feat: Implement Fixed Asset (FA) line item management

- Added new schemas for FA line items in the backend, including creation, update, and response DTOs.
- Updated existing line item schemas to include FA data.
- Modified database models to reflect new table names for line quantities and references.
- Enhanced ItemService to handle FA data during item creation and updates.
- Introduced new routes and service layer for FA line items, including CRUD operations.
- Updated frontend components to support FA line item data, including new fields and UI adjustments.
- Implemented data flattening for improved item display in the dashboard.

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

@@ -76,15 +76,52 @@ export interface LineReferences {
     serie_id?: number;
 }
 
+export interface FaLineItem {
+    id?: number;
+    tenant_id?: number;
+    company_id?: number;
+    
+    // Asset information (SCAF specific)
+    asset_number?: string;
+    asset_photo?: string;
+    equipment_message?: string;
+    invoice_type_asset?: string;
+    return_import_invoice?: string;
+    return_import_date?: number;
+    movement_type_import?: string;
+    
+    // Cross-references for import repair
+    search_invoice?: string;
+    search_line?: number;
+    
+    // Search type
+    search_type?: string;
+    
+	// Subitems
+	is_subitem?: boolean;
+	contains_subitems?: boolean;
+	includes_subitems?: boolean;
+	subitem_number?: number;
+
+    // Special flags
+    download?: boolean;
+    own_equipment?: boolean;
+    omit_annex31?: boolean;    
+    
+    // Timestamps
+    created_at?: string;
+    updated_at?: string;
+}
+
 export interface LineItem {
     id?: number;
     item_id?: number;
     line_number: number;
     
     // Identification
-    part_number?: string;
-    component_part_number?: string;
-    class_code?: string;
+    part_number_id?: string;
+    component_part_number_id?: string;
+    class_id?: number;
     identifier?: string;
 
     // Unit of Measure
@@ -106,6 +143,12 @@ export interface LineItem {
     payment_method?: string;
     igi_amount?: number;
 
+    // Computed fields from class_info relation
+    class_code?: string;
+    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;
@@ -113,6 +156,7 @@ export interface LineItem {
     quantity?: LineQuantities;
     description?: LineDescriptions;
     reference?: LineReferences;
+    fa_data?: FaLineItem; // Fixed Asset specific data
 }
 
 export interface Item {