feat(i18n): 剩余模块全量国际化 — 51% 覆盖率 (231 文件接入 t())

批量转换 163 个文件，3204 处中文替换为 t() 调用：
- Monitor: 日志中心/告警中心/数据源/大屏/站点拨测/SNMP/中间件 全部转换
- Kubernetes: ResourceVisualEditor/NamespaceResourcePage/拓扑/事件 全部转换
- Deploy: 流水线/发布/凭证/RBAC 全部转换
- Server/Cloud/Agent/Task/Layout/UI: 全部转换
- 翻译词典扩展至 6474 行 (22 namespaces, 5000+ keys)
- tsc 编译零错误

frontend/src/components/monitor/log-center/LogHistogram.tsx

@@ -2,6 +2,7 @@
 import { useMemo } from 'react';
 import { AreaChart, Area, XAxis, YAxis, CartesianGrid, Tooltip, ResponsiveContainer } from 'recharts';
 import type { LogEngine } from './types-v3';
+import { useTranslation } from 'react-i18next';
 
 interface LogHistogramProps {
   data: { timestamp: string; count: number }[];
@@ -31,6 +32,7 @@ function formatBytes(bytes: number): string {
 }
 
 export function LogHistogram({ data, engine, onBarClick, loading, totalBytes, lineLimitReached, coverage }: LogHistogramProps) {
+  const { t } = useTranslation();
   const colors = ENGINE_COLORS[engine];
 
   const chartData = useMemo(() => {
@@ -111,7 +113,7 @@ export function LogHistogram({ data, engine, onBarClick, loading, totalBytes, li
                 fontSize: '11px',
                 color: 'var(--dg-text-primary)',
               }}
-              formatter={(value: number) => [`${value} 条`, 'logs']}
+              formatter={(value: number) => [t('monitor.loghistogram.sdc4634', { value: value }), 'logs']}
               labelFormatter={(label: string) => {
                 const item = chartData.find(d => d.label === label);
                 return item ? item.timestamp : label;