feat(alert): A2 告警引擎分布式安全 — Redis 分布式锁(SetNX)

- Cache 接口新增 SetNX 方法(go-redis 原子 / redka check-then-set 单副本安全)
- AlertEngine 改造为支持分布式锁: tryAcquireLock/releaseLock/GetEngineStatus
- 多副本部署时仅 Leader 执行告警检查, 60s TTL 防死锁, fail-open 容错
- 新增 GET /alerts/engine/status 监控端点(is_leader/instance_id/lock_holder)
- 修复 GrafanaDashboard.tsx Panel.options 类型不匹配导致构建中断
- 同步未提交的前端类型安全迁移(140+ 文件)
- ROADMAP/TDD_PLAN/PROJECT_EVALUATION 三文档同步更新

验证: go build 零错误, Docker 部署 healthy, 引擎状态端点正常,
锁竞争测试通过(非 Leader 跳过检查), 5/5 核心 API 回归通过

frontend/src/components/dashboard/Dashboard.tsx

@@ -14,6 +14,7 @@ import {
   KubernetesClusterCard,
 } from './DashboardRecent';
 import { SkeletonDashboard } from '@/components/layout/SkeletonCard';
+import type { JsonData } from '@/types/common';
 
 /**
  * Dashboard - 优化后的仪表盘页面
@@ -30,13 +31,13 @@ export function Dashboard() {
   const navigate = useNavigate();
   const [initialLoading, setInitialLoading] = useState(true);
   const [refreshing, setRefreshing] = useState(false);
-  const [stats, setStats] = useState<any>(null);
-  const [servers, setServers] = useState<any[]>([]);
-  const [clusters, setClusters] = useState<any[]>([]);
-  const [alerts, setAlerts] = useState<any[]>([]);
-  const [releases, setReleases] = useState<any[]>([]);
-  const [expCerts, setExpCerts] = useState<any[]>([]);
-  const [metrics, setMetrics] = useState<any[]>([]);
+  const [stats, setStats] = useState<JsonData>(null);
+  const [servers, setServers] = useState<JsonData[]>([]);
+  const [clusters, setClusters] = useState<JsonData[]>([]);
+  const [alerts, setAlerts] = useState<JsonData[]>([]);
+  const [releases, setReleases] = useState<JsonData[]>([]);
+  const [expCerts, setExpCerts] = useState<JsonData[]>([]);
+  const [metrics, setMetrics] = useState<JsonData[]>([]);
 
   const refreshData = useCallback(async () => {
     setRefreshing(true);