Align user-product links and chart copy with id+slug URLs.

Support pathSlug in types/website helpers and note that product views include customer listings.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/customer/src/types/userProduct.ts

@@ -7,6 +7,9 @@ export interface UserProductListItem {
   title: string
   titleFa?: string | null
   titleEn?: string | null
+  /** SEO path segment for `/user-products/{id}/{pathSlug}` (from titleFa/titleEn). */
+  pathSlug?: string | null
+  slug?: string | null
   description?: string | null
   price: number | null
   priceCurrency?: UserProductPriceCurrency | string | null