fix(front-end): seo improvemnts

frontend/src/app/features/shop/product-detail.component.ts

@@ -236,13 +236,14 @@ export class ProductDetailComponent {
               this.selectedVariantId.set(null);
               this.setSelectedImageAssetId(null);
               this.modelFile.set(null);
+              const isNotFound = error?.status === 404;
               this.error.set(
-                error?.status === 404 ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
+                isNotFound ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
               );
-              if (error?.status === 404) {
-                this.setResponseStatus(404);
-              }
+              this.setResponseStatus(isNotFound ? 404 : 503);
+              if (this.shouldApplyFallbackSeo(error)) {
                 this.applyFallbackSeo();
+              }
               return of(null);
             }),
             finalize(() => this.loading.set(false)),
@@ -598,6 +599,14 @@ export class ProductDetailComponent {
     });
   }
 
+  private shouldApplyFallbackSeo(error: { status?: number } | null): boolean {
+    if (error?.status === 404) {
+      return true;
+    }
+
+    return !this.isBrowser;
+  }
+
   private materialLabelForVariant(
     variant: ShopProductVariantOption | null,
   ): string {

frontend/src/app/features/shop/shop-page.component.ts

@@ -1,5 +1,6 @@
-import { CommonModule } from '@angular/common';
+import { CommonModule, isPlatformBrowser } from '@angular/common';
 import {
+  PLATFORM_ID,
   RESPONSE_INIT,
   afterNextRender,
   Component,
@@ -61,6 +62,7 @@ export class ShopPageComponent {
   private readonly router = inject(Router);
   private readonly translate = inject(TranslateService);
   private readonly seoService = inject(SeoService);
+  private readonly isBrowser = isPlatformBrowser(inject(PLATFORM_ID));
   private readonly responseInit = inject(RESPONSE_INIT, { optional: true });
   readonly languageService = inject(LanguageService);
   private readonly shopRouteService = inject(ShopRouteService);
@@ -113,17 +115,18 @@ export class ShopPageComponent {
             catalog: this.shopService.getProductCatalog(categorySlug ?? null),
           }).pipe(
             catchError((error) => {
+              const isNotFound = error?.status === 404;
               this.categories.set([]);
               this.categoryNodes.set([]);
               this.selectedCategory.set(null);
               this.products.set([]);
               this.error.set(
-                error?.status === 404 ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
+                isNotFound ? 'SHOP.NOT_FOUND' : 'SHOP.LOAD_ERROR',
               );
-              if (error?.status === 404) {
-                this.setResponseStatus(404);
-              }
+              this.setResponseStatus(isNotFound ? 404 : 503);
+              if (this.shouldApplyErrorSeo(error)) {
                 this.applyErrorSeo();
+              }
               return of(null);
             }),
             finalize(() => this.loading.set(false)),
@@ -376,6 +379,14 @@ export class ShopPageComponent {
     });
   }
 
+  private shouldApplyErrorSeo(error: { status?: number } | null): boolean {
+    if (error?.status === 404) {
+      return true;
+    }
+
+    return !this.isBrowser;
+  }
+
   private setResponseStatus(status: number): void {
     if (this.responseInit) {
       this.responseInit.status = status;