优化结构

internal/data/task/migrations.go

@@ -25,12 +25,6 @@ func SeedDefaults(ctx context.Context, db *gorm.DB, defaults []platformmodule.Ti
 	if db == nil {
 		return nil
 	}
-	if len(defaults) == 0 {
-		defaults = []platformmodule.TimedTask{
-			{Name: "ClearDB", Description: "定时清理数据库过期日志", Spec: "@daily", MethodName: "ClearDB", Enabled: true},
-			{Name: "CleanStaleUploads", Description: "定时清理过期大文件上传会话", Spec: "@hourly", MethodName: "CleanStaleUploads", Enabled: true},
-		}
-	}
 	return db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
 		for _, item := range defaults {
 			if strings.TrimSpace(item.Name) == "" {