修复(#8): 分组管理核心缺陷与测试覆盖 (#11)

Co-authored-by: multica-agent <github@multica.ai>

internal/logic/admin/group/deleteNodeGroupLogic.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/perfect-panel/server/internal/model/group"
 	"github.com/perfect-panel/server/internal/model/node"
+	"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"
@@ -48,6 +49,33 @@ func (l *DeleteNodeGroupLogic) DeleteNodeGroup(req *types.DeleteNodeGroupRequest
 		return fmt.Errorf("cannot delete group with %d associated nodes, please migrate nodes first", nodeCount)
 	}
 
+	var defaultSubscribeCount int64
+	if err := l.svcCtx.DB.Model(&subscribe.Subscribe{}).Where("node_group_id = ?", nodeGroup.Id).Count(&defaultSubscribeCount).Error; err != nil {
+		logger.Errorf("failed to count subscribes with default group: %v", err)
+		return err
+	}
+	if defaultSubscribeCount > 0 {
+		return fmt.Errorf("cannot delete group referenced by %d subscribes' default node group", defaultSubscribeCount)
+	}
+
+	var subscribeGroupCount int64
+	if err := l.svcCtx.DB.Model(&subscribe.Subscribe{}).Where("JSON_CONTAINS(node_group_ids, ?)", fmt.Sprintf("[%d]", nodeGroup.Id)).Count(&subscribeGroupCount).Error; err != nil {
+		logger.Errorf("failed to count subscribes in group: %v", err)
+		return err
+	}
+	if subscribeGroupCount > 0 {
+		return fmt.Errorf("cannot delete group referenced by %d subscribes' node group list", subscribeGroupCount)
+	}
+
+	var userSubscribeCount int64
+	if err := l.svcCtx.DB.Table("user_subscribe").Where("node_group_id = ?", nodeGroup.Id).Count(&userSubscribeCount).Error; err != nil {
+		logger.Errorf("failed to count user subscribes in group: %v", err)
+		return err
+	}
+	if userSubscribeCount > 0 {
+		return fmt.Errorf("cannot delete group referenced by %d user subscribes", userSubscribeCount)
+	}
+
 	// 使用 GORM Transaction 删除节点组
 	return l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
 		// 删除节点组