feat: 预入职状态+入职手续待办

1. 花名册动态状态：hireDate > today 显示「预入职」(蓝色标签)
2. RiskType 增加 ONBOARDING 枚举
3. 新增 detectOnboardingRisks：入职日期到但未签合同→生成待办
4. detectContractRisks 排除预入职员工（未到入职日期不检查合同）
5. Dashboard 风险提醒 tab 支持 ONBOARDING 待办类型
6. 前端类型定义同步更新

backend/prisma/schema.prisma

@@ -42,6 +42,7 @@ enum RiskType {
   SALARY
   TERMINATION
   MONTHLY
+  ONBOARDING
 }
 
 enum RiskLevel {

backend/src/routes/roster.routes.ts

@@ -58,11 +58,13 @@ router.get('/', authMiddleware, async (req: AuthRequest, res, next) => {
             contractType: 'UNSIGNED',
             hireDate: e.hireDate,
           })
+      const isResigned = e.terminations.some((t) => t.terminationDate <= today)
+      const isPreHire = !isResigned && e.hireDate > today
       return {
         id: e.id,
         name: e.name,
         department: e.department,
-        status: e.terminations.some((t) => t.terminationDate <= today) ? 'RESIGNED' : 'ACTIVE',
+        status: isResigned ? 'RESIGNED' : (isPreHire ? 'PRE_HIRE' : 'ACTIVE'),
         hasTermination: e.terminations.length > 0,
         latestTerminationDate: e.terminations[0]?.terminationDate || null,
         latestTerminationType: e.terminations[0]?.type || null,

backend/src/services/risk.service.ts

@@ -7,8 +7,10 @@ function daysBetween(a: Date, b: Date): number {
 }
 
 export async function detectContractRisks(orgId: string) {
+  const today = new Date()
+  today.setHours(0, 0, 0, 0)
   const employees = await prisma.employee.findMany({
-    where: { orgId, status: 'ACTIVE' },
+    where: { orgId, status: 'ACTIVE', hireDate: { lte: today } },
     include: { contracts: { orderBy: { createdAt: 'desc' } } },
   })
 
@@ -98,6 +100,43 @@ export async function detectContractRisks(orgId: string) {
   return risks
 }
 
+// 预入职检查：入职日期已到但未签合同 → 待办
+export async function detectOnboardingRisks(orgId: string) {
+  const today = new Date()
+  today.setHours(0, 0, 0, 0)
+  const employees = await prisma.employee.findMany({
+    where: { orgId, status: 'ACTIVE', hireDate: { lte: today } },
+    include: {
+      contracts: { orderBy: { createdAt: 'desc' }, take: 1 },
+      terminations: { where: { terminationDate: { lte: today } }, take: 1 },
+    },
+  })
+
+  const risks: { employeeId: string; type: RiskType; level: RiskLevel; title: string; description: string; actionUrl: string }[] = []
+
+  for (const emp of employees) {
+    // 已离职的跳过
+    if (emp.terminations.length > 0) continue
+
+    const latestContract = emp.contracts[0]
+    const hasSignedContract = latestContract && latestContract.contractType !== 'UNSIGNED'
+
+    if (!hasSignedContract) {
+      const daysSinceHire = daysBetween(today, emp.hireDate)
+      risks.push({
+        employeeId: emp.id,
+        type: 'ONBOARDING',
+        level: daysSinceHire > 30 ? 'HIGH' : 'MEDIUM',
+        title: `${emp.name}入职手续未完成${daysSinceHire > 30 ? `（已超${daysSinceHire}天）` : ''}`,
+        description: `入职日期 ${emp.hireDate.toISOString().slice(0, 10)}，尚未签订劳动合同，请尽快完成入职手续。`,
+        actionUrl: `/roster?employee=${encodeURIComponent(emp.name)}`,
+      })
+    }
+  }
+
+  return risks
+}
+
 export async function detectTerminationRisks(orgId: string) {
   const employees = await prisma.employee.findMany({
     where: { orgId, status: 'ACTIVE' },
@@ -206,10 +245,11 @@ export async function runRiskDetection(orgId: string) {
 
   const contractRisks = await detectContractRisks(orgId)
   const terminationRisks = await detectTerminationRisks(orgId)
+  const onboardingRisks = await detectOnboardingRisks(orgId)
   const monthlyTasks = await detectMonthlyTasks(orgId)
 
   // 月度任务用 monthlyKeys 去重，其他任务用 existingKeys 去重
-  const nonMonthlyRisks = [...contractRisks, ...terminationRisks]
+  const nonMonthlyRisks = [...contractRisks, ...terminationRisks, ...onboardingRisks]
   const toCreate = [
     ...nonMonthlyRisks.filter((r) => !existingKeys.has(`${r.employeeId}:${r.title}`)),
     ...monthlyTasks.filter((r) => !monthlyKeys.has(`${r.employeeId}:${r.title}`)),

frontend/src/pages/Dashboard.tsx

@@ -1,7 +1,7 @@
 import { useState } from 'react'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query'
 import { Link } from 'react-router-dom'
-import { Users, AlertTriangle, CheckSquare, DollarSign, ArrowRight, RefreshCw, FileText, Calendar, TrendingUp, Briefcase, Calculator, Wallet, Building2, Receipt, Check, X, Clock, LayoutDashboard, ListTodo, ShieldAlert } from 'lucide-react'
+import { Users, AlertTriangle, CheckSquare, DollarSign, ArrowRight, RefreshCw, FileText, Calendar, TrendingUp, Briefcase, Calculator, Wallet, Building2, Receipt, Check, X, Clock, LayoutDashboard, ListTodo, ShieldAlert, UserPlus } from 'lucide-react'
 import api from '../lib/api'
 import Card from '../components/ui/Card'
 import Button from '../components/ui/Button'
@@ -18,6 +18,7 @@ const TODO_ICON_CONFIG: Record<string, { icon: typeof FileText; color: string; b
   SALARY: { icon: DollarSign, color: 'text-amber-600', bg: 'bg-amber-50' },
   TERMINATION: { icon: ShieldAlert, color: 'text-red-600', bg: 'bg-red-50' },
   MONTHLY: { icon: Calendar, color: 'text-purple-600', bg: 'bg-purple-50' },
+  ONBOARDING: { icon: UserPlus, color: 'text-cyan-600', bg: 'bg-cyan-50' },
 }
 
 function TodoIcon({ type, level }: { type: string; level: string }) {
@@ -53,7 +54,7 @@ export default function Dashboard() {
     onSuccess: () => queryClient.invalidateQueries({ queryKey: ['dashboard'] }),
   })
 
-  const riskTodos = data?.todos.filter((t) => t.type === 'CONTRACT' || t.type === 'TERMINATION') || []
+  const riskTodos = data?.todos.filter((t) => t.type === 'CONTRACT' || t.type === 'TERMINATION' || t.type === 'ONBOARDING') || []
   const taskTodos = data?.todos.filter((t) => t.type === 'MONTHLY' || t.type === 'SALARY') || []
   const filteredTodos = activeTab === 'risk' ? riskTodos : taskTodos
 

frontend/src/pages/Roster.tsx

@@ -133,8 +133,12 @@ export default function Roster() {
                     <td className="py-2 px-3 font-medium">{e.name}</td>
                     <td className="py-2 px-3 text-gray-500">{e.department}</td>
                     <td className="py-2 px-3">
-                      <span className={`px-2 py-0.5 rounded text-xs ${e.status === 'ACTIVE' ? 'bg-green-50 text-safe' : 'bg-gray-100 text-gray-500'}`}>
-                        {e.status === 'ACTIVE' ? '在职' : '离职'}
+                      <span className={`px-2 py-0.5 rounded text-xs ${
+                        e.status === 'ACTIVE' ? 'bg-green-50 text-safe'
+                        : e.status === 'PRE_HIRE' ? 'bg-blue-50 text-blue-600'
+                        : 'bg-gray-100 text-gray-500'
+                      }`}>
+                        {e.status === 'ACTIVE' ? '在职' : e.status === 'PRE_HIRE' ? '预入职' : '离职'}
                       </span>
                     </td>
                     <td className="py-2 px-3 text-gray-500">{e.hireDate?.toString().slice(0, 10)}</td>

frontend/src/types/index.ts

@@ -85,7 +85,7 @@ export interface DashboardData {
   }
   todos: {
     id: string
-    type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY'
+    type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY' | 'ONBOARDING'
     level: 'high' | 'medium' | 'low'
     title: string
     description: string
@@ -93,7 +93,7 @@ export interface DashboardData {
   }[]
   resolvedTodos: {
     id: string
-    type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY'
+    type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY' | 'ONBOARDING'
     level: 'high' | 'medium' | 'low'
     title: string
     description: string