refactor: 移除SQL审计+站内导航，AIOps子菜单6→3精简，服务器批量删除加确认框

- 移除SQL审计菜单和路由
- 移除站内导航菜单和路由
- AIOps智能子菜单从6个精简为3个：智能助手、告警分析、容量预测
- 移除智能运维中心(空壳)、故障诊断(与告警分析重复)、脚本生成(并入助手)
- 服务器删除/批量删除添加Dialog确认框
- 删除/批量删除添加toast成功反馈

frontend/src/components/server/ServerManager.tsx

@@ -46,6 +46,8 @@ import {
   RefreshCw,
 } from 'lucide-react';
 import { serverApi } from '@/services/api';
+import { useConfirm } from '@/components/ui/confirm-dialog';
+import { toast } from 'sonner';
 import type { Server as ServerType } from '@/types';
 import { CloudServerImport } from './CloudServerImport';
 import { TerminalDialog } from './TerminalDialog';
@@ -53,6 +55,7 @@ import { ExcelServerImport } from './ExcelServerImport';
 import { ServerForm, EMPTY_FORM, type ServerFormData } from './ServerForm';
 
 export function ServerManager() {
+  const confirm = useConfirm();
   const [servers, setServers] = useState<any[]>([]);
   const [loading, setLoading] = useState(true);
   const [selectedServers, setSelectedServers] = useState<string[]>([]);
@@ -136,23 +139,42 @@ export function ServerManager() {
   };
 
   const handleDelete = async (id: string) => {
+    const server = servers.find((s) => String(s.id) === String(id));
+    const ok = await confirm({
+      title: '删除服务器',
+      description: `确定删除「${server?.hostname || id}」吗？此操作不可撤销。`,
+      confirmText: '删除',
+      variant: 'destructive',
+    });
+    if (!ok) return;
     try {
       await serverApi.deleteServer(id);
+      toast.success('服务器已删除');
       loadData();
     } catch (e) {
       console.error('删除服务器失败:', e);
+      toast.error('删除失败');
     }
   };
 
   // 批量删除
   const handleBatchDelete = async () => {
     if (selectedServers.length === 0) return;
+    const ok = await confirm({
+      title: '批量删除服务器',
+      description: `确定删除选中的 ${selectedServers.length} 台服务器吗？此操作不可撤销。`,
+      confirmText: '批量删除',
+      variant: 'destructive',
+    });
+    if (!ok) return;
     try {
       await serverApi.batchDelete(selectedServers.map((id) => Number(id)));
+      toast.success(`已删除 ${selectedServers.length} 台服务器`);
       setSelectedServers([]);
       loadData();
     } catch (e) {
       console.error('批量删除失败:', e);
+      toast.error('批量删除失败');
     }
   };