Features:

- Node group CRUD operations with traffic-based filtering
  - Three grouping modes: average distribution, subscription-based, and traffic-based
  - Automatic and manual group recalculation with history tracking
  - Group assignment preview before applying changes
  - User subscription group locking to prevent automatic reassignment
  - Subscribe-to-group mapping configuration
  - Group calculation history and detailed reports
  - System configuration for group management (enabled/mode/auto_create)

  Database:
  - Add node_group table for group definitions
  - Add group_history and group_history_detail tables for tracking
  - Add node_group_ids (JSON) to nodes and subscribe tables
  - Add node_group_id and group_locked fields to user_subscribe table
  - Add migration files for schema changes

internal/logic/admin/group/getSubscribeGroupMappingLogic.go

@@ -0,0 +1,71 @@
+package group
+
+import (
+	"context"
+
+	"github.com/perfect-panel/server/internal/model/group"
+	"github.com/perfect-panel/server/internal/model/subscribe"
+	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/logger"
+)
+
+type GetSubscribeGroupMappingLogic struct {
+	logger.Logger
+	ctx    context.Context
+	svcCtx *svc.ServiceContext
+}
+
+// Get subscribe group mapping
+func NewGetSubscribeGroupMappingLogic(ctx context.Context, svcCtx *svc.ServiceContext) *GetSubscribeGroupMappingLogic {
+	return &GetSubscribeGroupMappingLogic{
+		Logger: logger.WithContext(ctx),
+		ctx:    ctx,
+		svcCtx: svcCtx,
+	}
+}
+
+func (l *GetSubscribeGroupMappingLogic) GetSubscribeGroupMapping(req *types.GetSubscribeGroupMappingRequest) (resp *types.GetSubscribeGroupMappingResponse, err error) {
+	// 1. 查询所有订阅套餐
+	var subscribes []subscribe.Subscribe
+	if err := l.svcCtx.DB.Table("subscribe").Find(&subscribes).Error; err != nil {
+		l.Errorw("[GetSubscribeGroupMapping] failed to query subscribes", logger.Field("error", err.Error()))
+		return nil, err
+	}
+
+	// 2. 查询所有节点组
+	var nodeGroups []group.NodeGroup
+	if err := l.svcCtx.DB.Table("node_group").Find(&nodeGroups).Error; err != nil {
+		l.Errorw("[GetSubscribeGroupMapping] failed to query node groups", logger.Field("error", err.Error()))
+		return nil, err
+	}
+
+	// 创建 node_group_id -> node_group_name 的映射
+	nodeGroupMap := make(map[int64]string)
+	for _, ng := range nodeGroups {
+		nodeGroupMap[ng.Id] = ng.Name
+	}
+
+	// 3. 构建映射结果：套餐 -> 默认节点组（一对一）
+	var mappingList []types.SubscribeGroupMappingItem
+
+	for _, sub := range subscribes {
+		// 获取套餐的默认节点组（node_group_ids 数组的第一个）
+		nodeGroupName := ""
+		if len(sub.NodeGroupIds) > 0 {
+			defaultNodeGroupId := sub.NodeGroupIds[0]
+			nodeGroupName = nodeGroupMap[defaultNodeGroupId]
+		}
+
+		mappingList = append(mappingList, types.SubscribeGroupMappingItem{
+			SubscribeName: sub.Name,
+			NodeGroupName: nodeGroupName,
+		})
+	}
+
+	resp = &types.GetSubscribeGroupMappingResponse{
+		List: mappingList,
+	}
+
+	return resp, nil
+}