fix: 修复风险扫描去重key不匹配导致大量重复数据，Dashboard风险提醒按员工聚合

frontend/src/pages/Dashboard.tsx

@@ -978,8 +978,14 @@ export default function Dashboard() {
                       <Link to={todo.actionUrl} className="flex items-center gap-2.5 flex-1">
                         <TodoIcon type={todo.type} level={todo.level} />
                         <div className="flex flex-col">
-                          <div className="flex items-center gap-1.5">
-                            <span className="text-xs text-gray-800">{todo.title}</span>
+                          <div className="flex items-center gap-1.5 flex-wrap">
+                            {todo.employeeName && (
+                              <span className="text-xs font-bold text-gray-900">{todo.employeeName}</span>
+                            )}
+                            {todo.employeeDepartment && (
+                              <span className="text-xs text-gray-400">{todo.employeeDepartment}</span>
+                            )}
+                            <span className="text-xs text-gray-700">{todo.title}</span>
                             {todo.priority && priorityConfig[todo.priority] && (
                               <span className={`px-1 py-0.5 rounded text-xs font-medium ${priorityConfig[todo.priority].bg} ${priorityConfig[todo.priority].color}`}>
                                 {priorityConfig[todo.priority].label}

frontend/src/types/index.ts

@@ -108,6 +108,8 @@ export interface DashboardData {
     lossRange: [number, number] | null
     deadline: string | null
     daysUntilDeadline: number | null
+    employeeName: string | null
+    employeeDepartment: string | null
   }[]
   resolvedTodos: {
     id: string