Refactor item management: Update schemas, models, and API routes

- Renamed customs-related schemas in line_items to LineCustomCreate, LineCustomUpdate, and LineCustomResponse.
- Adjusted models to streamline invoice_id mapping in Item model.
- Enhanced item routes to include company_id in summary statistics endpoint.
- Refactored ItemService to improve item creation and update logic, removing redundant methods.
- Updated frontend components for item management, including new item creation and editing functionalities.
- Added API client for items with CRUD operations and improved error handling.

frontend/src/lib/api/dashboard/a76/items.ts

@@ -0,0 +1,133 @@
+/**
+ * API Client para Items
+ * Gestiona las operaciones CRUD para items de facturas
+ */
+import { api } from '$lib/api';
+
+// --- Interfaces ---
+
+export interface Item {
+	id?: number;
+	invoice_id: number;
+	item_type: string;
+	system_origin: string;
+	invoice_number?: string;
+	reference_number?: string;
+	order?: string;
+	guide_number?: string;
+	invoice_date?: number;
+	depreciation_date?: number;
+	rectification?: number;
+	warehouse?: string;
+	location?: string;
+	created_at?: string;
+	updated_at?: string;
+}
+
+export interface ItemListResponse {
+	items: Item[];
+	total: number;
+	skip: number;
+	limit: number;
+}
+
+export interface CreateItemData {
+	invoice_id: number;
+	item_type: string;
+	system_origin: string;
+	invoice_number?: string;
+	reference_number?: string;
+	order?: string;
+	guide_number?: string;
+	invoice_date?: number;
+	depreciation_date?: number;
+	rectification?: number;
+	warehouse?: string;
+	location?: string;
+}
+
+export interface UpdateItemData {
+	item_type?: string;
+	system_origin?: string;
+	invoice_number?: string;
+	reference_number?: string;
+	order?: string;
+	guide_number?: string;
+	invoice_date?: number;
+	depreciation_date?: number;
+	rectification?: boolean;
+	warehouse?: string;
+	location?: string;
+}
+
+/**
+ * API para Items
+ */
+export const itemsApi = {
+	/**
+	 * Lista todos los items con paginación
+	 */
+	list: (companyId: number, skip = 0, limit = 100, invoiceId?: number) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString(),
+			skip: skip.toString(),
+			limit: limit.toString()
+		});
+
+		if (invoiceId) {
+			params.append('invoice_id', invoiceId.toString());
+		}
+
+		return api.get<ItemListResponse>(`/v1/a76/items/?${params.toString()}`);
+	},
+
+	/**
+	 * Lista items por invoice ID
+	 */
+	listByInvoice: (invoiceId: number, companyId: number) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString()
+		});
+		return api.get<ItemListResponse>(`/v1/a76/items/invoice/${invoiceId}/items?${params.toString()}`);
+	},
+
+	/**
+	 * Obtiene un item por ID
+	 */
+	get: (itemId: number, companyId: number) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString()
+		});
+		return api.get<Item>(`/v1/a76/items/${itemId}?${params.toString()}`);
+	},
+
+	/**
+	 * Crea un nuevo item
+	 */
+	create: (companyId: number, data: CreateItemData) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString()
+		});
+		return api.post<Item>(`/v1/a76/items/?${params.toString()}`, data);
+	},
+
+	/**
+	 * Actualiza un item existente
+	 */
+	update: (itemId: number, companyId: number, data: UpdateItemData) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString()
+		});
+		return api.put<Item>(`/v1/a76/items/${itemId}?${params.toString()}`, data);
+	},
+
+	/**
+	 * Elimina un item
+	 */
+	delete: (itemId: number, companyId: number) => {
+		const params = new URLSearchParams({
+			company_id: companyId.toString()
+		});
+		return api.delete(`/v1/a76/items/${itemId}?${params.toString()}`);
+	}
+};