feat(cupang): 설정 화면 2열 개편 — itemcode 다중선택 등록 + 활성/삭제

- 수동 등록 카드 제거
- 왼쪽: itemcode_db 전체 목록(낱개+세트) 다중선택, 등록된 항목 진회색+흰글씨
  /cupang/api/products/all + /cupang/products/bulk(JSON 일괄 upsert)
- 오른쪽: 등록 제품명 목록 — 제품명/코드/상태 + 활성·비활성 토글 + 완전삭제
  /products/{id}/active (토글), /products/{id}/delete (hard delete)
- ItemcodeReader.list_all 추가

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

app/modules/cupang/router.py

@@ -15,7 +15,7 @@ import json
 from datetime import date, datetime
 from typing import Any
 
-from fastapi import APIRouter, Depends, Form, HTTPException, Request
+from fastapi import APIRouter, Body, Depends, Form, HTTPException, Request
 from fastapi.responses import (
     HTMLResponse,
     JSONResponse,
@@ -609,14 +609,54 @@ async def products_page(request: Request) -> HTMLResponse:
             "is_admin": is_admin(user),
             "nav_items": build_erp_nav(user, active="cupang"),
             "page_title": "쿠팡 밀크런 — 설정 (제품명)",
-            "page_subtitle": "제품명 리스트 관리. itemcode_db 에서 검색해 등록하면 폼 드롭다운에 노출됩니다.",
+            "page_subtitle": "왼쪽 itemcode_db 목록에서 선택해 등록하면 폼 드롭다운에 노출됩니다.",
             "products": store.list_products(include_inactive=True),
+            "registered_codes": [p["product_code"] for p in store.list_products(include_inactive=True)],
             "search_enabled": bool(reader and reader.enabled),
             "search_reason": (reader.reason if reader else ""),
         },
     )
 
 
+@router.get("/api/products/all")
+async def product_all(
+    request: Request, _: dict[str, Any] = Depends(_require_user)
+) -> JSONResponse:
+    """itemcode_db 전체 상품 목록(낱개+세트). 설정 화면 왼쪽 리스트 소스."""
+    reader = _itemcode(request)
+    return JSONResponse(
+        {
+            "enabled": bool(reader and reader.enabled),
+            "reason": (reader.reason if reader else "itemcode 리더 미초기화"),
+            "results": reader.list_all() if reader else [],
+        }
+    )
+
+
+@router.post("/products/bulk")
+async def product_bulk(
+    request: Request,
+    items: list[dict[str, Any]] = Body(..., embed=True),
+    user: dict[str, Any] = Depends(_require_user),
+) -> JSONResponse:
+    """선택한 상품들을 일괄 등록(upsert). body: {"items":[{"code","name"}, ...]}."""
+    store = _store(request)
+    if store is None:
+        raise HTTPException(status_code=503, detail="cupang_db 미설정")
+    added = 0
+    for it in items:
+        code = str(it.get("code") or "").strip()
+        name = str(it.get("name") or "").strip()
+        if not code or not name:
+            continue
+        try:
+            store.upsert_product(product_code=code, product_name=name)
+            added += 1
+        except ValueError:
+            continue
+    return JSONResponse({"ok": True, "added": added})
+
+
 @router.post("/products")
 async def product_upsert(
     request: Request,
@@ -637,17 +677,37 @@ async def product_upsert(
     return RedirectResponse(url="/cupang/products", status_code=303)
 
 
-@router.post("/products/{product_id:int}/delete")
-async def product_delete(
+@router.post("/products/{product_id:int}/active")
+async def product_set_active(
     request: Request,
     product_id: int,
+    active: 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")
     try:
-        store.deactivate_product(product_id=product_id)
+        store.set_product_active(
+            product_id=product_id, active=active in ("1", "true", "on", "True")
+        )
+    except KeyError:
+        raise HTTPException(status_code=404, detail="제품을 찾을 수 없습니다.")
+    return RedirectResponse(url="/cupang/products", status_code=303)
+
+
+@router.post("/products/{product_id:int}/delete")
+async def product_delete(
+    request: Request,
+    product_id: int,
+    user: dict[str, Any] = Depends(_require_user),
+) -> RedirectResponse:
+    """완전 삭제(hard delete)."""
+    store = _store(request)
+    if store is None:
+        raise HTTPException(status_code=503, detail="cupang_db 미설정")
+    try:
+        store.delete_product(product_id=product_id)
     except KeyError:
         raise HTTPException(status_code=404, detail="제품을 찾을 수 없습니다.")
     return RedirectResponse(url="/cupang/products", status_code=303)