Enhance backend controllers, frontend pages, and V2 components

- Fix department, receiving, shippingOrder, shippingPlan controllers
- Update admin pages (company management, disk usage)
- Improve sales/logistics pages (order, shipping, outbound, receiving)
- Enhance V2 components (file-upload, split-panel-layout, table-list)
- Add SmartSelect common component
- Update DataGrid, FullscreenDialog common components
- Add gitignore rules for personal pipeline tools

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/types/department.ts

@@ -41,6 +41,7 @@ export interface UserDepartmentMapping {
 export interface DepartmentFormData {
   dept_name: string; // 부서명 (필수)
   parent_dept_code?: string | null; // 상위 부서 코드
+  dept_code?: string; // 채번 시스템으로 할당된 부서코드 (선택)
 }
 
 // 부서 트리 노드 (UI용)