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/WebShell.tsx

@@ -31,6 +31,7 @@ import { FitAddon } from 'xterm-addon-fit';
 import 'xterm/css/xterm.css';
 import { serverApi } from '@/api';
 import { useUserStore } from '@/store';
+import type { JsonData } from '@/types/common';
 
 interface TerminalSession {
   id: string;
@@ -48,7 +49,7 @@ interface TermEntry {
 }
 
 export function WebShell() {
-  const [servers, setServers] = useState<any[]>([]);
+  const [servers, setServers] = useState<JsonData[]>([]);
   const [sessions, setSessions] = useState<TerminalSession[]>([]);
   const [activeSession, setActiveSession] = useState<string | null>(null);
   const [selectedServer, setSelectedServer] = useState<string>('');
@@ -62,7 +63,7 @@ export function WebShell() {
 
   const loadServers = async () => {
     try {
-      const res: Record<string, any> = await serverApi.getServers();
+      const res: JsonData = await serverApi.getServers();
       setServers(res?.list || []);
     } catch (e) {
       console.error('加载服务器列表失败:', e);
@@ -257,15 +258,15 @@ export function WebShell() {
             try { entry.fit.fit(); } catch { /* noop */ }
           });
           observer.observe(el);
-          (entry as any)._observer = observer;
+          (entry as JsonData)._observer = observer;
         } catch (e) {
           console.error('打开终端失败:', e);
         }
       }
     } else {
       const entry = termsRef.current.get(sessionId);
-      if (entry && (entry as any)._observer) {
-        (entry as any)._observer.disconnect();
+      if (entry && (entry as JsonData)._observer) {
+        (entry as JsonData)._observer.disconnect();
       }
       containerRef.current.delete(sessionId);
     }