fix: 专项附加扣除改为5项明细分类（子女教育、赡养老人、住房、继续教育、婴幼儿照护）

- 后端 GET /profile 返回最新月份的专项附加扣除明细记录
- 后端 PUT /profile 保存明细到 SpecialDeductionRecord 表（当前月份 upsert）
- 前端5项明细输入框 + 合计实时计算 + 备注字段
- 与管理端社保>专项附加扣除 Tab 数据结构一致

backend/src/routes/portal.routes.ts

@@ -903,6 +903,21 @@ router.get('/profile', portalAuth, async (req: any, res, next) => {
       }
     }
 
+    // 查询最新月份的专项附加扣除明细
+    const latestDeductionRecord = await (prisma as any).specialDeductionRecord.findFirst({
+      where: { employeeId, orgId },
+      orderBy: { month: 'desc' },
+    })
+    const latestDeduction = latestDeductionRecord ? {
+      month: latestDeductionRecord.month,
+      children: latestDeductionRecord.children || 0,
+      elderly: latestDeductionRecord.elderly || 0,
+      housing: latestDeductionRecord.housing || 0,
+      education: latestDeductionRecord.education || 0,
+      infant: latestDeductionRecord.infant || 0,
+      remark: latestDeductionRecord.remark || '',
+    } : null
+
     res.json({
       success: true,
       data: {
@@ -925,6 +940,7 @@ router.get('/profile', portalAuth, async (req: any, res, next) => {
         employeeNo: emp.employeeNo || '',
         femaleWorkerType: emp.femaleWorkerType || '',
         specialDeduction: emp.specialDeduction ?? 0,
+        specialDeductionDetail: latestDeduction,
       },
     })
   } catch (err) { next(err) }
@@ -940,7 +956,7 @@ router.put('/profile', portalAuth, async (req: any, res, next) => {
     const {
       emergencyContact, emergencyPhone, address,
       bankAccount, bankName, education, city,
-      specialDeduction,
+      specialDeductionDetail,
     } = req.body
 
     // 构建更新数据（仅允许员工自行编辑的字段）
@@ -955,9 +971,38 @@ router.put('/profile', portalAuth, async (req: any, res, next) => {
     if (bankAccount !== undefined && bankAccount) {
       updateData.bankAccount = encrypt(bankAccount)
     }
-    // 专项附加扣除（子女教育、赡养老人等，员工自行填报）
-    if (specialDeduction !== undefined) {
-      updateData.specialDeduction = Number(specialDeduction) || 0
+
+    // 专项附加扣除明细保存到 SpecialDeductionRecord 表（当前月份）
+    if (specialDeductionDetail && typeof specialDeductionDetail === 'object') {
+      const now = new Date()
+      const currentMonth = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}`
+      const { children, elderly, housing, education: dedEducation, infant, remark } = specialDeductionDetail
+      const total = (Number(children) || 0) + (Number(elderly) || 0) + (Number(housing) || 0) + (Number(dedEducation) || 0) + (Number(infant) || 0)
+      await (prisma as any).specialDeductionRecord.upsert({
+        where: { employeeId_month: { employeeId, month: currentMonth } },
+        create: {
+          orgId, employeeId, month: currentMonth,
+          amount: total,
+          children: Number(children) || 0,
+          elderly: Number(elderly) || 0,
+          housing: Number(housing) || 0,
+          education: Number(dedEducation) || 0,
+          infant: Number(infant) || 0,
+          remark: remark || null,
+          createdBy: employeeId,
+        },
+        update: {
+          amount: total,
+          children: Number(children) || 0,
+          elderly: Number(elderly) || 0,
+          housing: Number(housing) || 0,
+          education: Number(dedEducation) || 0,
+          infant: Number(infant) || 0,
+          remark: remark || null,
+        },
+      })
+      // 同步便捷字段
+      updateData.specialDeduction = total
     }
 
     await prisma.employee.update({ where: { id: employeeId }, data: updateData })