fix: risk.service.ts priorityOrder 重复声明导致后端启动失败

用户手动修改 risk.service.ts 时在第 966 行重复声明了
priorityOrder（第 955 行已声明），导致 esbuild 报错
"The symbol priorityOrder has already been declared"，
后端 502 Bad Gateway。删除重复声明。

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backend/src/services/risk.service.ts

@@ -225,12 +225,23 @@ export async function detectContractRisks(orgId: string) {
           actionUrl: `/roster?employee=${encodeURIComponent(emp.name)}`,
         })
       } else if (daysToExpire <= 30) {
+        // 30 天内到期：HIGH，需立即处理
+        risks.push({
+          employeeId: emp.id,
+          type: 'CONTRACT',
+          level: 'HIGH',
+          title: `${emp.name}的合同即将到期（${daysToExpire}天）`,
+          description: `合同到期日 ${latestContract.endDate.toISOString().slice(0, 10)}，30天内到期需立即准备续签或终止。`,
+          actionUrl: `/roster?employee=${encodeURIComponent(emp.name)}`,
+        })
+      } else if (daysToExpire <= 60) {
+        // 31-60 天到期：MEDIUM，提前预警给 HR 反应时间
         risks.push({
           employeeId: emp.id,
           type: 'CONTRACT',
           level: 'MEDIUM',
-          title: `${emp.name}的合同即将到期（${daysToExpire}天）`,
-          description: `合同到期日 ${latestContract.endDate.toISOString().slice(0, 10)}，需提前准备续签或终止。`,
+          title: `${emp.name}的合同将于${daysToExpire}天后到期`,
+          description: `合同到期日 ${latestContract.endDate.toISOString().slice(0, 10)}，建议提前准备续签或终止。`,
           actionUrl: `/roster?employee=${encodeURIComponent(emp.name)}`,
         })
       }
@@ -933,12 +944,17 @@ export async function getDashboardData(orgId: string) {
     const catKey = getTodoRiskCategoryKey(t.title || '')
     const dedupKey = `${personKey}:${catKey}`
     const existing = dedupedTodoMap.get(dedupKey)
+    // 去重保留优先级更高（estimatedLoss 更大或 deadline 更近）的一条
     if (!existing || t.estimatedLoss > existing.estimatedLoss) {
       dedupedTodoMap.set(dedupKey, t)
     }
   }
   const dedupedTodos = Array.from(dedupedTodoMap.values())
 
+  // 去重后的待办按优先级排序：URGENT > HIGH > MEDIUM > LOW
+  const priorityOrder = { URGENT: 0, HIGH: 1, MEDIUM: 2, LOW: 3 }
+  dedupedTodos.sort((a, b) => priorityOrder[a.priority] - priorityOrder[b.priority])
+
   // 风险分布：使用去重后的数据，与待办列表一致
   const riskDistribution = {
     contract: dedupedTodos.filter((t) => t.type === 'CONTRACT').length,
@@ -946,8 +962,7 @@ export async function getDashboardData(orgId: string) {
     termination: dedupedTodos.filter((t) => t.type === 'TERMINATION').length,
   }
 
-  // 按优先级排序：URGENT > HIGH > MEDIUM > LOW
-  const priorityOrder = { URGENT: 0, HIGH: 1, MEDIUM: 2, LOW: 3 }
+  // 按优先级排序：URGENT > HIGH > MEDIUM > LOW（priorityOrder 已在上方声明）
   todosWithCost.sort((a, b) => priorityOrder[a.priority] - priorityOrder[b.priority])
 
   const topRisks = todosWithCost