完善服务端材质渲染（未测试），删除profile表中不必要的isActive字段及相关接口

internal/repository/profile_repository.go

@@ -109,20 +109,6 @@ func (r *profileRepository) CountByUserID(ctx context.Context, userID int64) (in
 	return count, err
 }
 
-func (r *profileRepository) SetActive(ctx context.Context, uuid string, userID int64) error {
-	return r.db.WithContext(ctx).Transaction(func(tx *gorm.DB) error {
-		if err := tx.Model(&model.Profile{}).
-			Where("user_id = ?", userID).
-			Update("is_active", false).Error; err != nil {
-			return err
-		}
-
-		return tx.Model(&model.Profile{}).
-			Where("uuid = ? AND user_id = ?", uuid, userID).
-			Update("is_active", true).Error
-	})
-}
-
 func (r *profileRepository) UpdateLastUsedAt(ctx context.Context, uuid string) error {
 	return r.db.WithContext(ctx).Model(&model.Profile{}).
 		Where("uuid = ?", uuid).