feat(q1): 前端类型安全治理完成 — any 83→40, P0 全部 done

- types/monitor.ts: 新增 6 个运行时记录类型(AlertEventRecord/AlertRuleRecord/
  AgentHostRecord/CronJobRecord/CertExpiryRecord/ApprovalWorkflowStepRecord)
- types/common.ts: 新增 OptionItem 通用下拉类型
- 组件级 any 清理 43 处:
  - AlertEventsTab/AlertRulesTab/AlertChannelDialog/alertShared (19处)
  - AuditOperationsTab normalizeLog + 筛选器 (8处)
  - CronJobManager 任务列表/编辑/操作 (6处)
  - AgentMonitor 主机列表/命令执行 (5处)
  - DashboardRecent 5 张卡片组件 (5处)
  - AlertManager 状态类型对齐 (联动修复)
  - Dashboard.tsx 调用端类型对齐 (联动修复)
- AlertChannel 接口新增 test_status 字段
- ESLint any: 83→40 (<50 目标达成)
- tsc -b / tsc --noEmit: 零错误
- npm run build: ✓ built in 17.11s
- 9/9 核心 API 回归通过

frontend/src/types/common.ts

@@ -37,6 +37,12 @@ export const ErrorCode = {
   INTERNAL_ERROR: 500,
 } as const;
 
+// 下拉选项通用类型（模块/操作类型等筛选器）
+export interface OptionItem {
+  value: string;
+  label: string;
+}
+
 // WebSocket 消息
 export interface WsMessage<T = unknown> {
   type: string;

frontend/src/types/monitor.ts

@@ -175,6 +175,7 @@ export interface AlertChannel {
   config: string; // JSON string
   enabled: boolean;
   description: string;
+  test_status?: string;
 }
 
 // ===== 健康探针 =====
@@ -371,3 +372,113 @@ export interface GrafanaDashboard {
   createdBy: string;
   isDefault: boolean;
 }
+
+// ===== 运行时记录类型（与后端 API 响应 JSON 对齐，snake_case）=====
+
+/** 告警事件运行时记录 — GET /alerts 返回，字段高度动态 */
+export interface AlertEventRecord {
+  id: number;
+  rule?: { id: number; name: string };
+  rule_id?: number;
+  rule_name?: string;
+  severity: string;
+  status: string;
+  message: string;
+  target: string;
+  value?: number;
+  threshold?: number;
+  started_at?: string;
+  resolved_at?: string;
+  created_at?: string;
+  acked?: boolean;
+}
+
+/** 告警规则运行时记录 — GET /alerts/rules 返回 */
+export interface AlertRuleRecord {
+  id: number;
+  name: string;
+  metric?: string;
+  operator?: string;
+  threshold?: number;
+  duration?: number;
+  duration_sec?: number;
+  severity: string;
+  enabled: boolean;
+  description?: string;
+  notify_channels?: string | (number | string)[];
+  server_id?: number;
+  server_hostname?: string;
+  type?: string;
+  source?: string;
+  expression?: string;
+  created_at?: string;
+  updated_at?: string;
+}
+
+/** Agent 主机运行时记录 — GET /agent/latest 返回 */
+export interface AgentHostRecord {
+  id?: number;
+  hostname: string;
+  ip?: string;
+  agent_version?: string;
+  os?: string;
+  kernel?: string;
+  status?: string;
+  agent_status?: string;
+  last_seen?: string;
+  last_report?: string;
+  last_reported_at?: string;
+  updated_at?: string;
+  cpu_percent?: number;
+  cpu?: number;
+  mem_percent?: number;
+  mem?: number;
+  disk_percent?: number;
+  disk?: number;
+  ports?: unknown[];
+  [key: string]: unknown;
+}
+
+/** 定时任务运行时记录 — GET /cron-jobs 返回 */
+export interface CronJobRecord {
+  id: number;
+  name: string;
+  description?: string;
+  enabled: boolean;
+  cron?: string;
+  cron_expr?: string;
+  command?: string;
+  content?: string;
+  script?: { name: string; [key: string]: unknown } | null;
+  type?: string;
+  target_type?: string;
+  targets?: string[];
+  success_count?: number;
+  fail_count?: number;
+  run_count?: number;
+  created_at?: string;
+  updated_at?: string;
+  last_run_at?: string;
+  last_status?: string;
+  [key: string]: unknown;
+}
+
+/** 域名证书到期记录 */
+export interface CertExpiryRecord {
+  id?: number | string;
+  domain: string;
+  name?: string;
+  expire_date: string;
+  days_until_expiry?: number;
+  [key: string]: unknown;
+}
+
+/** 审批工作流步骤运行时记录 */
+export interface ApprovalWorkflowStepRecord {
+  id?: number;
+  step_order: number;
+  step_type: 'submit' | 'audit' | 'execute' | string;
+  name: string;
+  approver_ids?: number[];
+  description?: string;
+}