change(cupang): 출고 상세를 읽기 전용 3열 보기로 교체, 수정 기능 제거

- detail.html / form.html 삭제, GET·POST /{id}/edit 라우트와
  _form_context / _parse_lines 헬퍼 제거
- GET /{id} → view.html: ① 품목 / ② 박스 요약(서버 재계산) / ③ 센터
  (박스 계산 화면과 같은 3열 구성, 편집 불가)
- 박스 계산 로직을 _compute_boxes 로 분리해 API 와 보기 화면이 공유

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/modules/cupang/router.py

@@ -93,16 +93,6 @@ def _guard(request: Request) -> tuple[Any, dict[str, Any]] | HTMLResponse | Redi
     return store, user
 
 
-def _parse_lines(lines_json: str) -> list[dict[str, Any]]:
-    try:
-        data = json.loads(lines_json or "[]")
-    except (json.JSONDecodeError, TypeError):
-        raise HTTPException(status_code=400, detail="라인 데이터 형식 오류")
-    if not isinstance(data, list):
-        raise HTTPException(status_code=400, detail="라인 데이터는 배열이어야 합니다.")
-    return data
-
-
 def _ym(request: Request) -> tuple[int, int]:
     today = today_kst()
     try:
@@ -342,23 +332,6 @@ async def export_shipments_xlsx(request: Request, date: str = "") -> Any:
 # ════════════════════════════════════════════════════════════
 # 출고 묶음 — 등록 / 수정 / 상세
 # ════════════════════════════════════════════════════════════
-def _form_context(request: Request, store: Any, user: dict[str, Any]) -> dict[str, Any]:
-    from app.main import build_erp_nav  # noqa: WPS433
-    from app.store import is_admin  # noqa: WPS433
-
-    reader = _itemcode(request)
-    return {
-        "user": user,
-        "is_admin": is_admin(user),
-        "nav_items": build_erp_nav(user, active="cupang"),
-        "centers": sorted(store.list_centers(), key=lambda c: c["name"]),
-        "box_rules": store.list_box_rules(),
-        "products": store.list_products(),
-        "ship_methods": list(SHIP_METHODS),
-        "search_enabled": bool(reader and reader.enabled),
-    }
-
-
 @router.get("/new")
 async def new_form(request: Request) -> RedirectResponse:
     """신규 등록 폼은 없앴다. 출고 묶음은 박스 계산의 [분배 확정] 으로만 만든다.
@@ -370,6 +343,10 @@ async def new_form(request: Request) -> RedirectResponse:
 
 @router.get("/{shipment_id:int}", response_class=HTMLResponse)
 async def detail(request: Request, shipment_id: int) -> HTMLResponse:
+    """출고 묶음 보기 — 박스 계산 화면과 같은 3열 구성(읽기 전용).
+
+    수정 기능은 없앴다. 잘못 만들었으면 달력에서 삭제하고 다시 확정한다.
+    """
     from app.main import build_erp_nav, render_template  # noqa: WPS433
     from app.store import is_admin  # noqa: WPS433
 
@@ -384,9 +361,22 @@ async def detail(request: Request, shipment_id: int) -> HTMLResponse:
             {"reason": "출고 묶음을 찾을 수 없습니다.", "is_admin": is_admin(user)},
             status_code=404,
         )
+
+    lines = ship.get("lines") or []
+    items = [
+        {
+            "product_code": ln.get("product_code"),
+            "product_name": ln.get("product_name_snapshot") or ln.get("product_code"),
+            "quantity": int(ln.get("quantity") or 0),
+        }
+        for ln in lines
+    ]
+    calc = _compute_boxes(store, items)
+    total_qty = sum(it["quantity"] for it in items)
+
     return render_template(
         request,
-        "cupang/detail.html",
+        "cupang/view.html",
         {
             "user": user,
             "is_admin": is_admin(user),
@@ -394,80 +384,13 @@ async def detail(request: Request, shipment_id: int) -> HTMLResponse:
             "page_title": f"출고 #{ship['id']}",
             "page_subtitle": f"{ship['ship_date']} · {ship['center_name_snapshot']}",
             "shipment": ship,
+            "items": items,
+            "calc": calc,
+            "total_qty": total_qty,
         },
     )
 
 
-@router.get("/{shipment_id:int}/edit", response_class=HTMLResponse)
-async def edit_form(request: Request, shipment_id: int) -> HTMLResponse:
-    from app.main import render_template  # noqa: WPS433
-    from app.store import is_admin  # noqa: WPS433
-
-    guard = _guard(request)
-    if not isinstance(guard, tuple):
-        return guard
-    store, user = guard
-    ship = store.get_shipment(shipment_id=shipment_id)
-    if not ship:
-        return render_template(
-            request, "denied.html",
-            {"reason": "출고 묶음을 찾을 수 없습니다.", "is_admin": is_admin(user)},
-            status_code=404,
-        )
-    ctx = _form_context(request, store, user)
-    ctx.update(
-        {
-            "page_title": f"출고 #{ship['id']} 수정",
-            "page_subtitle": "헤더/라인 수정 후 저장",
-            "mode": "edit",
-            "shipment": ship,
-            "default_date": ship["document_date"],
-        }
-    )
-    return render_template(request, "cupang/form.html", ctx)
-
-
-@router.post("/{shipment_id:int}/edit")
-async def update(
-    request: Request,
-    shipment_id: int,
-    lines_json: str = Form("[]"),
-    document_date: str = Form(...),
-    ship_date: str = Form(...),
-    center_arrival_date: str = Form(...),
-    center_id: str = Form(""),
-    center_name_snapshot: str = Form(""),
-    ship_method: str = Form("택배"),
-    outbound_summary: str = Form(""),
-    worker: str = Form(""),
-    memo: str = Form(""),
-    user: dict[str, Any] = Depends(_require_user),
-) -> RedirectResponse:
-    store = _store(request)
-    if store is None:
-        raise HTTPException(status_code=503, detail="cupang_db 미설정")
-    header = {
-        "document_date": document_date,
-        "ship_date": ship_date,
-        "center_arrival_date": center_arrival_date,
-        "center_id": center_id,
-        "center_name_snapshot": center_name_snapshot,
-        "ship_method": ship_method,
-        "outbound_summary": outbound_summary,
-        "worker": worker,
-        "memo": memo,
-    }
-    try:
-        store.update_shipment(
-            shipment_id=shipment_id, header=header, lines=_parse_lines(lines_json)
-        )
-    except KeyError:
-        raise HTTPException(status_code=404, detail="출고 묶음을 찾을 수 없습니다.")
-    except ValueError as exc:
-        raise HTTPException(status_code=400, detail=str(exc))
-    return RedirectResponse(url=f"/cupang/{shipment_id}", status_code=303)
-
-
 def _safe_next(raw: str, fallback: str) -> str:
     """열린 리다이렉트 방지 — /cupang/ 안쪽 경로만 허용."""
     nxt = (raw or "").strip()
@@ -1008,8 +931,6 @@ async def box_calc_api(
 
     클라이언트 계산을 신뢰하지 않고 store.compute_boxes 로 서버에서 계산한다.
     """
-    from .store import compute_boxes  # noqa: WPS433
-
     store = _store(request)
     if store is None:
         raise HTTPException(status_code=503, detail="cupang_db 미설정")
@@ -1018,6 +939,16 @@ async def box_calc_api(
     if not isinstance(raw_items, list):
         raise HTTPException(status_code=400, detail="items 는 배열이어야 합니다.")
 
+    return JSONResponse(_compute_boxes(store, raw_items))
+
+
+def _compute_boxes(store: Any, raw_items: list[Any]) -> dict[str, Any]:
+    """[{product_code, quantity}] → 제품별 박스 + 자투리 혼합 박스 + 합계.
+
+    박스 계산 화면(API)과 출고 상세 보기가 같은 결과를 쓰도록 한 곳에 둔다.
+    """
+    from .store import compute_boxes  # noqa: WPS433
+
     rules = {r["product_code"]: r for r in store.list_box_rules()}
 
     results: list[dict[str, Any]] = []
@@ -1063,14 +994,12 @@ async def box_calc_api(
     grand_total = sum(r["full_boxes"] or 0 for r in results if r["configured"])
     grand_total += sum(m["box_count"] for m in mixes)
 
-    return JSONResponse(
-        {
-            "results": results,
-            "totals": sorted(totals.values(), key=lambda t: t["box_name"]),
-            "mixes": mixes,
-            "grand_total_boxes": grand_total,
-        }
-    )
+    return {
+        "results": results,
+        "totals": sorted(totals.values(), key=lambda t: t["box_name"]),
+        "mixes": mixes,
+        "grand_total_boxes": grand_total,
+    }
 
 
 def _pack_leftovers(results: list[dict[str, Any]]) -> list[dict[str, Any]]: