feat: 20260815 系统优化 - 全部31项问题修复(P0×6+P1×14+P2×9+P3×2)

P0紧急修复(6项):
- 草稿保存完整恢复所有字段(含socialAvgWage)
- 补偿金批次从compensationBreakdown读取
- 违法解除风险确认UI
- 合同结束日期前后校验(前后端双保险)

P1高优先级(14项):
- 离职日期联动社保/公积金截止月(15号规则)
- 合规检查+工作交接改为软阻断(生成待办)
- 补偿月数(N/N+1/2N/自定义)+计算基数(近12月/合同/自定义)
- 解聘并入花名册操作栏(类型选择跳转向导)
- 合同续签开始日期自动推导(原合同结束日+1天)
- 年龄合规筛查(童工阻断/未成年工/退休警告)
- 编辑入职日期后状态联动(待入职↔在职)
- 转正移植到花名册操作栏+薪资回写
- 男职工无法选择三期

P2体验优化(9项):
- "劳动合同"调整为"用工关系"
- 费用结算新增剩余年假折算(300%日工资)
- 身份证号全域改为"证件号码"(前后端18个文件)
- 手机号查重
- 开具证明+合同续签移植到花名册操作栏
- 批量转正+批量开具证明
- 去掉用工办理模块

P3规划(2项):
- 组织架构+审批流(Department/Position/ApprovalFlow/ApprovalInstance)
- 客服工作台(Ticket/ChatSession+SUPPORT角色)

新增模型: Department/Position/ApprovalFlow/ApprovalInstance/Ticket/TicketMessage/ChatSession/ChatMessage
新增字段: Employee.departmentId/supervisorId
新增角色: SUPPORT

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

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

backend/src/routes/payroll2.routes.ts

@@ -283,7 +283,18 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
           where: { orgId, terminationDate: { gte: monthStart, lte: monthEnd } },
           include: { employee: { include: { contracts: { orderBy: { createdAt: 'desc' }, take: 1 } } } },
         })
-        employees = terminations.map(t => t.employee)
+        // SEVERANCE 批次：仅包含已审批通过（APPROVED/EXECUTING/COMPLETED）且有补偿金的离职记录
+        if (type === 'SEVERANCE') {
+          const eligibleTerms = terminations.filter(t =>
+            (t.status === 'APPROVED' || t.status === 'EXECUTING' || t.status === 'COMPLETED') &&
+            (t.compensation > 0 || (t.compensationBreakdown as any)?.total > 0)
+          )
+          employees = eligibleTerms.map(t => t.employee)
+          // 缓存 terminationRecord 以便后续 entry 创建时读取补偿金
+          ;(req as any)._severanceTerms = new Map(eligibleTerms.map(t => [t.employeeId, t]))
+        } else {
+          employees = terminations.map(t => t.employee)
+        }
       } else {
         employees = await prisma.employee.findMany({
           where: {
@@ -357,14 +368,33 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
         try { baseSalary = Number(decrypt(emp.monthlySalary)) || 0 } catch { baseSalary = Number(emp.monthlySalary) || 0 }
       }
 
+      // SEVERANCE 批次：从离职记录读取补偿金作为应发金额，不走工资/社保/个税计算
+      let severanceAmount = 0
+      let severanceBreakdown: any = null
+      if (type === 'SEVERANCE') {
+        const severanceTerms: Map<string, any> = (req as any)._severanceTerms || new Map()
+        const termRecord = severanceTerms.get(emp.id)
+        if (termRecord) {
+          severanceBreakdown = termRecord.compensationBreakdown
+          // 优先取 compensationBreakdown.total（含手动调整），否则取 compensation
+          severanceAmount = (severanceBreakdown as any)?.total || termRecord.compensation || 0
+          baseSalary = severanceAmount
+        }
+      }
+
       // calcBatchEntry 内部会按员工检查当月已归档批次是否已扣社保，已扣则跳过
+      // SEVERANCE 批次：补偿金不走社保/个税计算，直接作为应发和实发金额
       let calcResult: any
-      try {
-        calcResult = await calcBatchEntry(orgId, emp.id, month, { baseSalary, overtimePay, allowance, deduction, bonus }, type)
-      } catch (calcErr: any) {
-        // 单个员工计算失败不阻塞整个批次，记录错误并使用零值
-        failedEmployees.push({ employeeId: emp.id, name: emp.name, error: calcErr?.message || '计算失败' })
-        calcResult = { socialEmp: 0, socialOrg: 0, housingEmp: 0, housingOrg: 0, tax: 0, totalPay: baseSalary + overtimePay + allowance + bonus - deduction, netPay: baseSalary + overtimePay + allowance + bonus - deduction }
+      if (type === 'SEVERANCE' && severanceAmount > 0) {
+        calcResult = { socialEmp: 0, socialOrg: 0, housingEmp: 0, housingOrg: 0, tax: 0, totalPay: severanceAmount, netPay: severanceAmount }
+      } else {
+        try {
+          calcResult = await calcBatchEntry(orgId, emp.id, month, { baseSalary, overtimePay, allowance, deduction, bonus }, type)
+        } catch (calcErr: any) {
+          // 单个员工计算失败不阻塞整个批次，记录错误并使用零值
+          failedEmployees.push({ employeeId: emp.id, name: emp.name, error: calcErr?.message || '计算失败' })
+          calcResult = { socialEmp: 0, socialOrg: 0, housingEmp: 0, housingOrg: 0, tax: 0, totalPay: baseSalary + overtimePay + allowance + bonus - deduction, netPay: baseSalary + overtimePay + allowance + bonus - deduction }
+        }
       }
 
       // 风险提示