the first commit

src/app/models/category.model.ts

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+export interface Category {
+  id: string;
+  name: string;
+  visible: boolean;
+  priority: number;
+  img?: string;
+  projectId: string;
+  subcategories?: Subcategory[];
+}
+
+export interface Subcategory {
+  id: string;
+  name: string;
+  visible: boolean;
+  priority: number;
+  img?: string;
+  categoryId: string;
+  itemCount?: number;
+}

src/app/models/index.ts

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+export * from './project.model';
+export * from './category.model';
+export * from './item.model';

src/app/models/item.model.ts

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+export interface Item {
+  id: string;
+  name: string;
+  visible: boolean;
+  priority: number;
+  quantity: number;
+  price: number;
+  currency: string;
+  imgs: string[];
+  tags: string[];
+  simpleDescription: string;
+  description: ItemDescriptionField[];
+  subcategoryId: string;
+  comments?: Comment[];
+}
+
+export interface ItemDescriptionField {
+  key: string;
+  value: string;
+}
+
+export interface Comment {
+  id: string;
+  text: string;
+  createdAt: Date;
+  author?: string;
+}
+
+export interface ItemsListResponse {
+  items: Item[];
+  total: number;
+  page: number;
+  limit: number;
+  hasMore: boolean;
+}

src/app/models/project.model.ts

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+export interface Project {
+  id: string;
+  name: string;
+  displayName: string;
+  theme?: string;
+  logoUrl?: string;
+  active: boolean;
+}