feat: 电子签全场景集成+场景筛选+设置开关

- ESignRecord 模型新增 scene 字段（CONTRACT/RESIGNATION/POLICY/PAYSLIP/ONBOARDING）
- Organization 模型新增3个电子签开关：esignPolicyEnabled/esignPayslipEnabled/esignOnboardingEnabled
- 设置页面企业信息新增电子签署设置区域，3个开关各自独立，缺省关闭
- 规章制度签收：开启电子签后，员工阅读确认时自动创建POLICY场景签署记录
- 工资条确认：开启电子签后，员工确认工资条时自动创建PAYSLIP场景签署记录
- 入职文件签署：开启电子签后，HR审批通过入职流程时自动创建ONBOARDING场景签署记录
- 电子签署列表增加场景筛选下拉（全部场景/劳动合同/离职协议/规章制度/工资条/入职文件）
- 管理端和员工端列表均展示场景标签（基于scene字段，替代硬编码判断）
- 合同和离职流程的esign调用已加scene参数

backend/src/routes/portal.routes.ts

@@ -171,6 +171,25 @@ router.post('/payslip/:id/confirm', portalAuth, async (req: any, res, next) => {
       events: [{ action: '工资条确认', timestamp: new Date().toISOString(), ip: req.ip, userAgent: req.headers['user-agent'] }],
       createdBy: req.employee.id,
     }).catch(() => {})
+
+    // 如果开启了工资条电子签，创建电子签记录
+    const org = await prisma.organization.findUnique({ where: { id: req.employee.orgId }, select: { esignPayslipEnabled: true } })
+    if (org?.esignPayslipEnabled) {
+      await prisma.eSignRecord.create({
+        data: {
+          orgId: req.employee.orgId,
+          employeeId: req.employee.id,
+          scene: 'PAYSLIP',
+          documentTitle: `工资条确认：${payslip.month}`,
+          status: 'PENDING',
+          initiatedBy: req.employee.id,
+          createdBy: req.employee.id,
+          remark: '工资条确认时自动发起',
+          expiredAt: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000),
+        },
+      })
+    }
+
     res.json({ success: true })
   } catch (err) {
     next(err)
@@ -544,6 +563,27 @@ router.post('/policies/:id/read', portalAuth, async (req: Request, res: Response
         userAgent: req.headers['user-agent'] || null,
       },
     })
+
+    // 如果开启了制度电子签，创建电子签记录
+    const org = await prisma.organization.findUnique({ where: { id: orgId }, select: { esignPolicyEnabled: true } })
+    if (org?.esignPolicyEnabled) {
+      const policyDoc = await prisma.policyDocument.findUnique({ where: { id: req.params.id }, select: { title: true, content: true } })
+      await prisma.eSignRecord.create({
+        data: {
+          orgId,
+          employeeId,
+          scene: 'POLICY',
+          documentTitle: `制度签收：${policyDoc?.title || '未知'}`,
+          documentContent: policyDoc?.content || null,
+          status: 'PENDING',
+          initiatedBy: employeeId,
+          createdBy: employeeId,
+          remark: '制度阅读确认后自动发起',
+          expiredAt: new Date(Date.now() + 30 * 24 * 60 * 60 * 1000),
+        },
+      })
+    }
+
     res.json({ success: true, data: { readAt: record.readAt.toISOString() } })
   } catch (err) {
     next(err)