fix: SkillsUsage 页面样式修复与 API server skill usage 统计 (#698)

* Reapply "feat: 新增 Skills Usage 监控统计与图表 (#668)" (#670)

This reverts commit 91de3b12a1.

* fix: count API-server skill usage

* fix: align SkillsUsageView header with other pages and update sidebar icon

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

---------

Co-authored-by: Zhicheng Han <zhicheng.han@mathematik.uni-goettingen.de>
Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

packages/client/src/i18n/locales/zh.ts

@@ -83,6 +83,7 @@ export default {
     memory: '记忆',
     logs: '日志',
     usage: '用量',
+    skillsUsage: '技能用量',
     channels: '频道',
     gateways: '网关',
     terminal: '终端',
@@ -987,6 +988,28 @@ export default {
     cost: '费用',
     noData: '暂无用量数据',
   },
+  skillsUsage: {
+    title: '技能用量',
+    subtitle: '跟踪 Hermes 会话中的技能加载和编辑',
+    refresh: '刷新',
+    periodSelector: '技能用量周期',
+    periodLabel: '{days}天',
+    summary: '概览',
+    totalActions: '操作',
+    loads: '加载',
+    edits: '编辑',
+    distinctSkills: '技能数',
+    topSkills: '热门',
+    dailyTrend: '趋势',
+    periodSummary: '最近 {days} 天',
+    skill: '技能',
+    share: '占比',
+    lastUsed: '最近',
+    noData: '暂无技能用量数据',
+    loadFailed: '技能用量加载失败',
+    otherSkills: '其他技能',
+  },
+
   // 文件管理
   files: {
     title: '文件',