refactor: restructure item interfaces and update related components

- Renamed LineItem interface to Item and adjusted properties accordingly.
- Updated CreateItemData and UpdateItemData interfaces to reflect new structure.
- Modified components to use the new Item interface, removing nested lines.
- Adjusted data binding in item configuration, main data, and other related components.
- Simplified item creation and editing logic by removing unnecessary nesting.
- Ensured all references to line items are updated to reflect the new structure.

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

@@ -122,9 +122,9 @@ export interface FaLineItem {
     updated_at?: string;
 }
 
-export interface LineItem {
-    id?: number;
-    item_id?: number;
+export interface Item {
+	id?: number;
+    invoice_id: number;        
     line_number: number;
     
     // Identification
@@ -162,20 +162,7 @@ export interface LineItem {
     class_description?: string;
     
     // Computed field from unit_of_measure_info relation
-    unit_of_measure_code?: string;
-    
-    // Nested relations (Singular names to match backend Pydantic models)
-    customs?: LineCustoms;
-    financial?: LineFinancials;
-    quantity?: LineQuantities;
-    description?: LineDescriptions;
-    reference?: LineReferences;
-    fa_data?: FaLineItem; // Fixed Asset specific data
-}
-
-export interface Item {
-	id?: number;
-    invoice_id: number;
+    unit_of_measure_code?: string;        
 	reference_number?: string;
 	order?: string;
 	guide_number?: string;	
@@ -185,8 +172,14 @@ export interface Item {
 	location?: string;
 	created_at?: string;
 	updated_at?: string;
-    
-    lines?: LineItem[];
+
+    // Nested relations (Singular names to match backend Pydantic models)
+    customs?: LineCustoms;
+    financial?: LineFinancials;
+    quantity?: LineQuantities;
+    description?: LineDescriptions;
+    reference?: LineReferences;
+    fa_data?: FaLineItem; // Fixed Asset specific data    
 }
 
 export interface ItemListResponse {
@@ -196,28 +189,11 @@ export interface ItemListResponse {
 	limit: number;
 }
 
-export interface CreateItemData {
+export interface CreateItemData extends Omit<Item, 'id' | 'created_at' | 'updated_at'> {
 	invoice_id: number;
-	reference_number?: string;
-	order?: string;
-	guide_number?: string;	
-	depreciation_date?: number;
-	rectification?: number;
-	warehouse?: string;
-	location?: string;
-    lines?: LineItem[];
 }
 
-export interface UpdateItemData {
-	reference_number?: string;
-	order?: string;
-	guide_number?: string;	
-	depreciation_date?: number;
-	rectification?: boolean;
-	warehouse?: string;
-	location?: string;
-    lines?: LineItem[];
-}
+export interface UpdateItemData extends Partial<Omit<Item, 'id' | 'invoice_id' | 'created_at' | 'updated_at'>> {}
 
 /**
  * API para Items