feat(web): refactor MCP servers as sidebar entities and improve sidebar footer

- Refactor MCP servers to be managed as collapsible sidebar sub-items with
  ?id= detail routing and inline form (matching bots/pipelines pattern)
- Add MCPDetailContent with create/edit modes, enable toggle, and danger zone
- Extract MCPForm as standalone inline form from MCPFormDialog
- Move API Integration to standalone sidebar footer button
- Add GitHub star CTA with live star count badge in user dropdown menu
- Add MCP server status dot indicators in sidebar (green/gray for enabled/disabled)
- Add i18n keys for MCP detail page and GitHub star CTA in all 4 locales

web/src/i18n/locales/zh-Hans.ts

@@ -28,6 +28,7 @@ const zhHans = {
     language: '语言',
     helpDocs: '帮助文档',
     featureRequest: '需求建议',
+    starOnGitHub: '在 GitHub 上 Star',
     create: '创建',
     edit: '编辑',
     delete: '删除',
@@ -584,6 +585,11 @@ const zhHans = {
     sseTimeoutNonNegative: 'SSE超时时间不能为负数',
     updateSuccess: '更新成功',
     updateFailed: '更新失败：',
+    selectFromSidebar: '从侧边栏选择一个 MCP 服务器',
+    dangerZone: '危险区域',
+    dangerZoneDescription: '此 MCP 服务器的不可逆操作。',
+    deleteMCPAction: '删除此 MCP 服务器',
+    deleteMCPHint: '删除后，此 MCP 服务器配置将无法恢复。',
   },
   pipelines: {
     title: '流水线',