feat: Phase 1-3 优化全部完成

Phase 1 紧急修复（8项）:
- 社保城市选择改为可输入
- 社保上下限拆分（三险/医保独立基数）
- 公积金试算结果展示修复
- 花名册合同保存修复（日期ISO格式）
- 薪酬批次创建失败修复（城市过滤+错误处理）
- 证据链查看修复
- 个税计算修复（blank_employees读取基本工资）
- 加班费倍率读取配置

Phase 2 功能完善（3项）:
- 批量导入per-row异常捕获+导入按钮
- 单人发薪UI入口优化
- 解除协议模板补充（员工提出离职版）

Phase 3 后期规划（4项）:
- 工资表导入功能（POST /import/payroll + 前端入口）
- 大病险/长护险附加险种（extraInsurances JSON + 计算适配）
- 专项附加扣除按月录入（SpecialDeductionRecord模型 + 前端Tab）
- 预置河北省社保政策（seed数据）

backend/src/routes/payroll2.routes.ts

@@ -297,6 +297,7 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
 
     // 创建批次条目
     const entries: any[] = []
+    const failedEmployees: { employeeId: string; name: string; error: string }[] = []
     for (const emp of employees) {
       let baseSalary = 0
       let overtimePay = 0
@@ -334,6 +335,10 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
         deduction = prevPayslip?.deduction || 0
       }
       // blank_employees 和 blank_all: 所有金额默认 0
+      // blank_employees 模式下尝试从员工记录获取基本工资
+      if (mode === 'blank_employees' && emp.monthlySalary) {
+        try { baseSalary = Number(decrypt(emp.monthlySalary)) || 0 } catch { baseSalary = Number(emp.monthlySalary) || 0 }
+      }
 
       // 判断同月是否已有归档的常规批次（用于决定是否跳过社保）
       const hasArchivedRegularBatch = await prisma.payrollBatch.count({
@@ -343,7 +348,15 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
       // 计算社保、个税等
       // 同月已有归档常规批次时，新批次跳过社保（避免重复扣缴），但用户可手动编辑覆盖
       const skipSocial = type !== 'BONUS' && type !== 'SEVERANCE' && hasArchivedRegularBatch > 0
-      const calcResult = await calcBatchEntry(orgId, emp.id, month, { baseSalary, overtimePay, allowance, deduction, bonus }, type, { skipSocial })
+
+      let calcResult: any
+      try {
+        calcResult = await calcBatchEntry(orgId, emp.id, month, { baseSalary, overtimePay, allowance, deduction, bonus }, type, { skipSocial })
+      } 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
       const riskWarnings = await getPayrollRiskWarnings(orgId, emp.id)
@@ -396,7 +409,7 @@ router.post('/batches', async (req: AuthRequest, res: Response, next: NextFuncti
       include: { entries: { include: { employee: { select: { id: true, name: true, department: true, status: true } } } } },
     })
 
-    res.json({ success: true, data: updatedBatch })
+    res.json({ success: true, data: updatedBatch, failedEmployees: failedEmployees.length > 0 ? failedEmployees : undefined })
   } catch (err) {
     next(err)
   }