ui(cupang): 박스룰 폼 3행 배치 + 목록 컬럼 정리/하드삭제

- 폼: 1행 제품명180/제품코드100, 2행 박스이름/박스당입수량, 3행 메모(전체폭)
- 목록 순서 제품명·제품코드·박스명·입수량·메모, 상태열/비활성 제거
- 삭제 버튼=완전삭제(delete_box_rule, 참조 라인 box_rule_id NULL 처리)
- 캐시 버전 f

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/templates/erp_base.html

@@ -4,8 +4,8 @@
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>{{ page_title or "ERP" }} — DBX Corporation</title>
-    <link rel="stylesheet" href="/static/erp.css?v=20260530e" />
-    <link rel="stylesheet" href="/static/erp-shell.css?v=20260530e" />
+    <link rel="stylesheet" href="/static/erp.css?v=20260530f" />
+    <link rel="stylesheet" href="/static/erp-shell.css?v=20260530f" />
     <link rel="stylesheet" href="/static/erp-attach-viewer.css" />
     {% block head_extra %}{% endblock %}
   </head>