fix: 人力成本分析按员工去重，统一与Dashboard口径；环比/同比无数据时显示暂无数据

backend/src/services/risk.service.ts

@@ -1116,18 +1116,34 @@ export async function getCostAnalysis(orgId: string, month: string) {
   const lastYearMonthEnd = new Date(year - 1, monthNum, 0, 23, 59, 59)
   const lastYearMonthStr = `${lastYearMonthStart.getFullYear()}-${String(lastYearMonthStart.getMonth() + 1).padStart(2, '0')}`
 
-  // 获取各月归档批次汇总
+  // 获取各月归档批次汇总（按员工去重，与 getDashboardData 口径一致）
   const getMonthCost = async (m: string) => {
-    const batches = await prisma.payrollBatch.findMany({
-      where: { orgId, month: m, status: 'ARCHIVED' },
+    const entries = await prisma.batchEntry.findMany({
+      where: { orgId, batch: { month: m, status: 'ARCHIVED' } },
+      select: { employeeId: true, totalPay: true, socialOrg: true, housingOrg: true, tax: true },
     })
-    return batches.reduce((acc, b) => ({
-      totalPay: acc.totalPay + b.totalPay,
-      totalSocialOrg: acc.totalSocialOrg + b.totalSocialOrg,
-      totalHousingOrg: acc.totalHousingOrg + b.totalHousingOrg,
-      totalTax: acc.totalTax + b.totalTax,
-      employeeCount: acc.employeeCount + b.employeeCount,
-    }), { totalPay: 0, totalSocialOrg: 0, totalHousingOrg: 0, totalTax: 0, employeeCount: 0 })
+    // 同一员工多批次只取一条（取最后一条，金额通常已合并）
+    const empMap = new Map<string, { totalPay: number; socialOrg: number; housingOrg: number; tax: number }>()
+    for (const e of entries) {
+      const ex = empMap.get(e.employeeId)
+      if (!ex) {
+        empMap.set(e.employeeId, { totalPay: e.totalPay, socialOrg: e.socialOrg, housingOrg: e.housingOrg, tax: e.tax })
+      } else {
+        // 同一员工多批次：累加金额
+        ex.totalPay += e.totalPay
+        ex.socialOrg += e.socialOrg
+        ex.housingOrg += e.housingOrg
+        ex.tax += e.tax
+      }
+    }
+    const deduped = Array.from(empMap.values())
+    return {
+      totalPay: deduped.reduce((s, e) => s + e.totalPay, 0),
+      totalSocialOrg: deduped.reduce((s, e) => s + e.socialOrg, 0),
+      totalHousingOrg: deduped.reduce((s, e) => s + e.housingOrg, 0),
+      totalTax: deduped.reduce((s, e) => s + e.tax, 0),
+      employeeCount: deduped.length,
+    }
   }
 
   const current = await getMonthCost(month)
@@ -1183,7 +1199,7 @@ export async function getCostAnalysis(orgId: string, month: string) {
     })
   }
 
-  // 按部门拆分成本
+  // 按部门拆分成本（按员工去重）
   const deptEntries = await prisma.batchEntry.findMany({
     where: {
       orgId,
@@ -1191,14 +1207,26 @@ export async function getCostAnalysis(orgId: string, month: string) {
     },
     include: { employee: { select: { department: true } } },
   })
-  const deptMap: Record<string, { totalPay: number; socialOrg: number; housingOrg: number; headcount: number }> = {}
+  // 先按员工去重，同一员工多批次累加金额
+  const deptEmpMap = new Map<string, { dept: string; totalPay: number; socialOrg: number; housingOrg: number }>()
   for (const e of deptEntries) {
     const dept = e.employee?.department || '未分配'
-    if (!deptMap[dept]) deptMap[dept] = { totalPay: 0, socialOrg: 0, housingOrg: 0, headcount: 0 }
-    deptMap[dept].totalPay += e.totalPay
-    deptMap[dept].socialOrg += e.socialOrg
-    deptMap[dept].housingOrg += e.housingOrg
-    deptMap[dept].headcount += 1
+    const ex = deptEmpMap.get(e.employeeId)
+    if (!ex) {
+      deptEmpMap.set(e.employeeId, { dept, totalPay: e.totalPay, socialOrg: e.socialOrg, housingOrg: e.housingOrg })
+    } else {
+      ex.totalPay += e.totalPay
+      ex.socialOrg += e.socialOrg
+      ex.housingOrg += e.housingOrg
+    }
+  }
+  const deptMap: Record<string, { totalPay: number; socialOrg: number; housingOrg: number; headcount: number }> = {}
+  for (const [, v] of deptEmpMap) {
+    if (!deptMap[v.dept]) deptMap[v.dept] = { totalPay: 0, socialOrg: 0, housingOrg: 0, headcount: 0 }
+    deptMap[v.dept].totalPay += v.totalPay
+    deptMap[v.dept].socialOrg += v.socialOrg
+    deptMap[v.dept].housingOrg += v.housingOrg
+    deptMap[v.dept].headcount += 1
   }
   const departmentCost = Object.entries(deptMap)
     .map(([dept, v]) => ({