feat(i18n): 安全审计模块全量国际化 — 7 文件硬编码中文改翻译键 + audit 命名空间(89 键)

迁移文件:
- AuditOperationsTab.tsx — 操作审计(搜索/筛选/虚拟滚动表格/详情弹窗/统计弹窗)
- TerminalAuditTab.tsx — 终端审计子标签(在线/历史/命令)
- LoginLogsTab.tsx — 登录日志(DataTable + 状态筛选 + 登录方式)
- ActiveSessionsPanel.tsx — 在线会话(自动刷新 + 阻断确认 + 实时监控)
- HistorySessionsPanel.tsx — 历史会话(回放/下载录制)
- SessionCommandsPanel.tsx — 会话命令(虚拟滚动)
- helpers.tsx — formatDuration/getStatusBadge (i18n.t 非组件模式)

翻译键: audit 命名空间 89 键 (operations/login/terminal 三子域)
  + common.duration 时长单位(秒/分/时)
总键数: 481→610, 命名空间: 8→9 (common/menu/header/login/dashboard/server/alert/approval/audit)
zh-CN/en-US 完全对齐, tsc -b=0, npm build✓, 17/17 测试通过

frontend/src/locales/zh-CN.json

@@ -71,7 +71,14 @@
     "operationSuccess": "操作成功",
     "operationFailed": "操作失败",
     "loadFailed": "加载失败",
-    "saveFailed": "保存失败"
+    "saveFailed": "保存失败",
+    "duration": {
+      "sec": "{{count}}秒",
+      "min": "{{count}}分",
+      "minSec": "{{m}}分{{s}}秒",
+      "hour": "{{count}}时",
+      "hourMin": "{{h}}时{{m}}分"
+    }
   },
   "menu": {
     "dashboard": "仪表盘",
@@ -545,5 +552,107 @@
       "templateNotLoaded": "模板未加载",
       "pleaseFill": "请填写「{{label}}」"
     }
+  },
+  "audit": {
+    "operations": {
+      "searchPlaceholder": "搜索操作日志...",
+      "allModules": "全部模块",
+      "allActions": "全部操作",
+      "noData": "暂无操作日志",
+      "viewDetail": "查看详情",
+      "totalLogs": "共 {{count}} 条日志",
+      "virtualScroll": "虚拟滚动渲染",
+      "detailTitle": "操作日志详情",
+      "statsTitle": "审计统计",
+      "noStats": "暂无统计数据",
+      "topModules": "热门模块",
+      "topUsers": "活跃用户",
+      "col": {
+        "time": "时间",
+        "user": "用户",
+        "module": "模块",
+        "actionType": "操作类型",
+        "resource": "资源",
+        "ip": "IP",
+        "result": "结果",
+        "detail": "详情"
+      },
+      "detailCol": {
+        "userId": "用户ID",
+        "ipAddress": "IP地址",
+        "userAgent": "User-Agent",
+        "message": "详情"
+      },
+      "stats": {
+        "totalLogs": "总日志数",
+        "todayLogs": "今日日志",
+        "successCount": "成功数",
+        "failureCount": "失败数"
+      }
+    },
+    "login": {
+      "searchPlaceholder": "搜索用户/IP/归属地...",
+      "noData": "暂无登录日志",
+      "all": "全部",
+      "col": {
+        "loginTime": "登录时间",
+        "user": "用户",
+        "loginType": "登录方式",
+        "ip": "IP",
+        "location": "归属地",
+        "browser": "浏览器/OS",
+        "status": "状态"
+      },
+      "type": {
+        "password": "密码登录",
+        "ldap": "LDAP",
+        "token": "Token",
+        "oauth": "OAuth"
+      }
+    },
+    "terminal": {
+      "searchUserServer": "搜索用户/服务器...",
+      "searchUserServerIp": "搜索用户/服务器/IP...",
+      "searchUserCommand": "搜索用户/命令...",
+      "sessionIdPlaceholder": "会话 ID（可选）",
+      "noActive": "暂无在线会话",
+      "noHistory": "暂无历史会话",
+      "noCommands": "暂无会话命令记录",
+      "totalCommands": "共 {{count}} 条命令",
+      "virtualScroll": "虚拟滚动渲染",
+      "autoRefresh": "自动刷新",
+      "autoRefreshHintOn": "每 {{sec}}s 自动刷新 · 点击关闭",
+      "autoRefreshHintOff": "点击开启自动刷新",
+      "killTitle": "阻断会话",
+      "killConfirm": "确认强制断开用户「{{user}}」的当前会话吗？",
+      "killConfirmBtn": "阻断",
+      "liveMonitor": "实时查看",
+      "replay": "回放",
+      "downloadRecord": "下载录制",
+      "tab": {
+        "active": "在线会话",
+        "history": "历史会话",
+        "commands": "会话命令"
+      },
+      "col": {
+        "id": "ID",
+        "user": "用户",
+        "targetServer": "目标服务器",
+        "port": "端口",
+        "startTime": "开始时间",
+        "endTime": "结束时间",
+        "duration": "时长",
+        "status": "状态",
+        "actions": "操作",
+        "command": "命令",
+        "outputSize": "输出大小",
+        "sessionRef": "关联会话"
+      },
+      "status": {
+        "active": "活动中",
+        "failed": "失败",
+        "closed": "已关闭"
+      }
+    }
   }
 }