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/router/index.ts

@@ -50,6 +50,11 @@ const router = createRouter({
       name: 'hermes.usage',
       component: () => import('@/views/hermes/UsageView.vue'),
     },
+    {
+      path: '/hermes/skills-usage',
+      name: 'hermes.skillsUsage',
+      component: () => import('@/views/hermes/SkillsUsageView.vue'),
+    },
     {
       path: '/hermes/skills',
       name: 'hermes.skills',