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/product.json

@@ -1,4 +1,5 @@
 {
+  "all": "全部",
   "cancel": "取消",
   "confirm": "确认",
   "confirmDelete": "确定要删除吗？",
@@ -7,13 +8,16 @@
   "create": "创建",
   "createSubscribe": "创建订阅",
   "createSuccess": "创建成功",
+  "currentUserGroup": "当前用户分组",
+  "defaultNodeGroup": "默认节点组",
   "delete": "删除",
+  "nodeGroups": "节点组",
+  "nodes": "个节点",
   "deleteSuccess": "删除成功",
   "deleteWarning": "删除后数据无法恢复，请谨慎操作。",
   "deviceLimit": "IP限制",
   "edit": "编辑",
   "editSubscribe": "编辑订阅",
-  "sortSuccess": "排序成功",
   "form": {
     "annualReset": "年度重置",
     "basic": "基本",
@@ -30,7 +34,6 @@
     "discountPercent": "折扣百分比",
     "Hour": "小时",
     "inventory": "订阅库存",
-    "unlimitedInventory": "无限制（输入 -1）",
     "language": "语言",
     "languageDescription": "留空为默认无语言限制",
     "languagePlaceholder": "订阅的语言标识符，例如 en-US、zh-CN",
@@ -40,7 +43,19 @@
     "name": "名称",
     "node": "节点",
     "nodeGroup": "节点组",
-    "nodes": "节点",
+    "nodeGroups": "节点组",
+    "nodeGroupsDescription": "将此商品分配到多个节点分组。用户将可以从这些分组获取节点。",
+    "nodeGroupsFirstSelectionDescription": "为此商品选择节点组。第一个选中的组将被设置为默认节点组。",
+    "defaultNodeGroup": "默认节点组",
+    "defaultNodeGroupDescription": "为此商品选择默认节点组。将自动包含在备用节点组中。",
+    "selectDefaultNodeGroup": "选择默认节点组...",
+    "noDefaultNodeGroup": "无默认节点组",
+    "backupNodeGroups": "备用节点组",
+    "backupNodeGroupsDescription": "选择其他备用节点组。默认节点组会自动包含。",
+    "nodes": "关联节点",
+    "nodesDescription": "选择此订阅的节点",
+    "nodesInGroup": "分组中的节点：",
+    "nodesWithoutGroupsDescription": "未分配到分组的节点将在此处显示（属于分组的节点在上方的节点组部分管理）",
     "noLimit": "无限制",
     "NoLimit": "无限制",
     "noReset": "不重置",
@@ -61,16 +76,42 @@
     "traffic": "流量",
     "unitPrice": "单价",
     "unitTime": "时间单位",
+    "unlimitedInventory": "无限制（输入 -1）",
     "Year": "年"
   },
+  "groupMapping": "分组映射",
+  "groupMappingTitle": "分组映射",
+  "groupMappingUpdateFailed": "更新分组映射失败",
+  "groupMappingUpdateSuccess": "分组映射更新成功",
+  "migrateUsers": "迁移用户",
+  "migrateUsersTitle": "迁移用户",
+  "migrateUsersDescription": "将当前用户组的所有用户迁移到另一个用户组",
+  "migrateUsersWarning": "这将把 {count} 个用户从 \"{group}\" 迁移到目标用户组。此操作无法撤销。",
+  "migrateUsersSuccess": "成功将 {count} 个用户迁移到目标用户组",
+  "migrateUsersFailed": "迁移用户失败",
+  "targetUserGroup": "目标用户组",
+  "selectTargetGroup": "选择目标用户组...",
+  "selectTargetGroupFirst": "请先选择目标用户组",
+  "cannotMigrateToSameGroup": "无法迁移到相同的用户组",
+  "noSourceGroup": "没有可用的源用户组",
+  "selectedGroup": "已选择的分组",
+  "userCount": "用户数量",
+  "migrating": "迁移中...",
   "inventory": "订阅库存",
   "language": "语言",
+  "loading": "加载中...",
   "name": "名称",
+  "noMapping": "未设置映射",
+  "noNodes": "该分组下没有节点",
   "quota": "购买限制/次",
   "replacement": "重置价格/次",
+  "save": "保存",
+  "selectGroupPlaceholder": "选择分组...",
+  "selectUserGroup": "选择用户分组",
   "sell": "销售",
   "show": "显示",
   "sold": "订阅数量",
+  "sortSuccess": "排序成功",
   "traffic": "流量",
   "unitPrice": "单价",
   "updateSuccess": "更新成功"