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/en-US.ts

@@ -29,6 +29,7 @@ const enUS = {
     language: 'Language',
     helpDocs: 'Get Help',
     featureRequest: 'Feature Request',
+    starOnGitHub: 'Star on GitHub',
     create: 'Create',
     edit: 'Edit',
     delete: 'Delete',
@@ -612,6 +613,13 @@ const enUS = {
     sseTimeoutNonNegative: 'SSE timeout cannot be negative',
     updateSuccess: 'Updated successfully',
     updateFailed: 'Update failed: ',
+    selectFromSidebar: 'Select an MCP server from the sidebar',
+    dangerZone: 'Danger Zone',
+    dangerZoneDescription:
+      'Irreversible and destructive actions for this MCP server.',
+    deleteMCPAction: 'Delete this MCP server',
+    deleteMCPHint:
+      'Once deleted, this MCP server configuration cannot be recovered.',
   },
   pipelines: {
     title: 'Pipelines',

web/src/i18n/locales/ja-JP.ts

@@ -30,6 +30,7 @@
     language: '言語',
     helpDocs: 'ヘルプドキュメント',
     featureRequest: '機能リクエスト',
+    starOnGitHub: 'GitHubでStarする',
     create: '作成',
     edit: '編集',
     delete: '削除',
@@ -613,6 +614,11 @@
     sseTimeoutNonNegative: 'SSEタイムアウトは負の数にできません',
     updateSuccess: '更新に成功しました',
     updateFailed: '更新に失敗しました：',
+    selectFromSidebar: 'サイドバーからMCPサーバーを選択してください',
+    dangerZone: '危険ゾーン',
+    dangerZoneDescription: 'このMCPサーバーに対する不可逆的な操作です。',
+    deleteMCPAction: 'このMCPサーバーを削除',
+    deleteMCPHint: '削除すると、このMCPサーバーの設定は復元できません。',
   },
   pipelines: {
     title: 'パイプライン',

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',

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

@@ -28,6 +28,7 @@ const zhHant = {
     language: '語言',
     helpDocs: '輔助說明',
     featureRequest: '需求建議',
+    starOnGitHub: '在 GitHub 上 Star',
     create: '建立',
     edit: '編輯',
     delete: '刪除',
@@ -577,6 +578,11 @@ const zhHant = {
     sseTimeoutNonNegative: 'SSE逾時時間不能為負數',
     updateSuccess: '更新成功',
     updateFailed: '更新失敗：',
+    selectFromSidebar: '從側邊欄選擇一個 MCP 伺服器',
+    dangerZone: '危險區域',
+    dangerZoneDescription: '此 MCP 伺服器的不可逆操作。',
+    deleteMCPAction: '刪除此 MCP 伺服器',
+    deleteMCPHint: '刪除後，此 MCP 伺服器設定將無法恢復。',
   },
   pipelines: {
     title: '流程線',