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/server/ServerManager.tsx

@@ -48,6 +48,7 @@ import { useUserStore } from '@/store';
 import { CloudServerImport } from './CloudServerImport';
 import { TerminalDialog } from './TerminalDialog';
 import { ServerFileBrowser } from './ServerFileBrowser';
+import type { JsonData } from '@/types/common';
 import { ExcelServerImport } from './ExcelServerImport';
 import { ServerForm, EMPTY_FORM, type ServerFormData } from './ServerForm';
 import { getTags } from './serverHelpers';
@@ -95,12 +96,12 @@ export function ServerManager() {
   const servers = data?.list ?? [];
   const total = data?.total ?? 0;
 
-  const openTerminal = ( server: any) => {
+  const openTerminal = (server: JsonData) => {
     setTerminalServer({ id: server.id, name: server.hostname, ip: server.ip, hasAuth: server.has_auth ?? true });
     setTerminalOpen(true);
   };
 
-  const openFileBrowser = ( server: any) => {
+  const openFileBrowser = (server: JsonData) => {
     setFileBrowserServer({ id: server.id, name: server.hostname });
     setFileBrowserOpen(true);
   };
@@ -258,7 +259,7 @@ export function ServerManager() {
   };
 
   // 打开编辑表单
-  const openEditForm = ( server: any) => {
+  const openEditForm = (server: JsonData) => {
     setEditingId(server.id);
     setFormData({
       hostname: server.hostname || '',