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/system.json

@@ -19,6 +19,7 @@
     "description": "配置货币单位、符号和汇率 API 设置",
     "title": "货币配置"
   },
+  "groupSettings": "",
   "invite": {
     "description": "配置用户邀请和推荐奖励设置",
     "forcedInvite": "强制邀请注册",