feat(业务用户组): AUG26-003 业务用户组与店铺负责人分组导入

- 迁移 000221：新增 tb_business_user_group、tb_business_user_group_member、tb_shop_business_owner_import_task，成员一账号一行由部分唯一索引保证，店铺所属组按当前负责人实时推导，不回填历史分组。
- 用户组 CRUD、成员改组/清空归属、店铺批量交接（原子失败不部分写入）。
- 店铺负责人 CSV 导入任务：逐行独立事务、逐行明细、任务级与行级失败分离。
- 读侧推导与筛选：未分组、业务线、停用组可筛出并带停用标记。
- 补齐操作审计动作与资源、openapi 清单、发布门禁巡检表清单。
- 归档 add-shop-salesperson-groups 变更并同步 openspec/specs/business-user-group，补齐 AUG26-003 验证证据链。

internal/query/shop/business_owner.go

@@ -119,6 +119,27 @@ func applyShopFilters(db *gorm.DB, request dto.ShopListRequest) *gorm.DB {
 	if request.Status != nil {
 		db = db.Where("status = ?", *request.Status)
 	}
+	// 店铺所属组由当前负责人实时推导，因此筛选一律用存在性子查询；
+	// 主查询保持先 Count 再 Find 的同一 SQL，改用 JOIN 会放大计数行并引入列歧义。
+	if request.BusinessUserGroupID != nil {
+		db = db.Where(
+			"EXISTS (SELECT 1 FROM tb_business_user_group_member m WHERE m.account_id = tb_shop.business_owner_account_id AND m.deleted_at IS NULL AND m.business_user_group_id = ?)",
+			*request.BusinessUserGroupID)
+	}
+	if request.BusinessLine != nil {
+		db = db.Where(
+			"EXISTS (SELECT 1 FROM tb_business_user_group_member m WHERE m.account_id = tb_shop.business_owner_account_id AND m.deleted_at IS NULL AND EXISTS (SELECT 1 FROM tb_business_user_group g WHERE g.id = m.business_user_group_id AND g.deleted_at IS NULL AND g.business_line = ?))",
+			*request.BusinessLine)
+	}
+	if request.Ungrouped != nil {
+		// 未分组只包含无负责人与负责人无未删除成员关系两种情形；停用组的负责人仍属于已分组。
+		const ungroupedCondition = "(tb_shop.business_owner_account_id IS NULL OR NOT EXISTS (SELECT 1 FROM tb_business_user_group_member m WHERE m.account_id = tb_shop.business_owner_account_id AND m.deleted_at IS NULL))"
+		if *request.Ungrouped {
+			db = db.Where(ungroupedCondition)
+		} else {
+			db = db.Where("NOT " + ungroupedCondition)
+		}
+	}
 	return db
 }
 
@@ -132,6 +153,11 @@ func (q *BusinessOwnerQuery) project(ctx context.Context, shops []*model.Shop) (
 	if err != nil {
 		return nil, err
 	}
+	// 在既有 loadBusinessOwners 之上追加两次批量查询即完成组推导，避免 N+1。
+	groups, err := q.loadBusinessUserGroups(ctx, ownerIDs)
+	if err != nil {
+		return nil, err
+	}
 	responses := make([]*dto.ShopResponse, 0, len(shops))
 	for _, shop := range shops {
 		response := &dto.ShopResponse{
@@ -151,7 +177,16 @@ func (q *BusinessOwnerQuery) project(ctx context.Context, shops []*model.Shop) (
 			if owner, exists := owners[*shop.BusinessOwnerAccountID]; exists {
 				response.BusinessOwnerUsername = owner.Username
 				response.BusinessOwnerPhoneSummary = maskPhone(owner.Phone)
-				response.BusinessOwnerAvailable = owner.UserType == constants.UserTypePlatform && owner.Status == constants.StatusEnabled && !owner.DeletedAt.Valid
+				response.BusinessOwnerAvailable = owner.UserType == constants.UserTypePlatform &&
+					owner.Status == constants.StatusEnabled && !owner.DeletedAt.Valid
+			}
+			if group, exists := groups[*shop.BusinessOwnerAccountID]; exists {
+				groupID := group.ID
+				response.BusinessUserGroupID = &groupID
+				response.BusinessUserGroupCode = group.Code
+				response.BusinessUserGroupName = group.Name
+				response.BusinessUserGroupEnabled = group.Status == constants.StatusEnabled
+				response.BusinessUserGroupBusinessLine = group.BusinessLine
 			}
 		}
 		responses = append(responses, response)
@@ -204,6 +239,43 @@ func (q *BusinessOwnerQuery) loadBusinessOwners(ctx context.Context, ids []uint)
 	return result, nil
 }
 
+// loadBusinessUserGroups 按负责人账号批量推导当前所属业务用户组。
+// 一账号至多一条未删除成员关系，因此先在成员上按 account_id 定位、再按组 ID 回表，
+// 停用组与负责人为已软删账号的成员关系都照常返回，保证展示与筛选口径一致。
+func (q *BusinessOwnerQuery) loadBusinessUserGroups(ctx context.Context, accountIDs []uint) (map[uint]model.BusinessUserGroup, error) {
+	result := make(map[uint]model.BusinessUserGroup, len(accountIDs))
+	if len(accountIDs) == 0 {
+		return result, nil
+	}
+	var members []model.BusinessUserGroupMember
+	if err := q.db.WithContext(ctx).Model(&model.BusinessUserGroupMember{}).
+		Where("account_id IN ?", accountIDs).Find(&members).Error; err != nil {
+		return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询负责人业务用户组归属失败")
+	}
+	if len(members) == 0 {
+		return result, nil
+	}
+	groupIDs := make(map[uint]struct{}, len(members))
+	for _, member := range members {
+		groupIDs[member.BusinessUserGroupID] = struct{}{}
+	}
+	var groups []model.BusinessUserGroup
+	if err := q.db.WithContext(ctx).Model(&model.BusinessUserGroup{}).
+		Where("id IN ?", mapKeys(groupIDs)).Find(&groups).Error; err != nil {
+		return nil, errors.Wrap(errors.CodeDatabaseError, err, "查询业务用户组失败")
+	}
+	groupByID := make(map[uint]model.BusinessUserGroup, len(groups))
+	for _, group := range groups {
+		groupByID[group.ID] = group
+	}
+	for _, member := range members {
+		if group, exists := groupByID[member.BusinessUserGroupID]; exists {
+			result[member.AccountID] = group
+		}
+	}
+	return result, nil
+}
+
 func mapKeys(values map[uint]struct{}) []uint {
 	keys := make([]uint, 0, len(values))
 	for key := range values {