feat: P2+P3 薪酬模板驱动计算 - SYSTEM注册表 + 前端动态化

P2: 社保/公积金/个税改为 SYSTEM 注册表驱动
- 新增 SystemCalcContext 和 systemCalculators 注册表
- ensureSocialHousingCalculated 缓存社保公积金计算
- calcTaxSystem 提取个税计算为系统函数
- calcBatchEntry 重构为模板拓扑排序调度

P3: 前端批次表格动态化 + 模板编辑器增强
- 后端模板 CRUD 支持 calcType/dependencies 字段
- TemplateTab 表格增加计算方式列
- TemplateTab 编辑表单增加 calcType 选择(公式/系统)
- BatchTab editableFields 从模板 isEditable 动态获取

backend/src/routes/payroll2.routes.ts

@@ -162,6 +162,8 @@ router.get('/template', async (req: AuthRequest, res: Response, next: NextFuncti
 const updateTemplateItemSchema = z.object({
   name: z.string().min(1).optional(),
   formula: z.string().nullable().optional(),
+  calcType: z.enum(['FORMULA', 'SYSTEM']).optional(),
+  dependencies: z.string().optional(),
   order: z.number().int().optional(),
   isEditable: z.boolean().optional(),
 })
@@ -179,6 +181,8 @@ router.put('/template/:id', async (req: AuthRequest, res: Response, next: NextFu
     if (data.formula !== undefined) updateData.formula = data.formula
     if (data.order !== undefined) updateData.order = data.order
     if (data.isEditable !== undefined) updateData.isEditable = data.isEditable
+    if (data.calcType !== undefined) updateData.calcType = data.calcType
+    if (data.dependencies !== undefined) updateData.dependencies = data.dependencies
 
     const updated = await prisma.payslipItem.update({ where: { id: req.params.id }, data: updateData })
     res.json({ success: true, data: updated })
@@ -193,6 +197,8 @@ const createTemplateItemSchema = z.object({
   code: z.string().min(1),
   type: z.enum(['INPUT', 'CALCULATED']),
   formula: z.string().nullable().optional(),
+  calcType: z.enum(['FORMULA', 'SYSTEM']).default('FORMULA'),
+  dependencies: z.string().default('[]'),
   order: z.number().int().default(99),
   isEditable: z.boolean().default(true),
 })

backend/src/services/payroll.service.ts

@@ -205,6 +205,177 @@ export function calcBonusTax(bonusAmount: number): number {
   return Math.max(0, Math.round(tax * 100) / 100)
 }
 
+// ========== 系统计算器注册表 ==========
+
+interface SystemCalcContext {
+  orgId: string
+  employeeId: string
+  month: string
+  batchType: string
+  employee: any
+  socialConfig: any
+  housingConfig: any
+  supplementaryHousingConfig: any
+  socialBase: number
+  housingBase: number
+  isNoSocialContract: boolean
+  options: any
+  values: Record<string, number>
+  // Side-effect outputs (org-side and supplementary amounts not in template)
+  socialOrg: number
+  housingOrg: number
+  supplementaryHousingEmp: number
+  supplementaryHousingOrg: number
+  taxBreakdown: any
+  // System values (before override)
+  systemSocialEmp: number
+  systemSocialOrg: number
+  systemHousingEmp: number
+  systemHousingOrg: number
+  systemSuppHousingEmp: number
+  systemSuppHousingOrg: number
+  // Internal cache flag
+  _socialCalculated: boolean
+}
+
+type SystemCalcFn = (ctx: SystemCalcContext) => Promise<number>
+
+/**
+ * 社保+公积金联合计算（缓存结果，避免重复查询数据库）
+ */
+async function ensureSocialHousingCalculated(ctx: SystemCalcContext) {
+  if (ctx._socialCalculated) return
+  ctx._socialCalculated = true
+
+  const { orgId, employeeId, month, batchType, socialConfig, housingConfig, supplementaryHousingConfig, socialBase, housingBase, isNoSocialContract, options } = ctx
+
+  let socialEmp = 0, socialOrg = 0, housingEmp = 0, housingOrg = 0
+  let suppHousingEmp = 0, suppHousingOrg = 0
+
+  if (batchType !== 'BONUS' && batchType !== 'SEVERANCE' && !options?.skipSocial && !isNoSocialContract) {
+    let fullSocialEmp = 0, fullSocialOrg = 0, fullHousingEmp = 0, fullHousingOrg = 0
+    let fullSuppHousingEmp = 0, fullSuppHousingOrg = 0
+    if (socialConfig) {
+      const social = calcSocialInsurance(socialBase, socialConfig)
+      fullSocialEmp = social.socialEmp
+      fullSocialOrg = social.socialOrg
+    }
+    if (housingConfig) {
+      const housing = calcHousingFund(housingBase, housingConfig)
+      fullHousingEmp = housing.housingEmp
+      fullHousingOrg = housing.housingOrg
+    }
+    if (supplementaryHousingConfig) {
+      const suppHousing = calcHousingFund(housingBase, supplementaryHousingConfig)
+      fullSuppHousingEmp = suppHousing.housingEmp
+      fullSuppHousingOrg = suppHousing.housingOrg
+    }
+
+    const archivedEntries = await prisma.batchEntry.findMany({
+      where: { orgId, employeeId, batch: { month, status: 'ARCHIVED', type: { in: ['REGULAR', 'TERMINATION'] } } },
+      select: { socialEmp: true, socialOrg: true, housingEmp: true, housingOrg: true, supplementaryHousingEmp: true, supplementaryHousingOrg: true },
+    })
+    const deductedSocialEmp = archivedEntries.reduce((s, e) => s + e.socialEmp, 0)
+    const deductedSocialOrg = archivedEntries.reduce((s, e) => s + e.socialOrg, 0)
+    const deductedHousingEmp = archivedEntries.reduce((s, e) => s + e.housingEmp, 0)
+    const deductedHousingOrg = archivedEntries.reduce((s, e) => s + e.housingOrg, 0)
+    const deductedSuppHousingEmp = archivedEntries.reduce((s, e) => s + (e.supplementaryHousingEmp || 0), 0)
+    const deductedSuppHousingOrg = archivedEntries.reduce((s, e) => s + (e.supplementaryHousingOrg || 0), 0)
+
+    socialEmp = Math.max(0, fullSocialEmp - deductedSocialEmp)
+    socialOrg = Math.max(0, fullSocialOrg - deductedSocialOrg)
+    housingEmp = Math.max(0, fullHousingEmp - deductedHousingEmp)
+    housingOrg = Math.max(0, fullHousingOrg - deductedHousingOrg)
+    suppHousingEmp = Math.max(0, fullSuppHousingEmp - deductedSuppHousingEmp)
+    suppHousingOrg = Math.max(0, fullSuppHousingOrg - deductedSuppHousingOrg)
+
+    if (options?.prevDeferred) {
+      socialEmp += options.prevDeferred.socialEmp || 0
+      housingEmp += options.prevDeferred.housingEmp || 0
+    }
+  }
+
+  ctx.values.socialEmp = socialEmp
+  ctx.values.housingEmp = housingEmp
+  ctx.socialOrg = socialOrg
+  ctx.housingOrg = housingOrg
+  ctx.supplementaryHousingEmp = suppHousingEmp
+  ctx.supplementaryHousingOrg = suppHousingOrg
+  ctx.systemSocialEmp = socialEmp
+  ctx.systemSocialOrg = socialOrg
+  ctx.systemHousingEmp = housingEmp
+  ctx.systemHousingOrg = housingOrg
+  ctx.systemSuppHousingEmp = suppHousingEmp
+  ctx.systemSuppHousingOrg = suppHousingOrg
+}
+
+/**
+ * 个税系统计算函数
+ */
+async function calcTaxSystem(ctx: SystemCalcContext): Promise<number> {
+  const { orgId, employeeId, month, batchType, employee, values } = ctx
+  const totalPay = values.totalPay || 0
+  const socialEmp = values.socialEmp || 0
+  const housingEmp = values.housingEmp || 0
+  const suppHousingEmp = ctx.supplementaryHousingEmp
+
+  if (batchType === 'BONUS') {
+    const tax = calcBonusTax(values.bonus || 0)
+    ctx.taxBreakdown = { method: '单独计税（年终奖）', bonus: values.bonus || 0, tax }
+    return tax
+  }
+
+  const year = month.slice(0, 4)
+  const archivedEntries = await prisma.batchEntry.findMany({
+    where: { orgId, employeeId, batch: { month: { startsWith: year }, status: 'ARCHIVED' } },
+    select: { totalPay: true, socialEmp: true, housingEmp: true, supplementaryHousingEmp: true, tax: true },
+  })
+  const ytdIncome = archivedEntries.reduce((s, e) => s + e.totalPay, 0) + totalPay
+  const ytdSocialEmp = archivedEntries.reduce((s, e) => s + e.socialEmp, 0) + socialEmp
+  const ytdHousingEmp = archivedEntries.reduce((s, e) => s + e.housingEmp + (e.supplementaryHousingEmp || 0), 0) + housingEmp + suppHousingEmp
+
+  const deductionRecords = await prisma.specialDeductionRecord.findMany({
+    where: { orgId, employeeId, month: { startsWith: year, lte: month } },
+    select: { amount: true, month: true },
+  })
+  let ytdSpecialDeduction: number
+  if (deductionRecords.length > 0) {
+    ytdSpecialDeduction = deductionRecords.reduce((s, r) => s + r.amount, 0)
+  } else {
+    ytdSpecialDeduction = employee.specialDeduction * Number(month.slice(5, 7))
+  }
+
+  const ytdTaxDeducted = archivedEntries.reduce((s, e) => s + e.tax, 0)
+  const deductionAmount = 5000 * Number(month.slice(5, 7))
+  const ytdTaxableIncome = Math.max(0, ytdIncome - deductionAmount - ytdSocialEmp - ytdHousingEmp - ytdSpecialDeduction)
+  const tax = calcCumulativeTax(ytdTaxableIncome, ytdTaxDeducted)
+  ctx.taxBreakdown = {
+    method: '累计预扣法',
+    month: Number(month.slice(5, 7)),
+    ytdIncome, deductionAmount, ytdSocialEmp, ytdHousingEmp, ytdSpecialDeduction,
+    specialDeductionSource: deductionRecords.length > 0 ? '按月记录' : '便捷字段',
+    specialDeductionRecords: deductionRecords.length,
+    ytdTaxableIncome, ytdTaxDeducted, currentMonthTax: tax, archivedCount: archivedEntries.length,
+  }
+  return tax
+}
+
+/**
+ * 系统计算器注册表
+ * key 对应 PayslipItem.formula 中的 SYSTEM 标识
+ */
+const systemCalculators: Record<string, SystemCalcFn> = {
+  SOCIAL_EMP: async (ctx) => {
+    await ensureSocialHousingCalculated(ctx)
+    return ctx.values.socialEmp
+  },
+  HOUSING_EMP: async (ctx) => {
+    await ensureSocialHousingCalculated(ctx)
+    return ctx.values.housingEmp
+  },
+  TAX: calcTaxSystem,
+}
+
 // ========== 批次计算 ==========
 
 export async function calcBatchEntry(
@@ -261,179 +432,72 @@ export async function calcBatchEntry(
   const socialBase = isNoSocialContract ? 0 : (employee.socialInsBase != null ? employee.socialInsBase : inputs.baseSalary)
   const housingBase = isNoSocialContract ? 0 : (employee.housingFundBase != null ? employee.housingFundBase : inputs.baseSalary)
 
-  let socialEmp = 0, socialOrg = 0, housingEmp = 0, housingOrg = 0
-  let suppHousingEmp = 0, suppHousingOrg = 0
-
-  // 年终奖/奖金批次、补偿金批次、劳务协议/实习协议人员：不扣社保公积金
-  // 其他批次：计算当月应缴全额，减去已归档批次已扣金额，差额为本批次应扣
-  if (batchType !== 'BONUS' && batchType !== 'SEVERANCE' && !options?.skipSocial && !isNoSocialContract) {
-    // 1. 计算当月应缴社保公积金全额
-    let fullSocialEmp = 0, fullSocialOrg = 0, fullHousingEmp = 0, fullHousingOrg = 0
-    let fullSuppHousingEmp = 0, fullSuppHousingOrg = 0
-    if (socialConfig) {
-      const social = calcSocialInsurance(socialBase, socialConfig)
-      fullSocialEmp = social.socialEmp
-      fullSocialOrg = social.socialOrg
-    }
-    if (housingConfig) {
-      const housing = calcHousingFund(housingBase, housingConfig)
-      fullHousingEmp = housing.housingEmp
-      fullHousingOrg = housing.housingOrg
-    }
-    // 补充公积金（用同样的公积金基数）
-    if (supplementaryHousingConfig) {
-      const suppHousing = calcHousingFund(housingBase, supplementaryHousingConfig)
-      fullSuppHousingEmp = suppHousing.housingEmp
-      fullSuppHousingOrg = suppHousing.housingOrg
-    }
-
-    // 2. 查询该员工当月已归档批次中已扣的社保公积金金额
-    const archivedEntries = await prisma.batchEntry.findMany({
-      where: {
-        orgId,
-        employeeId,
-        batch: { month, status: 'ARCHIVED', type: { in: ['REGULAR', 'TERMINATION'] } },
-      },
-      select: { socialEmp: true, socialOrg: true, housingEmp: true, housingOrg: true, supplementaryHousingEmp: true, supplementaryHousingOrg: true },
-    })
-    const deductedSocialEmp = archivedEntries.reduce((s, e) => s + e.socialEmp, 0)
-    const deductedSocialOrg = archivedEntries.reduce((s, e) => s + e.socialOrg, 0)
-    const deductedHousingEmp = archivedEntries.reduce((s, e) => s + e.housingEmp, 0)
-    const deductedHousingOrg = archivedEntries.reduce((s, e) => s + e.housingOrg, 0)
-    const deductedSuppHousingEmp = archivedEntries.reduce((s, e) => s + (e.supplementaryHousingEmp || 0), 0)
-    const deductedSuppHousingOrg = archivedEntries.reduce((s, e) => s + (e.supplementaryHousingOrg || 0), 0)
-
-    // 3. 本批次应扣 = 应缴全额 - 已扣金额（不足额补扣，足额为0）
-    socialEmp = Math.max(0, fullSocialEmp - deductedSocialEmp)
-    socialOrg = Math.max(0, fullSocialOrg - deductedSocialOrg)
-    housingEmp = Math.max(0, fullHousingEmp - deductedHousingEmp)
-    housingOrg = Math.max(0, fullHousingOrg - deductedHousingOrg)
-    suppHousingEmp = Math.max(0, fullSuppHousingEmp - deductedSuppHousingEmp)
-    suppHousingOrg = Math.max(0, fullSuppHousingOrg - deductedSuppHousingOrg)
-
-    // 4. 叠加上月递延的社保/公积金（入职当月未扣完的部分，本月补扣）
-    if (options?.prevDeferred) {
-      socialEmp += options.prevDeferred.socialEmp || 0
-      housingEmp += options.prevDeferred.housingEmp || 0
-    }
-  }
-
-  // 保存系统计算值（覆盖前，含递延）
-  const systemSocialEmp = socialEmp
-  const systemSocialOrg = socialOrg
-  const systemHousingEmp = housingEmp
-  const systemHousingOrg = housingOrg
-  const systemSupplementaryHousingEmp = suppHousingEmp
-  const systemSupplementaryHousingOrg = suppHousingOrg
-
-  // 手动覆盖社保值
-  if (options?.overrideSocial) {
-    if (options.overrideSocial.socialEmp !== undefined) socialEmp = options.overrideSocial.socialEmp
-    if (options.overrideSocial.socialOrg !== undefined) socialOrg = options.overrideSocial.socialOrg
-    if (options.overrideSocial.housingEmp !== undefined) housingEmp = options.overrideSocial.housingEmp
-    if (options.overrideSocial.housingOrg !== undefined) housingOrg = options.overrideSocial.housingOrg
-  }
-
-  // 应发合计：从模板公式计算（默认公式与之前硬编码一致）
+  // ── 模板驱动计算 ──
   const templateItems = await getTemplate(orgId)
-  const totalPayItem = templateItems.find(i => i.code === 'totalPay')
-  let totalPay: number
-  if (totalPayItem && totalPayItem.formula) {
-    const formulaVars: Record<string, number> = {
-      baseSalary: inputs.baseSalary,
-      positionSalary: inputs.positionSalary || 0,
-      performanceSalary: inputs.performanceSalary || 0,
-      senioritySalary: inputs.senioritySalary || 0,
-      overtimePay: inputs.overtimePay,
-      transportAllowance: inputs.transportAllowance || 0,
-      mealAllowance: inputs.mealAllowance || 0,
-      housingAllowance: inputs.housingAllowance || 0,
-      communicationAllowance: inputs.communicationAllowance || 0,
-      allowance: inputs.allowance,
-      bonus: inputs.bonus,
-      deduction: inputs.deduction,
-      otherDeduction: inputs.otherDeduction || 0,
-    }
-    totalPay = evalFormula(totalPayItem.formula, formulaVars)
-  } else {
-    // 回退到硬编码（兼容模板未配置的情况）
-    totalPay = inputs.baseSalary
-      + (inputs.positionSalary || 0)
-      + (inputs.performanceSalary || 0)
-      + (inputs.senioritySalary || 0)
-      + inputs.overtimePay
-      + (inputs.transportAllowance || 0)
-      + (inputs.mealAllowance || 0)
-      + (inputs.housingAllowance || 0)
-      + (inputs.communicationAllowance || 0)
-      + inputs.allowance
-      + inputs.bonus
-      - inputs.deduction
-      - (inputs.otherDeduction || 0)
+
+  // 构建系统计算上下文
+  const ctx: SystemCalcContext = {
+    orgId, employeeId, month, batchType, employee,
+    socialConfig, housingConfig, supplementaryHousingConfig,
+    socialBase, housingBase, isNoSocialContract, options,
+    values: {},
+    socialOrg: 0, housingOrg: 0,
+    supplementaryHousingEmp: 0, supplementaryHousingOrg: 0,
+    taxBreakdown: null,
+    systemSocialEmp: 0, systemSocialOrg: 0,
+    systemHousingEmp: 0, systemHousingOrg: 0,
+    systemSuppHousingEmp: 0, systemSuppHousingOrg: 0,
+    _socialCalculated: false,
   }
 
-  // 个税计算
-  let tax = 0
-  let taxBreakdown: any = null
-  if (batchType === 'BONUS') {
-    // 年终奖单独计税
-    tax = calcBonusTax(inputs.bonus)
-    taxBreakdown = { method: '单独计税（年终奖）', bonus: inputs.bonus, tax }
-  } else {
-    // 累计预扣法（补偿金也走累计预扣，但无社保公积金扣除）
-    const year = month.slice(0, 4)
-    // 从已归档批次的 BatchEntry 获取当年历史数据（不依赖工资条是否已生成）
-    const archivedEntries = await prisma.batchEntry.findMany({
-      where: {
-        orgId,
-        employeeId,
-        batch: {
-          month: { startsWith: year },
-          status: 'ARCHIVED',
-        },
-      },
-      select: { totalPay: true, socialEmp: true, housingEmp: true, supplementaryHousingEmp: true, tax: true },
-    })
-    const ytdIncome = archivedEntries.reduce((s, e) => s + e.totalPay, 0) + totalPay
-    const ytdSocialEmp = archivedEntries.reduce((s, e) => s + e.socialEmp, 0) + socialEmp
-    const ytdHousingEmp = archivedEntries.reduce((s, e) => s + e.housingEmp + (e.supplementaryHousingEmp || 0), 0) + housingEmp + suppHousingEmp
-
-    // 专项附加扣除：按月读取 SpecialDeductionRecord 实际填报金额累加
-    // 优先使用按月记录；若无按月记录，回退到员工便捷字段 × 月数（兼容旧数据）
-    const deductionRecords = await prisma.specialDeductionRecord.findMany({
-      where: { orgId, employeeId, month: { startsWith: year, lte: month } },
-      select: { amount: true, month: true },
-    })
-    let ytdSpecialDeduction: number
-    if (deductionRecords.length > 0) {
-      // 按月实际填报金额累加
-      ytdSpecialDeduction = deductionRecords.reduce((s, r) => s + r.amount, 0)
-    } else {
-      // 回退：员工便捷字段 × 月数（兼容未填报按月记录的旧数据）
-      ytdSpecialDeduction = employee.specialDeduction * Number(month.slice(5, 7))
-    }
-
-    const ytdTaxDeducted = archivedEntries.reduce((s, e) => s + e.tax, 0)
-    const deductionAmount = 5000 * Number(month.slice(5, 7))
-    const ytdTaxableIncome = Math.max(0, ytdIncome - deductionAmount - ytdSocialEmp - ytdHousingEmp - ytdSpecialDeduction)
-    tax = calcCumulativeTax(ytdTaxableIncome, ytdTaxDeducted)
-    taxBreakdown = {
-      method: '累计预扣法',
-      month: Number(month.slice(5, 7)),
-      ytdIncome,
-      deductionAmount,
-      ytdSocialEmp,
-      ytdHousingEmp,
-      ytdSpecialDeduction,
-      specialDeductionSource: deductionRecords.length > 0 ? '按月记录' : '便捷字段',
-      specialDeductionRecords: deductionRecords.length,
-      ytdTaxableIncome,
-      ytdTaxDeducted,
-      currentMonthTax: tax,
-      archivedCount: archivedEntries.length,
+  // 1. 初始化输入项
+  for (const item of templateItems) {
+    if (item.type === 'INPUT') {
+      ctx.values[item.code] = (inputs as any)[item.code] || 0
     }
   }
 
+  // 2. 按拓扑排序计算所有项
+  const sorted = topologicalSort(templateItems)
+  for (const item of sorted) {
+    if (item.type === 'INPUT') continue
+
+    // 在计算 tax 前应用手动覆盖（覆盖社保值）
+    if (item.code === 'tax' && options?.overrideSocial) {
+      if (options.overrideSocial.socialEmp !== undefined) ctx.values.socialEmp = options.overrideSocial.socialEmp
+      if (options.overrideSocial.housingEmp !== undefined) ctx.values.housingEmp = options.overrideSocial.housingEmp
+      if (options.overrideSocial.socialOrg !== undefined) ctx.socialOrg = options.overrideSocial.socialOrg
+      if (options.overrideSocial.housingOrg !== undefined) ctx.housingOrg = options.overrideSocial.housingOrg
+    }
+
+    if (item.calcType === 'SYSTEM' && item.formula) {
+      const fn = systemCalculators[item.formula]
+      if (fn) {
+        ctx.values[item.code] = await fn(ctx)
+      }
+    } else if (item.formula) {
+      ctx.values[item.code] = evalFormula(item.formula, ctx.values)
+    }
+  }
+
+  // 3. 提取计算结果
+  let socialEmp = ctx.values.socialEmp || 0
+  let socialOrg = ctx.socialOrg
+  let housingEmp = ctx.values.housingEmp || 0
+  let housingOrg = ctx.housingOrg
+  let suppHousingEmp = ctx.supplementaryHousingEmp
+  let suppHousingOrg = ctx.supplementaryHousingOrg
+  const systemSocialEmp = ctx.systemSocialEmp
+  const systemSocialOrg = ctx.systemSocialOrg
+  const systemHousingEmp = ctx.systemHousingEmp
+  const systemHousingOrg = ctx.systemHousingOrg
+  const systemSupplementaryHousingEmp = ctx.systemSuppHousingEmp
+  const systemSupplementaryHousingOrg = ctx.systemSuppHousingOrg
+  let tax = ctx.values.tax || 0
+  const taxBreakdown = ctx.taxBreakdown
+  let totalPay = ctx.values.totalPay || 0
+  let netPay = ctx.values.netPay || 0
+
   // ── 最低工资保护 + 递延扣款逻辑 ──
   // 读取最低工资标准（从年度标准或旧配置表）
   let minWage = 0
@@ -444,21 +508,8 @@ export async function calcBatchEntry(
   // 上月递延的最低工资补齐差额（本批次需扣回）
   const prevDeferredMinWage = options?.prevDeferred?.minWage || 0
 
-  // 初始实发：优先从模板公式计算，再减去补充公积金和递延项（模板公式不含这两个系统内部字段）
-  const netPayItem = templateItems.find(i => i.code === 'netPay')
-  let netPay: number
-  if (netPayItem && netPayItem.formula) {
-    const formulaVars: Record<string, number> = {
-      totalPay,
-      socialEmp,
-      housingEmp,
-      tax,
-    }
-    netPay = evalFormula(netPayItem.formula, formulaVars) - suppHousingEmp - prevDeferredMinWage
-  } else {
-    // 回退到硬编码
-    netPay = totalPay - socialEmp - housingEmp - suppHousingEmp - tax - prevDeferredMinWage
-  }
+  // netPay 已由模板公式计算（公式中不含补充公积金和递延项），此处补扣
+  netPay = netPay - suppHousingEmp - prevDeferredMinWage
 
   // 递延金额（本批次扣不动、递延到次月的部分）
   let deferredSocialEmp = 0

frontend/src/pages/money/BatchTab.tsx

@@ -497,6 +497,13 @@ function BatchDetail({ batchId, onBack }: { batchId: string; onBack: () => void
     },
   })
 
+  const { data: templateItems } = useQuery<any[]>({
+    queryKey: ['payslip-template'],
+    queryFn: async () => {
+      return await payrollApi.template()
+    },
+  })
+
   const updateEntryMutation = useMutation({
     mutationFn: ({ employeeId, data }: { employeeId: string; data: any }) =>
       payrollApi.updateBatchEntry(batchId, employeeId, data),
@@ -729,10 +736,19 @@ function BatchDetail({ batchId, onBack }: { batchId: string; onBack: () => void
     }
   }
 
-  // 可编辑的输入项字段
-  const editableFields = isBonus
-    ? ['bonus']
-    : ['baseSalary', 'performanceSalary', 'overtimePay', 'allowance', 'deduction', 'bonus', 'socialEmp', 'housingEmp', 'socialOrg', 'housingOrg']
+  // 可编辑的输入项字段：从模板动态获取，回退到硬编码
+  const editableFields = (() => {
+    if (templateItems && templateItems.length > 0) {
+      const editable = templateItems.filter((i: any) => i.isEditable).map((i: any) => i.code)
+      // 奖金批次只允许编辑 bonus
+      if (isBonus) return ['bonus']
+      // 社保/公积金允许手动覆盖
+      return [...editable, 'socialEmp', 'housingEmp', 'socialOrg', 'housingOrg']
+    }
+    return isBonus
+      ? ['bonus']
+      : ['baseSalary', 'performanceSalary', 'overtimePay', 'allowance', 'deduction', 'bonus', 'socialEmp', 'housingEmp', 'socialOrg', 'housingOrg']
+  })()
 
   // 点击单元格进入编辑
   const startEdit = (employeeId: string, field: string, currentValue: number) => {

frontend/src/pages/money/TemplateTab.tsx

@@ -23,6 +23,7 @@ export function TemplateManager() {
     code: '',
     type: 'INPUT' as 'INPUT' | 'CALCULATED',
     formula: '',
+    calcType: 'FORMULA' as 'FORMULA' | 'SYSTEM',
     order: 99,
     isEditable: true,
   })
@@ -67,7 +68,7 @@ export function TemplateManager() {
   /** 打开新增表单 */
   const handleAdd = () => {
     setEditingItem(null)
-    setForm({ name: '', code: '', type: 'INPUT', formula: '', order: items?.length ? items.length + 1 : 99, isEditable: true })
+    setForm({ name: '', code: '', type: 'INPUT', formula: '', calcType: 'FORMULA', order: items?.length ? items.length + 1 : 99, isEditable: true })
     setShowForm(true)
   }
 
@@ -79,6 +80,7 @@ export function TemplateManager() {
       code: item.code,
       type: item.type,
       formula: item.formula || '',
+      calcType: item.calcType || 'FORMULA',
       order: item.order,
       isEditable: item.isEditable,
     })
@@ -91,10 +93,11 @@ export function TemplateManager() {
       toast.error('名称和字段代码不能为空')
       return
     }
-    const payload = {
+    const payload: any = {
       name: form.name.trim(),
       type: form.type,
       formula: form.type === 'CALCULATED' ? form.formula.trim() || null : null,
+      calcType: form.type === 'CALCULATED' ? form.calcType : 'FORMULA',
       order: Number(form.order),
       isEditable: form.isEditable,
     }
@@ -128,6 +131,7 @@ export function TemplateManager() {
                   <th className="py-2 px-2 w-24">名称</th>
                   <th className="py-2 px-2 w-32">字段代码</th>
                   <th className="py-2 px-2 w-20">类型</th>
+                  <th className="py-2 px-2 w-24">计算方式</th>
                   <th className="py-2 px-2 w-48">计算公式</th>
                   <th className="py-2 px-2 w-16">可编辑</th>
                   <th className="py-2 px-2 text-right w-24">操作</th>
@@ -144,6 +148,13 @@ export function TemplateManager() {
                         {item.type === 'INPUT' ? '输入项' : '计算项'}
                       </span>
                     </td>
+                    <td className="py-2 px-2">
+                      {item.type === 'CALCULATED' && (
+                        <span className={`px-2 py-0.5 rounded text-xs whitespace-nowrap ${(item.calcType || 'FORMULA') === 'SYSTEM' ? 'bg-amber-50 text-amber-600' : 'bg-teal-50 text-teal-600'}`}>
+                          {(item.calcType || 'FORMULA') === 'SYSTEM' ? '系统计算' : '公式计算'}
+                        </span>
+                      )}
+                    </td>
                     <td className="py-2 px-2 text-gray-500 font-mono text-xs max-w-48 truncate" title={item.formula || ''}>{item.formula || '—'}</td>
                     <td className="py-2 px-2">
                       <span className={`text-xs ${item.isEditable ? 'text-safe' : 'text-gray-500'}`}>
@@ -240,15 +251,36 @@ export function TemplateManager() {
                 </div>
               </div>
               {form.type === 'CALCULATED' && (
-                <div>
-                  <Label>计算公式</Label>
-                  <Input
-                    type="text"
-                    value={form.formula}
-                    onChange={(e) => setForm({ ...form, formula: e.target.value })}
-                    placeholder="如：baseSalary + overtimePay + allowance - deduction"
-                  />
-                  <p className="text-xs text-gray-500 mt-1">可引用其他字段代码进行加减乘除运算</p>
+                <div className="space-y-2">
+                  <div>
+                    <Label>计算方式</Label>
+                    <Select
+                      value={form.calcType}
+                      onChange={(e) => setForm({ ...form, calcType: e.target.value as 'FORMULA' | 'SYSTEM' })}
+                      disabled={!!editingItem && editingItem.isDefault}
+                    >
+                      <option value="FORMULA">公式计算（加减乘除表达式）</option>
+                      <option value="SYSTEM">系统计算（社保/公积金/个税等）</option>
+                    </Select>
+                    {editingItem && editingItem.isDefault && (
+                      <p className="text-xs text-gray-500 mt-1">预置项的计算方式不可修改</p>
+                    )}
+                  </div>
+                  <div>
+                    <Label>{form.calcType === 'SYSTEM' ? '系统函数标识' : '计算公式'}</Label>
+                    <Input
+                      type="text"
+                      value={form.formula}
+                      onChange={(e) => setForm({ ...form, formula: e.target.value })}
+                      placeholder={form.calcType === 'SYSTEM' ? '如：SOCIAL_EMP' : '如：baseSalary + overtimePay + allowance - deduction'}
+                      disabled={!!editingItem && editingItem.isDefault && form.calcType === 'SYSTEM'}
+                    />
+                    <p className="text-xs text-gray-500 mt-1">
+                      {form.calcType === 'SYSTEM'
+                        ? '系统计算标识：SOCIAL_EMP（个人社保）、HOUSING_EMP（个人公积金）、TAX（个税）'
+                        : '可引用其他字段代码进行加减乘除运算，支持 min()、max()、round() 函数'}
+                    </p>
+                  </div>
                 </div>
               )}
               <div>