修复二维码库存与过期时间编辑

backend/internal/modules/chat/qrcode.go

@@ -36,9 +36,11 @@ type BatchCreateQrCodeRequest struct {
 
 // UpdateQrCodeRequest 更新二维码请求
 type UpdateQrCodeRequest struct {
-	Note      *string    `json:"note"`
-	Status    *string    `json:"status"`
-	ExpiresAt *time.Time `json:"expires_at"`
+	ImageURL       *string    `json:"image_url"`
+	Note           *string    `json:"note"`
+	Status         *string    `json:"status"`
+	ExpiresAt      *time.Time `json:"expires_at"`
+	ClearExpiresAt bool       `json:"clear_expires_at"`
 }
 
 // QrCodeListRequest 列表查询请求
@@ -140,32 +142,29 @@ func (r *Repository) ListQrCodes(ctx context.Context, req QrCodeListRequest) ([]
 // GetQrCodeStats 获取二维码统计信息
 func (r *Repository) GetQrCodeStats(ctx context.Context) (*QrCodeStats, error) {
 	stats := &QrCodeStats{}
+	now := time.Now()
 
-	// 统计各状态数量
-	type CountResult struct {
-		Status string
-		Count  int64
-	}
-	var results []CountResult
-
-	if err := r.db.WithContext(ctx).
-		Model(&model.ChatQrCode{}).
-		Select("status, COUNT(*) as count").
-		Group("status").
-		Find(&results).Error; err != nil {
+	if err := r.db.WithContext(ctx).Model(&model.ChatQrCode{}).Count(&stats.TotalCount).Error; err != nil {
 		return nil, err
 	}
-
-	for _, r := range results {
-		stats.TotalCount += r.Count
-		switch r.Status {
-		case QrCodeStatusUnused:
-			stats.UnusedCount = r.Count
-		case QrCodeStatusUsed:
-			stats.UsedCount = r.Count
-		case QrCodeStatusDisabled:
-			stats.DisabledCount = r.Count
-		}
+	if err := r.db.WithContext(ctx).
+		Model(&model.ChatQrCode{}).
+		Where("status = ?", QrCodeStatusUsed).
+		Count(&stats.UsedCount).Error; err != nil {
+		return nil, err
+	}
+	if err := r.db.WithContext(ctx).
+		Model(&model.ChatQrCode{}).
+		Where("status = ?", QrCodeStatusDisabled).
+		Count(&stats.DisabledCount).Error; err != nil {
+		return nil, err
+	}
+	if err := r.db.WithContext(ctx).
+		Model(&model.ChatQrCode{}).
+		Where("status = ?", QrCodeStatusUnused).
+		Where("expires_at IS NULL OR expires_at > ?", now).
+		Count(&stats.UnusedCount).Error; err != nil {
+		return nil, err
 	}
 
 	return stats, nil
@@ -175,6 +174,9 @@ func (r *Repository) GetQrCodeStats(ctx context.Context) (*QrCodeStats, error) {
 func (r *Repository) UpdateQrCode(ctx context.Context, id uint64, req UpdateQrCodeRequest) error {
 	updates := make(map[string]interface{})
 
+	if req.ImageURL != nil {
+		updates["image_url"] = *req.ImageURL
+	}
 	if req.Note != nil {
 		updates["note"] = *req.Note
 	}
@@ -187,6 +189,8 @@ func (r *Repository) UpdateQrCode(ctx context.Context, id uint64, req UpdateQrCo
 	}
 	if req.ExpiresAt != nil {
 		updates["expires_at"] = req.ExpiresAt
+	} else if req.ClearExpiresAt {
+		updates["expires_at"] = nil
 	}
 
 	if len(updates) == 0 {