cleanup: remove tenant variant logic and enforce config-driven UI

src/app/pages/item-detail/item-detail.component.ts

@@ -12,7 +12,6 @@ import { getStockStatus, getBadgeClass, getTranslatedField } from '../../utils/i
 import { LangRoutePipe } from '../../pipes/lang-route.pipe';
 import { TranslatePipe } from '../../i18n/translate.pipe';
 import { TranslateService } from '../../i18n/translate.service';
-import { UiRuntimeFacade } from '../../facades/runtime/ui-runtime.facade';
 import { ProductFacade } from '../../facades/platform/product.facade';
 import { ProductCardComponent } from '../../components/product-card/product-card.component';
 
@@ -29,11 +28,6 @@ export class ItemDetailComponent implements OnInit, OnDestroy {
   relatedProducts = signal<Item[]>([]);
   loading = signal(true);
   error = signal<string | null>(null);
-  private readonly uiRuntime = inject(UiRuntimeFacade);
-
-  get isMarketplaceNovo(): boolean {
-    return this.uiRuntime.isMarketplaceVariant('novo');
-  }
 
   // Variant selection
   selectedColour = signal<string | null>(null);