fix: allow redirect next_action so 3ds challenge url surfaces

api/handlers/cart.go

@@ -506,16 +506,6 @@ func (h *CartHandler) ConvertCart(w http.ResponseWriter, r *http.Request) {
 func (h *CartHandler) respondRequiresAction(w http.ResponseWriter, order *models.Order, pi *stripe.PaymentIntent) {
 	db := database.GetDB()
 
-	// PaymentIntents returned inside a *stripe.Error are partial — next_action
-	// is often nil. Re-fetch from Stripe to get the canonical PI with the 3DS
-	// challenge URL populated.
-	if pi.NextAction == nil || pi.NextAction.RedirectToURL == nil || pi.NextAction.RedirectToURL.URL == "" {
-		fresh, ferr := paymentintent.Get(pi.ID, nil)
-		if ferr == nil && fresh != nil {
-			pi = fresh
-		}
-	}
-
 	if pi.NextAction == nil || pi.NextAction.RedirectToURL == nil || pi.NextAction.RedirectToURL.URL == "" {
 		middleware.RecordCartConversion("sca_missing_next_action")
 		db.Model(order).Update("status", models.OrderStatusFailed)