- 모델 4개: Approval, ApprovalStep, ApprovalForm, ApprovalLine - ApprovalService: 목록/CRUD/워크플로우(상신/승인/반려/회수) 비즈니스 로직 - ApprovalApiController: JSON API 엔드포인트 (기안함/결재함/완료함/참조함) - ApprovalController: Blade 뷰 컨트롤러 (HX-Redirect 처리) - 뷰 8개: drafts, pending, completed, references, create, edit, show - partials: _status-badge, _step-progress, _approval-line-editor - api.php/web.php 라우트 등록