feat: 20260809 系统优化 - 全部28项问题修复(P0×6+P1×16+P2×6)

P0: 福利批量参保/离职证明下载防乱码/考勤模板合并Sheet/补卡修改/附件在线查看删除
P1: 分页pageSize修复/离职导出筛选/撤回删除草稿/加班费自动计算/考勤加班汇总/证据链异常详情/制度催办/模板导入Word/社保封顶保底/校验字段提示/职务字段/社保费用明细/弹窗防误关/身份证查重/证明员工下拉/培训批量
P2: 离职流程去重/社保基数覆盖输入/薪税入口改名/添加员工引导/绩效模板清理

backend/src/services/contract.service.ts

@@ -13,6 +13,24 @@ function dateToMonth(date: Date): string {
   return `${y}-${m}`
 }
 
+async function clampSocialInsBase(orgId: string, base: number, city?: string): Promise<number> {
+  const config = await prisma.socialInsuranceConfig.findFirst({
+    where: { orgId, ...(city ? { city } : {}) },
+    orderBy: { effectiveFrom: 'desc' },
+  })
+  if (config) return Math.min(Math.max(base, config.baseMin), config.baseMax)
+  return base
+}
+
+async function clampHousingFundBase(orgId: string, base: number, city?: string): Promise<number> {
+  const config = await prisma.housingFundConfig.findFirst({
+    where: { orgId, ...(city ? { city } : {}) },
+    orderBy: { effectiveFrom: 'desc' },
+  })
+  if (config) return Math.min(Math.max(base, config.baseMin), config.baseMax)
+  return base
+}
+
 function prevMonth(month: string): string {
   const [y, m] = month.split('-').map(Number)
   const d = new Date(y, m - 2, 1)
@@ -191,6 +209,17 @@ export async function getEmployeeDetail(orgId: string, id: string) {
 }
 
 export async function createEmployee(orgId: string, userId: string, data: any) {
+  // 身份证号查重
+  if (data.idCardNumber) {
+    const existing = await prisma.employee.findFirst({
+      where: { orgId, idCardHash: sha256(data.idCardNumber) },
+      select: { id: true, name: true, department: true, status: true },
+    })
+    if (existing) {
+      throw { code: 'DUPLICATE_ID_CARD', message: `身份证号已存在：${existing.name}（${existing.department}，${existing.status === 'ACTIVE' ? '在职' : '离职'}），请确认是否重复录入` }
+    }
+  }
+
   const org = await prisma.organization.findUnique({ where: { id: orgId } })
   if (org && org.maxEmployees > 0) {
     const activeCount = await prisma.employee.count({ where: { orgId, status: 'ACTIVE' } })
@@ -202,8 +231,11 @@ export async function createEmployee(orgId: string, userId: string, data: any) {
   const hireDate = new Date(data.hireDate)
   const hireMonth = dateToMonth(hireDate)
   const salaryNum = Number(data.monthlySalary) || 0
-  const socialInsBase = data.socialInsBase != null ? Number(data.socialInsBase) : salaryNum
-  const housingFundBase = data.housingFundBase != null ? Number(data.housingFundBase) : salaryNum
+  const city = data.city || '北京'
+  const rawSocialInsBase = data.socialInsBase != null ? Number(data.socialInsBase) : salaryNum
+  const rawHousingFundBase = data.housingFundBase != null ? Number(data.housingFundBase) : salaryNum
+  const socialInsBase = await clampSocialInsBase(orgId, rawSocialInsBase, city)
+  const housingFundBase = await clampHousingFundBase(orgId, rawHousingFundBase, city)
   const socialInsStartMonth = data.socialInsStartMonth || hireMonth
   const housingFundStartMonth = data.housingFundStartMonth || hireMonth
 
@@ -230,6 +262,7 @@ export async function createEmployee(orgId: string, userId: string, data: any) {
         createdBy: userId,
         city: data.city || '北京',
         education: data.education || null,
+        position: data.position || null,
       },
     })
 
@@ -346,8 +379,11 @@ export async function rehireEmployee(orgId: string, userId: string, id: string,
 
   const newHireMonth = dateToMonth(newHireDate)
   const salaryNum = Number(decrypt(employee.monthlySalary)) || 0
-  const socialInsBase = data.socialInsBase != null ? Number(data.socialInsBase) : salaryNum
-  const housingFundBase = data.housingFundBase != null ? Number(data.housingFundBase) : salaryNum
+  const city = data.city || employee.city || '北京'
+  const rawSocialInsBase = data.socialInsBase != null ? Number(data.socialInsBase) : salaryNum
+  const rawHousingFundBase = data.housingFundBase != null ? Number(data.housingFundBase) : salaryNum
+  const socialInsBase = await clampSocialInsBase(orgId, rawSocialInsBase, city)
+  const housingFundBase = await clampHousingFundBase(orgId, rawHousingFundBase, city)
   const socialInsStartMonth = data.socialInsStartMonth || newHireMonth
   const housingFundStartMonth = data.housingFundStartMonth || newHireMonth
   const prevHireMonth = prevMonth(newHireMonth)
@@ -543,11 +579,18 @@ export async function updateEmployee(orgId: string, id: string, data: any) {
   if (data.isPregnant !== undefined) updateData.isPregnant = data.isPregnant
   if (data.isInMedicalPeriod !== undefined) updateData.isInMedicalPeriod = data.isInMedicalPeriod
   if (data.isWorkInjured !== undefined) updateData.isWorkInjured = data.isWorkInjured
-  if (data.socialInsBase !== undefined) updateData.socialInsBase = data.socialInsBase
-  if (data.housingFundBase !== undefined) updateData.housingFundBase = data.housingFundBase
+  if (data.socialInsBase !== undefined) {
+    const city = data.city || employee.city || '北京'
+    updateData.socialInsBase = await clampSocialInsBase(orgId, Number(data.socialInsBase), city)
+  }
+  if (data.housingFundBase !== undefined) {
+    const city = data.city || employee.city || '北京'
+    updateData.housingFundBase = await clampHousingFundBase(orgId, Number(data.housingFundBase), city)
+  }
   if (data.specialDeduction !== undefined) updateData.specialDeduction = data.specialDeduction
   if (data.city !== undefined) updateData.city = data.city
   if (data.education !== undefined) updateData.education = data.education
+  if (data.position !== undefined) updateData.position = data.position
 
   // 参保城市变更：关闭旧城市在保记录，创建新城市记录
   if (data.city !== undefined && data.city !== employee.city) {