clean up stage 1

src/app/components/header/header.component.html

@@ -1,5 +1,5 @@
 <!-- novo VERSION - Modern Minimalist Header -->
-@if (isnovo) {
+@if (isMarketplaceNovo) {
   <header class="novo-header">
     <div class="novo-header-container">
       <div class="novo-left">

src/app/components/header/header.component.ts

@@ -32,15 +32,15 @@ export class HeaderComponent {
   }
 
   get brandName(): string {
-    return this.uiRuntime.brandFullName();
+    return this.uiRuntime.marketplaceDisplayName();
   }
 
   get logo(): string {
     return this.uiRuntime.logoUrl();
   }
 
-  get isnovo(): boolean {
-    return this.uiRuntime.isNovo();
+  get isMarketplaceNovo(): boolean {
+    return this.uiRuntime.isMarketplaceVariant('novo');
   }
 
   get homeUrl(): string {