feat: 电子签署导航调整+员工手机端电子签署功能

- 管理端导航：电子签署移到首页分组（工作日历下）
- 员工端新增电子签署页面（MyEsign.tsx）：
  - 查看自己的签署记录列表，支持待签/已签/已取消状态
  - 查看签署详情，含文件内容、关联合同标识
  - 确认签署操作（框架阶段，对接易签宝后跳转签署页面）
- 员工端导航（PortalNav）增加电子签署入口
- 员工首页（EmployeeHome）增加电子签署快捷入口
- 员工首页待办事项增加待签署文件提醒
- 后端portal路由新增3个接口：GET /esign、GET /esign/:id、POST /esign/:id/sign

backend/src/routes/portal.routes.ts

@@ -705,6 +705,14 @@ router.get('/home/overview', portalAuth, async (req: any, res, next) => {
     if (unreadPolicies.length > 0) {
       pendingTasks.push({ severity: 'medium', message: `您有 ${unreadPolicies.length} 份制度待阅读确认` })
     }
+    // 待签署文件
+    const pendingEsign = await prisma.eSignRecord.findMany({
+      where: { employeeId, orgId, status: 'PENDING' },
+      select: { id: true, documentTitle: true },
+    })
+    if (pendingEsign.length > 0) {
+      pendingTasks.push({ severity: 'high', message: `您有 ${pendingEsign.length} 份文件待签署（${pendingEsign.map(e => e.documentTitle).join('、')}）` })
+    }
 
     res.json({
       success: true,
@@ -903,4 +911,60 @@ router.post('/leaves/:id/cancel', portalAuth, async (req: any, res, next) => {
   } catch (err) { next(err) }
 })
 
+// ========== 员工端：电子签署 ==========
+// 查看自己的签署记录列表
+router.get('/esign', portalAuth, async (req: any, res, next) => {
+  try {
+    const { id: employeeId, orgId } = req.employee
+    const records = await prisma.eSignRecord.findMany({
+      where: { employeeId, orgId },
+      orderBy: { createdAt: 'desc' },
+    })
+    res.json({ success: true, data: records })
+  } catch (err) { next(err) }
+})
+
+// 查看签署详情
+router.get('/esign/:id', portalAuth, async (req: any, res, next) => {
+  try {
+    const { id: employeeId, orgId } = req.employee
+    const record = await prisma.eSignRecord.findFirst({
+      where: { id: req.params.id, employeeId, orgId },
+    })
+    if (!record) return res.status(404).json({ success: false, error: { message: '记录不存在' } })
+    res.json({ success: true, data: record })
+  } catch (err) { next(err) }
+})
+
+// 员工签署操作（预留：对接易签宝后跳转到签署页面或提交签署结果）
+router.post('/esign/:id/sign', portalAuth, async (req: any, res, next) => {
+  try {
+    const { id: employeeId, orgId } = req.employee
+    const record = await prisma.eSignRecord.findFirst({
+      where: { id: req.params.id, employeeId, orgId, status: 'PENDING' },
+    })
+    if (!record) return res.status(404).json({ success: false, error: { message: '记录不存在或已处理' } })
+
+    // 预留：对接易签宝后，此处应跳转到易签宝签署页面或接收签署结果
+    // 当前框架阶段：直接标记为已签署
+    const updated = await prisma.eSignRecord.update({
+      where: { id: record.id },
+      data: {
+        status: 'COMPLETED',
+        completedAt: new Date(),
+      },
+    })
+
+    // 如果关联了合同，更新合同签署信息
+    if (record.contractId) {
+      await prisma.laborContract.update({
+        where: { id: record.contractId },
+        data: { signMethod: 'ELECTRONIC' },
+      })
+    }
+
+    res.json({ success: true, data: updated, message: '签署成功' })
+  } catch (err) { next(err) }
+})
+
 export default router