feat: 节假日配置、排班管理独立页面、考勤加班显示优化

- 新增 HolidayConfig 模型，支持法定节假日和调休工作日配置
- 加班费同步逻辑改用 HolidayConfig 判断日期类型
- 员工端考勤显示加班工时、费率和日期类型
- 周末/节假日出勤状态显示为"周末出勤"/"节假日出勤"
- 新增 Employee.defaultShiftId 字段，支持长期排班（工作日班次）
- 排班管理拆分为独立页面（班次管理+排班），考勤管理保留出勤相关功能
- 排班和每日出勤页面增加身份证号列
- 修复岗位和部门编辑失败问题（POST 改 PUT）
- 新增 backfill 脚本：合同薪资回填、默认班次回填

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

backend/src/services/contract.service.ts

@@ -401,6 +401,8 @@ export async function createEmployee(orgId: string, userId: string, data: any) {
     // 默认密码：手机号后6位（员工可在员工端自行修改）
     const defaultPassword = data.phone ? data.phone.slice(-6) : '123456'
     const passwordHash = await bcrypt.hash(defaultPassword, 10)
+    // 查找该组织的第一个班次作为默认排班（长期=工作日班次）
+    const firstShift = await tx.shift.findFirst({ where: { orgId }, orderBy: { createdAt: 'asc' } })
     const emp = await tx.employee.create({
       data: {
         orgId,
@@ -420,6 +422,7 @@ export async function createEmployee(orgId: string, userId: string, data: any) {
         isPregnant: data.isPregnant || false,
         isInMedicalPeriod: data.isInMedicalPeriod || false,
         isWorkInjured: data.isWorkInjured || false,
+        defaultShiftId: firstShift?.id || null,
         socialInsBase,
         housingFundBase,
         socialInsStartMonth,
@@ -1027,6 +1030,25 @@ export async function addContract(orgId: string, userId: string, data: any) {
     throw { code: 'DUPLICATE', message: '该员工已存在相同日期的合同，请勿重复添加' }
   }
 
+  // 工资结构：baseSalary 为 0 时，用员工档案月工资填充
+  let contractBase = Number(data.baseSalary) || 0
+  let contractPerf = Number(data.performanceSalary) || 0
+  if (contractBase === 0 && contractPerf === 0) {
+    const emp = await prisma.employee.findFirst({
+      where: { id: data.employeeId, orgId },
+      select: { monthlySalary: true, baseSalary: true, performanceSalary: true },
+    })
+    if (emp) {
+      try {
+        contractBase = emp.baseSalary ? Number(decrypt(emp.baseSalary)) || 0 : 0
+        contractPerf = emp.performanceSalary ? Number(decrypt(emp.performanceSalary)) || 0 : 0
+      } catch {}
+      if (contractBase === 0 && contractPerf === 0) {
+        try { contractBase = Number(decrypt(emp.monthlySalary)) || 0 } catch {}
+      }
+    }
+  }
+
   const contractMonths = data.endDate
     ? Math.ceil(daysBetween(new Date(data.endDate), new Date(data.startDate)) / 30.44)
     : data.contractYears * 12
@@ -1048,8 +1070,8 @@ export async function addContract(orgId: string, userId: string, data: any) {
       contractYears: data.contractYears || 3,
       probationMonths: data.probationMonths || 0,
       probationSalary: data.probationSalary || 0,
-      baseSalary: data.baseSalary || 0,
-      performanceSalary: data.performanceSalary || 0,
+      baseSalary: contractBase,
+      performanceSalary: contractPerf,
       attachmentName: data.attachmentUrl ? '合同扫描件' : null,
       attachmentUrl: data.attachmentUrl || null,
       electronicContractNo: data.electronicContractNo || null,