feat(product): add reusable Product Experience 2.0

Unify product details modules behind config-driven contracts so teams can
extend UX without changing runtime architecture or bootstrap flow.

Keep backward compatibility with existing product payloads by treating new
media/specification/variant/related structures as optional extensions.

Improve conversion and content discoverability with reusable actions,
typed media rendering, grouped specifications, dynamic variants, and
multi-collection related products.

src/app/shared/models/config/product-page-config.model.ts

@@ -7,10 +7,12 @@ export interface ProductRatingConfig extends ProductSectionConfig {}
 export interface ProductReviewsConfig extends ProductSectionConfig {
   pageSize?: number;
   showSummary?: boolean;
+  mode?: 'pages' | 'load-more';
 }
 
 export interface ProductQuestionsConfig extends ProductSectionConfig {
   pageSize?: number;
+  allowSubmission?: boolean;
 }
 
 export interface ProductTabsConfig extends ProductSectionConfig {
@@ -19,12 +21,22 @@ export interface ProductTabsConfig extends ProductSectionConfig {
 
 export interface ProductRelatedConfig extends ProductSectionConfig {}
 
+export interface ProductActionsConfig extends ProductSectionConfig {
+  addToCart?: boolean;
+  buyNow?: boolean;
+  wishlist?: boolean;
+  compare?: boolean;
+  share?: boolean;
+  notifyMe?: boolean;
+}
+
 export interface ProductPageConfig {
   rating?: ProductRatingConfig;
   reviews?: ProductReviewsConfig;
   questions?: ProductQuestionsConfig;
   tabs?: ProductTabsConfig;
   relatedProducts?: ProductRelatedConfig;
+  actions?: ProductActionsConfig;
 }
 
 export const DEFAULT_PRODUCT_PAGE_CONFIG: Required<ProductPageConfig> = {
@@ -34,11 +46,13 @@ export const DEFAULT_PRODUCT_PAGE_CONFIG: Required<ProductPageConfig> = {
   reviews: {
     enabled: true,
     pageSize: 5,
-    showSummary: true
+    showSummary: true,
+    mode: 'pages'
   },
   questions: {
     enabled: true,
-    pageSize: 5
+    pageSize: 5,
+    allowSubmission: true
   },
   tabs: {
     enabled: true,
@@ -46,5 +60,14 @@ export const DEFAULT_PRODUCT_PAGE_CONFIG: Required<ProductPageConfig> = {
   },
   relatedProducts: {
     enabled: true
+  },
+  actions: {
+    enabled: true,
+    addToCart: true,
+    buyNow: true,
+    wishlist: true,
+    compare: true,
+    share: true,
+    notifyMe: true
   }
 };