修复支付取消与成功统计

backend/internal/modules/paymentconfig/query.go

@@ -2,7 +2,9 @@ package paymentconfig
 
 import (
 	"context"
+	"database/sql/driver"
 	"errors"
+	"time"
 
 	"hfb_sys/backend/internal/model"
 
@@ -61,6 +63,9 @@ func (r *Repository) List(ctx context.Context, query ListQuery) ([]ConfigDTO, in
 		}
 		dtos = append(dtos, dto)
 	}
+	if err := r.applySuccessfulPaymentStats(ctx, dtos); err != nil {
+		return nil, 0, err
+	}
 
 	return dtos, total, nil
 }
@@ -78,6 +83,11 @@ func (r *Repository) FindByID(ctx context.Context, id uint64, includeSecret bool
 	if err != nil {
 		return nil, err
 	}
+	statDTOs := []ConfigDTO{dto}
+	if err := r.applySuccessfulPaymentStats(ctx, statDTOs); err != nil {
+		return nil, err
+	}
+	dto = statDTOs[0]
 	if includeSecret {
 		if err := appendAuditLog(r.db.WithContext(ctx), actorID, "payment_config.view_secret", item.ID, meta, map[string]any{
 			"name":        item.Name,
@@ -90,6 +100,103 @@ func (r *Repository) FindByID(ctx context.Context, id uint64, includeSecret bool
 	return &dto, nil
 }
 
+type paymentConfigSuccessStat struct {
+	ConfigID          uint64
+	TotalTransactions int64
+	TotalAmountCent   int64
+	LastPaidAt        nullableTime
+}
+
+// applySuccessfulPaymentStats 使用真实成功支付流水覆盖配置统计，避免仅打开二维码也被算作成交。
+func (r *Repository) applySuccessfulPaymentStats(ctx context.Context, dtos []ConfigDTO) error {
+	if len(dtos) == 0 {
+		return nil
+	}
+	ids := make([]uint64, 0, len(dtos))
+	indexByID := make(map[uint64]int, len(dtos))
+	for idx, dto := range dtos {
+		ids = append(ids, dto.ID)
+		indexByID[dto.ID] = idx
+		dtos[idx].TotalTransactions = 0
+		dtos[idx].TotalAmountCent = 0
+		dtos[idx].LastUsedAt = nil
+	}
+
+	var rows []paymentConfigSuccessStat
+	if err := r.db.WithContext(ctx).Model(&model.PaymentOrder{}).
+		Select("payment_config_id AS config_id, COUNT(*) AS total_transactions, COALESCE(SUM(amount_cent), 0) AS total_amount_cent, MAX(paid_at) AS last_paid_at").
+		Where("payment_config_id IN ? AND biz_type = ? AND status = ?", ids, "order_pay", "paid").
+		Group("payment_config_id").
+		Scan(&rows).Error; err != nil {
+		return err
+	}
+	for _, row := range rows {
+		idx, ok := indexByID[row.ConfigID]
+		if !ok {
+			continue
+		}
+		dtos[idx].TotalTransactions = row.TotalTransactions
+		dtos[idx].TotalAmountCent = row.TotalAmountCent
+		if row.LastPaidAt.Time != nil {
+			value := row.LastPaidAt.Time.Format(time.RFC3339)
+			dtos[idx].LastUsedAt = &value
+		}
+	}
+	return nil
+}
+
+type nullableTime struct {
+	Time *time.Time
+}
+
+// Value 实现 driver.Valuer，让 GORM 能把 nullableTime 当作普通扫描字段处理。
+func (nt nullableTime) Value() (driver.Value, error) {
+	if nt.Time == nil {
+		return nil, nil
+	}
+	return *nt.Time, nil
+}
+
+// Scan 兼容 MySQL 的 time.Time 和 SQLite 聚合函数返回的字符串时间。
+func (nt *nullableTime) Scan(value any) error {
+	switch v := value.(type) {
+	case nil:
+		nt.Time = nil
+	case time.Time:
+		nt.Time = &v
+	case []byte:
+		return nt.scanString(string(v))
+	case string:
+		return nt.scanString(v)
+	default:
+		nt.Time = nil
+	}
+	return nil
+}
+
+func (nt *nullableTime) scanString(value string) error {
+	if value == "" {
+		nt.Time = nil
+		return nil
+	}
+	for _, layout := range []string{
+		time.RFC3339Nano,
+		time.RFC3339,
+		"2006-01-02 15:04:05.999999999-07:00",
+		"2006-01-02 15:04:05-07:00",
+		"2006-01-02 15:04:05.999999999",
+		"2006-01-02 15:04:05",
+	} {
+		parsed, err := time.Parse(layout, value)
+		if err == nil {
+			nt.Time = &parsed
+			return nil
+		}
+	}
+	nt.Time = nil
+	return nil
+}
+
 // FindRuntimeByID 根据配置 ID 查询运行时配置，不写审计日志，供支付单回溯原配置使用。
 func (r *Repository) FindRuntimeByID(ctx context.Context, id uint64, includeSecret bool) (*ConfigDTO, error) {
 	var item model.PaymentMerchantConfig