性能：看板改为单次请求加载，从5个并发请求优化为1个

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web-antd/src/api/aiot/alarm/index.ts

@@ -98,6 +98,15 @@ export namespace AiotAlarmApi {
     hour: number;
     count: number;
   }
+
+  /** 看板聚合数据 */
+  export interface DashboardData {
+    statistics: AlertStatistics;
+    trend: TrendItem[];
+    deviceTop: DeviceTopItem[];
+    hourDistribution: HourDistItem[];
+    recentAlerts: Alert[];
+  }
 }
 
 // ==================== 告警管理 API ====================
@@ -133,6 +142,14 @@ export function deleteAlert(id: number | string) {
   return requestClient.delete(`/aiot/alarm/alert/delete?id=${id}`);
 }
 
+/** 获取看板聚合数据（单次请求） */
+export function getAlertDashboard(trendDays: number = 7) {
+  return requestClient.get<AiotAlarmApi.DashboardData>(
+    '/aiot/alarm/alert/dashboard',
+    { params: { trendDays } },
+  );
+}
+
 /** 获取告警统计 */
 export function getAlertStatistics(startTime?: string, endTime?: string) {
   return requestClient.get<AiotAlarmApi.AlertStatistics>(