fix

backend/gestion/db/db_command_items.go

@@ -328,29 +328,43 @@ func (d *Database) DeleteCommandItem(commandID, itemID int) error {
 	var cmdStatus string
 	d.GDB.Raw(`SELECT status FROM commandes WHERE id = ?`, commandID).Scan(&cmdStatus)
 
-	// Supprimer l'item
-	if err := d.GDB.Exec(`DELETE FROM command_items WHERE id = ?`, itemID).Error; err != nil {
+	noRestoreStatuses := []string{"cancelled", "approved", "livre"}
+	restoreStock := result.ProductID != 0 && !slices.Contains(noRestoreStatuses, cmdStatus)
+
+	tx := d.GDB.Begin()
+	if tx.Error != nil {
+		return fmt.Errorf("erreur démarrage transaction: %w", tx.Error)
+	}
+
+	if err := tx.Exec(`DELETE FROM command_items WHERE id = ?`, itemID).Error; err != nil {
+		tx.Rollback()
 		log.Printf("❌ Erreur DELETE command_items: %v", err)
 		return fmt.Errorf("erreur suppression item: %w", err)
 	}
 
-	// Recalculer le total de la commande
-	if err := d.GDB.Exec(
+	if err := tx.Exec(
 		`UPDATE commandes SET total_prix = GREATEST(0, total_prix - ?) WHERE id = ?`,
 		result.Prix*result.Quantite, commandID,
 	).Error; err != nil {
-		log.Printf("⚠️ [DeleteCommandItem] Erreur maj total commande: %v", err)
+		tx.Rollback()
+		log.Printf("❌ [DeleteCommandItem] Erreur maj total commande: %v", err)
+		return fmt.Errorf("erreur mise à jour total commande: %w", err)
 	}
 
-	// Restaurer le stock si la commande n'est pas déjà terminée
-	noRestoreStatuses := []string{"cancelled", "approved", "livre"}
-	if result.ProductID != 0 && !slices.Contains(noRestoreStatuses, cmdStatus) {
-		if err := d.GDB.Exec(`UPDATE products SET stock = stock + ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?`,
-			result.Quantite, result.ProductID).Error; err != nil {
-			log.Printf("⚠️ [DeleteCommandItem] Erreur restauration stock: %v", err)
-		} else {
-			log.Printf("✅ [DeleteCommandItem] Stock restauré: +%.3f pour produit %d", result.Quantite, result.ProductID)
+	if restoreStock {
+		if err := tx.Exec(
+			`UPDATE products SET stock = stock + ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?`,
+			result.Quantite, result.ProductID,
+		).Error; err != nil {
+			tx.Rollback()
+			log.Printf("❌ [DeleteCommandItem] Erreur restauration stock: %v", err)
+			return fmt.Errorf("erreur restauration stock: %w", err)
 		}
+		log.Printf("✅ [DeleteCommandItem] Stock restauré: +%.3f pour produit %d", result.Quantite, result.ProductID)
+	}
+
+	if err := tx.Commit().Error; err != nil {
+		return fmt.Errorf("erreur commit transaction: %w", err)
 	}
 
 	return nil

backend/gestion/db/db_commands.go

@@ -903,3 +903,13 @@ func (d *Database) ApproveDeliveryAtomicByStaff(commandID int, staffUsername str
 
 	return totalPoints, pointCategory, clientUsernameOut, nil
 }
+
+func (d *Database) SetCommandCancelReason(commandID int, reason string) error {
+	if len(reason) > 500 {
+		reason = reason[:500]
+	}
+	return d.GDB.Exec(
+		`UPDATE commandes SET cancel_reason = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?`,
+		reason, commandID,
+	).Error
+}