feat: 系统优化Phase2 - 面包屑导航/侧边栏间距/制度公示阅读签收/模板变量中文化/通知类型补全

- 面包屑导航组件，集成至TopNav header
- 侧边栏菜单分组间距增大，分组间分隔线
- 制度公示员工阅读签收：PolicyReadRecord模型、portal路由、管理端阅读统计
- 修复Policies.tsx民主程序推进bug（字段名/API路径/参数）
- 用工文本模板变量名英文转中文显示
- 通知类型TYPE_LABELS补全(RISK_ALERT/SOCIAL_INS/OVERTIME_ALERT/PAYSLIP_READY)
- 通知示例数据补充
- h2标题统一为text-sm font-medium
- 新增run.md

frontend/src/types/index.ts

@@ -83,13 +83,31 @@ export interface DashboardData {
     todoCount: number
     monthlyOvertimePay: number
   }
+  urgentRisk: {
+    id: string
+    type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY' | 'ONBOARDING'
+    level: 'high' | 'medium' | 'low'
+    priority: 'URGENT' | 'HIGH' | 'MEDIUM' | 'LOW'
+    title: string
+    description: string
+    actionUrl: string
+    estimatedLoss: number
+    lossRange: [number, number] | null
+    deadline: string | null
+    daysUntilDeadline: number | null
+  } | null
   todos: {
     id: string
     type: 'CONTRACT' | 'SALARY' | 'TERMINATION' | 'MONTHLY' | 'ONBOARDING'
     level: 'high' | 'medium' | 'low'
+    priority: 'URGENT' | 'HIGH' | 'MEDIUM' | 'LOW'
     title: string
     description: string
     actionUrl: string
+    estimatedLoss: number
+    lossRange: [number, number] | null
+    deadline: string | null
+    daysUntilDeadline: number | null
   }[]
   resolvedTodos: {
     id: string
@@ -105,13 +123,22 @@ export interface DashboardData {
     salary: number
     termination: number
   }
+  riskTrend: {
+    thisMonth: number
+    lastMonth: number
+    change: number
+  }
   topRisks: {
     id: string
     type: string
     level: string
+    priority: 'URGENT' | 'HIGH' | 'MEDIUM' | 'LOW'
     title: string
     description: string
     employeeName: string | null
+    estimatedLoss: number
+    deadline: string | null
+    daysUntilDeadline: number | null
     actionUrl: string
   }[]
   aiPrediction: {