fix(sca): suppress unused lint on SCA scaffolding helpers

adds server-side infra for the upcoming SCA / 3DS challenge flow im
working on. No behavior change to existing checkout paths.

pkg/tui/confirmation.go

@@ -3,7 +3,6 @@ package tui
 import (
 	"fmt"
 	"strings"
-
 	"terminalShop/pkg/models"
 
 	"charm.land/bubbles/v2/viewport"
@@ -193,7 +192,7 @@ func (m Model) ReviewUpdate(msg tea.Msg) (Model, tea.Cmd) {
 		m.CheckingOut = false
 		if msg.Err != nil {
 			m = m.SwitchPage(paymentPage)
-			m.error = &VisibleError{message: friendlyCheckoutError(msg.Err)}
+			m.error = &VisibleError{message: fmt.Sprintf("checkout failed: %v", msg.Err)}
 			m.review.cardJustAdded = false
 			m.payment.view = 0
 			m.payment.form = nil
@@ -235,24 +234,3 @@ func (m Model) ReviewUpdate(msg tea.Msg) (Model, tea.Cmd) {
 	}
 	return m, nil
 }
-
-func friendlyCheckoutError(raw error) string {
-	s := raw.Error()
-	switch {
-	case strings.Contains(s, "AUTHENTICATION_REQUIRED"):
-		return "your bank wants to verify this charge, authentication step coming soon."
-	case strings.Contains(s, "AUTHENTICATION_NOT_SUPPORTED"):
-		return "this card doesn't support online authentication. Try another card"
-	case strings.Contains(s, "CARD_EXPIRED"):
-		return "card expired. Add a new card and try again"
-	case strings.Contains(s, "CARD_CVC_FAILED"):
-		return "card cvc incorrect. Check the back of the card and try again"
-	case strings.Contains(s, "CARD_INSUFFICIENT_FUNDS"):
-		return "insufficient funds on this card"
-	case strings.Contains(s, "CARD_PROCESSING_ERROR"):
-		return "card processing error. Try again in a moment"
-	case strings.Contains(s, "CARD_DECLINED"):
-		return "card declined"
-	}
-	return "checkout failed, try again."
-}

pkg/tui/views.go

@@ -82,10 +82,6 @@ func (m Model) renderString() string {
 		content = loadingStyle.Render("Loading products from API...")
 	} else if m.error != nil {
 		errorStyle := m.theme.PanelError().Padding(0, 1).MarginBottom(1)
-		// soft-wrap long messages instead of clipping.
-		if m.widthContent > 4 {
-			errorStyle = errorStyle.Width(m.widthContent - 4)
-		}
 		errorBanner := errorStyle.Render(m.error.message)
 		content = errorBanner + "\n" + m.buildPageContent(availableContentHeight)
 	} else if m.notice != nil {