added translation

src/app/models/item.model.ts

@@ -1,3 +1,12 @@
+/**
+ * Per-language translation content for an item.
+ */
+export interface ItemTranslation {
+  name?: string;
+  simpleDescription?: string;
+  description?: ItemDescriptionField[];
+}
+
 export interface Item {
   id: string;
   name: string;
@@ -13,6 +22,8 @@ export interface Item {
   description: ItemDescriptionField[];
   subcategoryId: string;
   comments?: Comment[];
+  /** Optional translations keyed by language code: { ru: { name: '...', simpleDescription: '...', description: [...] } } */
+  translations?: { [lang: string]: ItemTranslation };
 }
 
 export interface ItemDescriptionField {