feat: ServerManager 死按钮清理+CSV导出+统计卡片提取; 审批/导航后端拆分; DialogDescription修复; AppRelease重试按钮实现

frontend/src/components/monitor/alert-center/AlertCenterDetail.tsx

@@ -26,6 +26,7 @@ export function AlertDetailDialog({
             {alert?.title}
             {alert && getSeverityBadge(alert.severity)}
           </DialogTitle>
+          <DialogDescription className="sr-only">查看告警详情</DialogDescription>
         </DialogHeader>
         {alert && (
           <div className="space-y-4">