refactor(i18n): U41 残余硬编码中文清零 — 工具函数+审计RDP标签+AIOps分析+Monitor残余+审批选项

18 文件 ~35 处 UI 硬编码中文→t()/i18n.t() 调用:
- agent-utils.ts timeAgo() 秒前/分钟前/小时前
- utils.ts formatDistanceToNow() 分钟前/小时前/天前
- request.ts 响应解析失败错误消息
- ActiveSessionsPanel/HistorySessionsPanel RDP 在线/历史会话标签
- MetricsExplorer 清除/已选/最近1小时
- HostMonitor 当前主机 subtitle
- AIAnalysisResult 证据链 (新增 useTranslation hook)
- capacity-predict.ts 容量预测摘要模板
- ApprovalResourcePage 阿里云/腾讯云/华为云
- ApprovalPermissionPage 堡垒机
- site-monitor/helpers.ts 频率/时间/证书天数格式化
- site-monitor/analytics.ts 证书剩余/检查失败/延迟波动事件
- middleware-monitor MwTargetChartsPanel/MwTrendChart/helpers.ts
- snmp-monitor SnmpMetricTrendChart/SnmpDeviceChartsPanel
- host-monitor/utils.ts 图表点数标签 + PortPolicyDialog 系统进程说明

新增 34 翻译键 (common.duration.secAgo/hourAgo/dayAgo + common.selected/
responseParseError/rdpActiveSessions/rdpHistorySessions/rdpSessionCount/
evidenceChain/last1Hour/currentHost + monitor.lbl 10键 + monitor.siteMonitor
8键 + approval.provider 3键 + approval.permType 1键 +
monitor.portPolicyDialog.systemProcessDesc + aiops.capacity.summary)

zh/en 7813→7847 对齐; tsc -b=0, npm build✓ (17.31s), ESLint=0/43/any=0,
go build=0, 17/17 测试通过

frontend/src/locales/zh-CN.json

@@ -181,7 +181,10 @@
       "minSec": "{{m}}分{{s}}秒",
       "hour": "{{count}}时",
       "hourMin": "{{h}}时{{m}}分",
-      "minAgo": "{{count}}分钟前"
+      "minAgo": "{{count}}分钟前",
+      "secAgo": "{{count}}秒前",
+      "hourAgo": "{{count}}小时前",
+      "dayAgo": "{{count}}天前"
     },
     "ebCaughtError": "[ErrorBoundary] 捕获到错误:",
     "ebCopyError": "复制错误",
@@ -623,7 +626,15 @@
     "fillIfMultiContainer": "(多容器时填写)",
     "confirmDeleteType": "确认删除 {{type}} \"{{name}}\"？",
     "unitCount": "个",
-    "fieldValues": "{{count}} 个值"
+    "fieldValues": "{{count}} 个值",
+    "selected": "{{count}} 已选",
+    "responseParseError": "响应解析失败",
+    "rdpActiveSessions": "RDP 在线会话",
+    "rdpHistorySessions": "RDP 历史会话",
+    "rdpSessionCount": "RDP 会话共 {{count}} 条",
+    "evidenceChain": "证据链",
+    "last1Hour": "最近 1 小时",
+    "currentHost": "当前主机: {{host}}"
   },
   "menu": {
     "aiAgentCli": "Agent CLI",
@@ -1478,7 +1489,15 @@
       "general": "通用审批"
     },
     "workflowSubtitle": "为资源申请、应用申请、权限审批配置多级审批流程",
-    "workflowTitle": "审批流程配置"
+    "workflowTitle": "审批流程配置",
+    "provider": {
+      "aliyun": "阿里云",
+      "tencent": "腾讯云",
+      "huawei": "华为云"
+    },
+    "permType": {
+      "bastion": "堡垒机"
+    }
   },
   "audit": {
     "csvHeader": "时间,用户,命令,输出大小,会话ID,高危",
@@ -4423,7 +4442,16 @@
       "snmpVersion": "SNMP 版本",
       "snmpNoDevice": "暂无 SNMP 设备，点击「添加设备」开始监控",
       "snmpCollectMetrics": "采集指标",
-      "snmpNoMetrics": "暂无指标，请先采集"
+      "snmpNoMetrics": "暂无指标，请先采集",
+      "noTrendData": "暂无趋势数据",
+      "noTrendDataWaiting": "暂无趋势数据，等待后台采集",
+      "selectInstanceHint": "选择左侧实例查看趋势与健康度",
+      "clickDeviceHint": "点击设备行查看 CPU / 内存 / 温度 / 风扇趋势图",
+      "noMetricsHint": "暂无可视化指标，请先完成至少一次采集",
+      "usedHint": "已用 {{value}}",
+      "clusterNodesHint": "集群 {{value}} 节点",
+      "slowQueriesHint": "慢查询 {{value}}",
+      "pointCount": "{{min}} — {{max}} · {{count}} 点"
     },
     "logAlertBell": {
       "linked": "已关联告警策略",
@@ -4813,7 +4841,8 @@
       "neverReport": "永远不上报",
       "filterMode": "过滤模式",
       "title": "端口监控策略",
-      "desc": "配置 Agent 端口上报过滤规则"
+      "desc": "配置 Agent 端口上报过滤规则",
+      "systemProcessDesc": "⚠️ 无论选择哪种模式，以下系统进程端口 {{neverReport}}：sshd、rpcbind、master、systemd、dbus-daemon、rsyslogd 等。Agent 采集时自动跳过。"
     },
     "postgresql": "PostgreSQL",
     "prevPage": "上一页",
@@ -5004,7 +5033,15 @@
       "probeDesc": "按协议类型配置探活任务，系统将按间隔自动拨测",
       "taskNotFound": "拨测任务不存在或已删除",
       "clickToObserve": "点击可观测进入详情页",
-      "alerting": "告警中"
+      "alerting": "告警中",
+      "recommendFreq": "推荐 {{freq}}，最小 {{minFreq}}",
+      "seconds": "{{count}}秒",
+      "minutes": "{{count}}分钟",
+      "hours": "{{count}}小时",
+      "certDays": "{{count}}天",
+      "certRemaining": "证书剩余 {{days}} 天",
+      "checkFailed": "{{label}}失败",
+      "latencyFluctuation": "{{label}}延迟波动"
     },
     "siteProbe": "站点拨测",
     "siteProbeTitle": "站点拨测任务",
@@ -7933,7 +7970,8 @@
       "expertPrompt": "你是 AIOps 容量规划专家。基于以下服务器资源容量预测数据，给出综合风险评估与可执行的运维建议：",
       "resCpu": "服务器CPU算力",
       "resMemory": "服务器内存",
-      "resDisk": "存储磁盘空间"
+      "resDisk": "存储磁盘空间",
+      "summary": "- {{resource}}：当前 {{current}}% → 7天后预测 {{predicted}}%（阈值 {{threshold}}%），{{risk}}"
     },
     "capacityPlanPrompt": "根据以下主机资源使用数据，提供成本优化和容量规划建议（识别闲置/过载主机，给出缩容/扩容建议）",
     "capacityPlanning": "容量规划",