUnique).not.toHaveBeenCalled();
+    expect(legalEntityFindUnique).not.toHaveBeenCalled();
+
+    await app.close();
+  });
+});

server/tests/unit/services/leave.test.js

@@ -1,6 +1,7 @@
 const {
   calculateRequestedDays,
   calculateRequestedDaysByWorkingCalendar,
+  calculateRequestedDaysPreviewByWorkingCalendar,
   leaveRangesOverlap,
   summarizeLeaveLedgerEntries,
 } = require("../../../src/services/leave");
@@ -98,6 +99,54 @@ describe("Leave Service", () => {
     });
   });
 
+  describe("calculateRequestedDaysPreviewByWorkingCalendar", () => {
+    it("returns official holiday counts while excluding holidays from requested days", () => {
+      expect(
+        calculateRequestedDaysPreviewByWorkingCalendar({
+          startDate: "2026-01-01",
+          endDate: "2026-01-04",
+          startSession: "am",
+          endSession: "pm",
+          calendarDays: [
+            { date: "2026-01-01", day_type: "holiday" },
+            { date: "2026-01-02", day_type: "holiday" },
+            { date: "2026-01-03", day_type: "holiday" },
+            { date: "2026-01-04", day_type: "adjusted_workday" },
+          ],
+        }),
+      ).toEqual({
+        requestedDays: 1,
+        naturalRequestedDays: 4,
+        holidayDayCount: 3,
+        weekendDayCount: 0,
+        adjustedWorkdayCount: 1,
+        calendarApplied: true,
+      });
+    });
+
+    it("keeps half-day precision for adjusted workdays in preview payload", () => {
+      expect(
+        calculateRequestedDaysPreviewByWorkingCalendar({
+          startDate: "2026-01-03",
+          endDate: "2026-01-04",
+          startSession: "pm",
+          endSession: "am",
+          calendarDays: [
+            { date: "2026-01-03", day_type: "holiday" },
+            { date: "2026-01-04", day_type: "adjusted_workday" },
+          ],
+        }),
+      ).toEqual({
+        requestedDays: 0.5,
+        naturalRequestedDays: 1,
+        holidayDayCount: 0.5,
+        weekendDayCount: 0,
+        adjustedWorkdayCount: 0.5,
+        calendarApplied: true,
+      });
+    });
+  });
+
   describe("leaveRangesOverlap", () => {
     it("detects overlapping half-day ranges", () => {
       expect(