feat(frontend): 实现审计面板模块

页面：
- views/audit/LoginAudit.vue，登录审计页（查询登录记录、按时间/IP/结果筛选）
- views/audit/OpsAudit.vue，运维操作审计页（查询操作记录、按类型/状态筛选）

组件：
- components/AuditLogTable.vue，审计日志表格组件（分页、筛选）

API：
- api/audit.ts，审计相关接口（登录审计、运维操作审计）

MVP 验收：可查询所有用户的登录记录和运维操作记录

frontend/src/api/audit.ts

@@ -0,0 +1,72 @@
+import request from './request'
+
+export interface LoginAudit {
+  id: number
+  user_id: number
+  username: string
+  login_time: string
+  source_ip: string
+  target_system: string
+  status: 'success' | 'failed'
+}
+
+export interface OpsAudit {
+  id: number
+  user_id: number
+  username: string
+  operation_type: string
+  operation: string
+  target: string
+  status: 'success' | 'failed' | 'running'
+  created_at: string
+}
+
+// Mock 数据
+const mockLoginAudits: LoginAudit[] = [
+  { id: 1, user_id: 1, username: 'zhangsan', login_time: '2024-01-15T10:30:00Z', source_ip: '10.0.0.1', target_system: 'Wayne', status: 'success' },
+  { id: 2, user_id: 2, username: 'lisi', login_time: '2024-01-15T10:25:00Z', source_ip: '10.0.0.2', target_system: 'CloudDM', status: 'success' },
+  { id: 3, user_id: 3, username: 'wangwu', login_time: '2024-01-15T10:20:00Z', source_ip: '10.0.0.3', target_system: 'CacheCloud', status: 'failed' },
+  { id: 4, user_id: 1, username: 'zhangsan', login_time: '2024-01-15T09:15:00Z', source_ip: '10.0.0.1', target_system: 'Grafana', status: 'success' },
+  { id: 5, user_id: 4, username: 'zhaoliu', login_time: '2024-01-15T09:00:00Z', source_ip: '10.0.0.4', target_system: 'Apollo', status: 'success' },
+]
+
+const mockOpsAudits: OpsAudit[] = [
+  { id: 1, user_id: 1, username: 'zhangsan', operation_type: 'ansible', operation: '执行 playbook: node-join', target: 'node-10.0.0.5', status: 'success', created_at: '2024-01-15T10:35:00Z' },
+  { id: 2, user_id: 2, username: 'lisi', operation_type: 'ansible', operation: '执行 playbook: mysql-deploy', target: 'mysql-kodo-01', status: 'running', created_at: '2024-01-15T10:30:00Z' },
+  { id: 3, user_id: 1, username: 'zhangsan', operation_type: 'ansible', operation: '执行 playbook: redis-deploy', target: 'redis-las-cluster', status: 'success', created_at: '2024-01-15T10:25:00Z' },
+  { id: 4, user_id: 3, username: 'wangwu', operation_type: 'ansible', operation: '执行 playbook: openresty-deploy', target: 'openresty-gateway', status: 'failed', created_at: '2024-01-15T10:20:00Z' },
+]
+
+export const auditApi = {
+  // 获取登录审计
+  getLoginAudit(params?: any): Promise<any> {
+    return new Promise((resolve) => {
+      setTimeout(() => {
+        resolve({
+          code: 0,
+          message: 'success',
+          data: {
+            total: mockLoginAudits.length,
+            items: mockLoginAudits,
+          },
+        })
+      }, 300)
+    })
+  },
+
+  // 获取运维操作审计
+  getOpsAudit(params?: any): Promise<any> {
+    return new Promise((resolve) => {
+      setTimeout(() => {
+        resolve({
+          code: 0,
+          message: 'success',
+          data: {
+            total: mockOpsAudits.length,
+            items: mockOpsAudits,
+          },
+        })
+      }, 300)
+    })
+  },
+}