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/exportGroupResultLogic.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/csv"
+	"encoding/json"
 	"fmt"
 
 	"github.com/perfect-panel/server/internal/model/group"
@@ -52,10 +53,9 @@ func (l *ExportGroupResultLogic) ExportGroupResult(req *types.ExportGroupResultR
 				Email string `json:"email"`
 			}
 			var users []UserInfo
-			if err := l.svcCtx.DB.Raw("SELECT * FROM JSON_ARRAY(?)", detail.UserData).Scan(&users).Error; err != nil {
-				// 如果解析失败，尝试用标准 JSON 解析
+			if err := json.Unmarshal([]byte(detail.UserData), &users); err != nil {
 				logger.Errorf("failed to parse user data: %v", err)
-				continue
+				return nil, "", fmt.Errorf("parse group history user_data failed: %w", err)
 			}
 
 			// 查询节点组名称
@@ -123,7 +123,10 @@ func (l *ExportGroupResultLogic) ExportGroupResult(req *types.ExportGroupResultR
 	result = append(result, csvData...)
 
 	// 生成文件名
-	filename := fmt.Sprintf("group_result_%d.csv", req.HistoryId)
+	filename := "group_result_current.csv"
+	if req.HistoryId != nil {
+		filename = fmt.Sprintf("group_result_%d.csv", *req.HistoryId)
+	}
 
 	return result, filename, nil
 }