feat(group): add node group management UI

Add node group management interface with automatic user assignment and traffic-based grouping.

Features:
- Node group CRUD with traffic range configuration
- Three grouping modes: average, subscription-based, and traffic-based
- Group recalculation with preview and history tracking
- Subscribe-to-group mapping management
- User subscription group locking
- Group calculation history with detailed reports
- Multi-language support (en-US, zh-CN)
- Enhanced node and subscription forms with group selection

apps/admin/public/assets/locales/zh-CN/tool.json

@@ -12,6 +12,7 @@
   "systemReboot": "系统重启",
   "systemServices": "系统服务",
   "update": "更新",
+  "updateDescription": "",
   "updateFailed": "更新失败",
   "updateServerDescription": "确定要将服务器版本从 {{current}} 更新到 {{latest}} 吗？",
   "updateSuccess": "更新成功",