fix(storefront): replace hardcoded strings with i18n, neutral empty-state wording

- Route aria-label/alt/title strings (rating, discount, carousel arrows,
  hero slides, dialog close, toast dismiss, QR code, bank payment iframe,
  guest checkout fallback) through the translate pipe/service instead of
  literal English.
- Drop the "Oops!"/"Упс!" apology framing from category/subcategory empty
  states (en/ru/hy) - zero results is not an error.

src/app/i18n/translations.ts

@@ -1085,6 +1085,17 @@ export interface Translations {
     remove: string;
     errorTitle: string;
     errorDescription: string;
+    ratingLabel: string;
+    discountLabel: string;
+    slideLabel: string;
+    slidesLabel: string;
+    previousProducts: string;
+    nextProducts: string;
+    closeDialog: string;
+    dismiss: string;
+    qrCode: string;
+    bankCardPayment: string;
+    guest: string;
   };
   location: {
     allRegions: string;