feat(inventory+warehouse): 재고 이동 + 모바일 카드 + 창고코드 자동생성

[재고 관리]
- 새 기능 '재고 이동' (A창고 → B창고): 출발창고 잠금 + 충분재고 검증 + 도착
  창고 upsert + 이동 로그 2건(OUT/IN, ref_type=TRANSFER) 트랜잭션 처리
- /api/m/inventory/transfer 신규
- 모바일에서 테이블 가로 스크롤이 안 되던 문제 → sm:hidden 카드 + sm:block
  desktop 테이블로 분리. 페이지 자체 스크롤로 자연스러운 UX
- 검색 영역 모바일 1열 / sm 3열 그리드 정리
- 재고 이동 모달은 출발창고 선택 시 그 창고에 재고 있는 품목만 셀렉트
- list API 응답에 WH_OBJID 추가 (이동 모달에서 출발창고 필터 용도)

[창고 관리]
- 창고 코드는 자동생성(WH001, WH002 ...) — 등록/수정 폼에서 readonly + 회색.
  save API: regist 시 nextWhCode() 로 MAX+1 패딩. update 시 wh_code 미변경
- 클라이언트가 whCode 보내도 무시되도록 서버에서 분기

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/app/(main)/m/admin/inventory/page.tsx

@@ -1,11 +1,11 @@
 "use client";
 
-import { useEffect, useState } from "react";
+import { useEffect, useMemo, useState } from "react";
-import { Plus, Search, Trash2, History } from "lucide-react";
+import { Plus, Search, Trash2, History, ArrowRightLeft, Package } from "lucide-react";
 import { useRouter } from "next/navigation";
 import Swal from "sweetalert2";
 
-interface Stock { OBJID: string; WH_CODE: string; WH_NAME: string; ITEM_OBJID: string; ITEM_CODE: string; ITEM_NAME: string; UNIT: string; IS_TAX_FREE: string; QTY: number; UPDATE_DATE: string }
+interface Stock { OBJID: string; WH_OBJID: string; WH_CODE: string; WH_NAME: string; ITEM_OBJID: string; ITEM_CODE: string; ITEM_NAME: string; UNIT: string; IS_TAX_FREE: string; QTY: number; UPDATE_DATE: string }
 interface Wh { OBJID: string; WH_CODE: string; WH_NAME: string }
 interface Item { OBJID: string; ITEM_CODE: string; ITEM_NAME: string; UNIT_PRICE: number }
 interface InboundLine { itemObjid: string; itemName: string; qty: number; costPrice?: number }
@@ -20,6 +20,7 @@ export default function InventoryPage() {
   const [whFilter, setWhFilter] = useState("");
   const [keyword, setKeyword] = useState("");
   const [inboundOpen, setInboundOpen] = useState(false);
+  const [transferOpen, setTransferOpen] = useState(false);
 
   // 입고 폼
   const [inboundWh, setInboundWh] = useState("");
@@ -27,6 +28,12 @@ export default function InventoryPage() {
   const [pickItem, setPickItem] = useState("");
   const [pickQty, setPickQty] = useState(1);
 
+  // 이동 폼
+  const [trFrom, setTrFrom] = useState("");
+  const [trTo, setTrTo] = useState("");
+  const [trItem, setTrItem] = useState("");
+  const [trQty, setTrQty] = useState(1);
+
   const load = async () => {
     const res = await fetch("/api/m/inventory/list", {
       method: "POST", headers: { "Content-Type": "application/json" },
@@ -73,84 +80,164 @@ export default function InventoryPage() {
     }
   };
 
+  // 출발 창고에 재고가 있는 품목만 추리기 (현재 화면 list 기준)
+  const trItemsInFrom = useMemo(() => {
+    if (!trFrom) return [] as Stock[];
+    return list.filter((s) => s.WH_OBJID === trFrom && Number(s.QTY) > 0);
+  }, [list, trFrom]);
+
+  const trCurrent = useMemo(() => {
+    if (!trFrom || !trItem) return 0;
+    return Number(list.find((s) => s.WH_OBJID === trFrom && s.ITEM_OBJID === trItem)?.QTY ?? 0);
+  }, [list, trFrom, trItem]);
+
+  const submitTransfer = async () => {
+    if (!trFrom || !trTo || !trItem || trQty <= 0) {
+      Swal.fire({ icon: "warning", title: "출발창고/도착창고/품목/수량을 입력하세요." });
+      return;
+    }
+    if (trFrom === trTo) {
+      Swal.fire({ icon: "warning", title: "출발창고와 도착창고가 같습니다." });
+      return;
+    }
+    if (trQty > trCurrent) {
+      Swal.fire({ icon: "warning", title: "재고 부족", text: `현재고 ${trCurrent}` });
+      return;
+    }
+    const res = await fetch("/api/m/inventory/transfer", {
+      method: "POST", headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ fromWhObjid: trFrom, toWhObjid: trTo, itemObjid: trItem, qty: trQty }),
+    });
+    const j = await res.json().catch(() => ({ success: false, message: "응답 파싱 실패" }));
+    if (j.success) {
+      Swal.fire({ icon: "success", title: "재고 이동 완료", text: j.message, timer: 1500, showConfirmButton: false });
+      setTransferOpen(false);
+      setTrFrom(""); setTrTo(""); setTrItem(""); setTrQty(1);
+      load();
+    } else {
+      Swal.fire({ icon: "error", title: "이동 실패", text: j.message });
+    }
+  };
+
   return (
-    <div className="space-y-4">
+    <div className="space-y-3">
-      <div className="flex items-center justify-between">
+      <div className="flex items-center justify-between flex-wrap gap-2">
-        <h1 className="text-2xl font-bold">재고 관리</h1>
+        <h1 className="text-xl sm:text-2xl font-bold">재고 관리</h1>
-        <div className="flex gap-2">
+        <div className="flex gap-2 flex-wrap">
           <button
             onClick={() => router.push("/m/admin/inventory/history")}
-            className="px-4 h-10 inline-flex items-center gap-2 rounded-lg border border-slate-200 bg-white text-slate-700 text-sm font-semibold hover:bg-slate-50"
+            className="h-9 sm:h-10 px-3 inline-flex items-center gap-1.5 rounded-lg border border-slate-200 bg-white text-slate-700 text-xs sm:text-sm font-semibold hover:bg-slate-50"
           >
-            <History size={15} /> 재고 이력
+            <History size={14} /> 이력
           </button>
-          <button onClick={() => setInboundOpen(true)} className="px-4 h-10 inline-flex items-center gap-2 rounded-lg bg-emerald-700 text-white text-sm font-bold">
+          <button
-            <Plus size={16} /> 매입 입고
+            onClick={() => setTransferOpen(true)}
+            className="h-9 sm:h-10 px-3 inline-flex items-center gap-1.5 rounded-lg bg-sky-600 text-white text-xs sm:text-sm font-bold hover:bg-sky-700"
+          >
+            <ArrowRightLeft size={14} /> 재고 이동
+          </button>
+          <button onClick={() => setInboundOpen(true)} className="h-9 sm:h-10 px-3 inline-flex items-center gap-1.5 rounded-lg bg-emerald-700 text-white text-xs sm:text-sm font-bold hover:bg-emerald-800">
+            <Plus size={14} /> 매입 입고
           </button>
         </div>
       </div>
 
-      <div className="flex gap-2 flex-wrap">
+      {/* 검색 영역 — 모바일 1열 / sm 2열 / lg 옆으로 */}
-        <select value={whFilter} onChange={(e) => setWhFilter(e.target.value)} className="h-10 px-3 rounded-lg border border-slate-200 text-sm">
+      <div className="bg-white border border-slate-200 rounded-xl p-2.5">
-          <option value="">전체 창고</option>
+        <div className="grid grid-cols-1 sm:grid-cols-[1fr_2fr_auto] gap-2">
-          {whs.map((w) => <option key={w.OBJID} value={w.OBJID}>{w.WH_NAME}</option>)}
+          <select value={whFilter} onChange={(e) => setWhFilter(e.target.value)} className="h-9 px-3 rounded-lg border border-slate-200 text-sm bg-white">
-        </select>
+            <option value="">전체 창고</option>
-        <div className="relative flex-1 max-w-sm">
+            {whs.map((w) => <option key={w.OBJID} value={w.OBJID}>{w.WH_NAME}</option>)}
-          <Search size={16} className="absolute left-3 top-1/2 -translate-y-1/2 text-slate-400" />
+          </select>
-          <input value={keyword} onChange={(e) => setKeyword(e.target.value)} onKeyDown={(e) => e.key === "Enter" && load()} placeholder="품목명/코드" className="w-full h-10 pl-9 pr-3 rounded-lg border border-slate-200 text-sm" />
+          <div className="relative">
+            <Search size={14} className="absolute left-3 top-1/2 -translate-y-1/2 text-slate-400" />
+            <input value={keyword} onChange={(e) => setKeyword(e.target.value)} onKeyDown={(e) => e.key === "Enter" && load()} placeholder="품목명 / 코드" className="w-full h-9 pl-8 pr-3 rounded-lg border border-slate-200 text-sm" />
+          </div>
+          <button onClick={load} className="h-9 px-4 rounded-lg bg-slate-800 text-white text-sm font-semibold">조회</button>
         </div>
-        <button onClick={load} className="h-10 px-4 rounded-lg bg-slate-800 text-white text-sm font-semibold">조회</button>
       </div>
 
-      <div className="bg-white border border-slate-200 rounded-xl overflow-hidden">
+      {/* 데스크톱 테이블 */}
-        <table className="w-full text-sm">
+      <div className="hidden sm:block bg-white border border-slate-200 rounded-xl overflow-hidden">
-          <thead className="bg-slate-50 text-slate-600">
+        <div className="overflow-x-auto">
-            <tr>
+          <table className="w-full text-sm min-w-[640px]">
-              <th className="text-left px-4 py-3">창고</th>
+            <thead className="bg-slate-50 text-slate-600">
-              <th className="text-left px-4 py-3">품목코드</th>
+              <tr>
-              <th className="text-left px-4 py-3">품목명</th>
+                <th className="text-left px-4 py-3">창고</th>
-              <th className="text-center px-4 py-3">구분</th>
+                <th className="text-left px-4 py-3">품목코드</th>
-              <th className="text-right px-4 py-3">현재고</th>
+                <th className="text-left px-4 py-3">품목명</th>
-              <th className="text-left px-4 py-3">최종 변경</th>
+                <th className="text-center px-4 py-3">구분</th>
-            </tr>
+                <th className="text-right px-4 py-3">현재고</th>
-          </thead>
+                <th className="text-left px-4 py-3">최종 변경</th>
-          <tbody>
-            {list.length === 0 ? (
-              <tr><td colSpan={6} className="text-center py-12 text-slate-400">재고 데이터가 없습니다. 매입 입고로 등록하세요.</td></tr>
-            ) : list.map((s) => (
-              <tr key={s.OBJID} className="border-t border-slate-100">
-                <td className="px-4 py-3">{s.WH_NAME}</td>
-                <td className="px-4 py-3 font-mono text-xs">{s.ITEM_CODE}</td>
-                <td className="px-4 py-3 font-semibold">{s.ITEM_NAME}</td>
-                <td className="px-4 py-3 text-center">
-                  {s.IS_TAX_FREE === "Y"
-                    ? <span className="px-1.5 py-0.5 rounded bg-violet-100 text-violet-700 text-[10px] font-bold">면세</span>
-                    : <span className="px-1.5 py-0.5 rounded bg-rose-100 text-rose-700 text-[10px] font-bold">과세</span>}
-                </td>
-                <td className="px-4 py-3 text-right tabular-nums font-bold">{fmt(s.QTY)} {s.UNIT}</td>
-                <td className="px-4 py-3 text-slate-500 text-xs">{s.UPDATE_DATE}</td>
               </tr>
-            ))}
+            </thead>
-          </tbody>
+            <tbody>
-        </table>
+              {list.length === 0 ? (
+                <tr><td colSpan={6} className="text-center py-12 text-slate-400">재고 데이터가 없습니다. 매입 입고로 등록하세요.</td></tr>
+              ) : list.map((s) => (
+                <tr key={s.OBJID} className="border-t border-slate-100">
+                  <td className="px-4 py-3">{s.WH_NAME}</td>
+                  <td className="px-4 py-3 font-mono text-xs">{s.ITEM_CODE}</td>
+                  <td className="px-4 py-3 font-semibold">{s.ITEM_NAME}</td>
+                  <td className="px-4 py-3 text-center">
+                    {s.IS_TAX_FREE === "Y"
+                      ? <span className="px-1.5 py-0.5 rounded bg-violet-100 text-violet-700 text-[10px] font-bold">면세</span>
+                      : <span className="px-1.5 py-0.5 rounded bg-rose-100 text-rose-700 text-[10px] font-bold">과세</span>}
+                  </td>
+                  <td className="px-4 py-3 text-right tabular-nums font-bold">{fmt(s.QTY)} {s.UNIT}</td>
+                  <td className="px-4 py-3 text-slate-500 text-xs">{s.UPDATE_DATE}</td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      </div>
+
+      {/* 모바일 카드 — 페이지 자체 스크롤 사용 (테이블 가로 스크롤 X) */}
+      <div className="sm:hidden space-y-2">
+        {list.length === 0 ? (
+          <div className="bg-white border border-slate-200 rounded-xl py-12 text-center text-slate-400 text-sm">
+            <Package size={32} className="mx-auto mb-2 opacity-50" />
+            재고 데이터가 없습니다.
+          </div>
+        ) : list.map((s) => (
+          <div key={s.OBJID} className="bg-white border border-slate-200 rounded-xl p-3">
+            <div className="flex items-start justify-between gap-2">
+              <div className="min-w-0 flex-1">
+                <div className="text-[10px] text-slate-400 font-mono">{s.ITEM_CODE}</div>
+                <div className="font-bold text-sm text-slate-900 truncate">{s.ITEM_NAME}</div>
+                <div className="text-[11px] text-slate-500 mt-0.5">{s.WH_NAME}</div>
+              </div>
+              <div className="text-right shrink-0">
+                <div className="text-lg font-bold tabular-nums text-emerald-700">{fmt(s.QTY)}<span className="text-xs ml-0.5 text-slate-500">{s.UNIT}</span></div>
+                {s.IS_TAX_FREE === "Y"
+                  ? <span className="px-1.5 py-0.5 rounded bg-violet-100 text-violet-700 text-[9px] font-bold">면세</span>
+                  : <span className="px-1.5 py-0.5 rounded bg-rose-100 text-rose-700 text-[9px] font-bold">과세</span>}
+              </div>
+            </div>
+            <div className="mt-2 pt-2 border-t border-slate-100 text-[10px] text-slate-400">
+              최종 변경 · {s.UPDATE_DATE}
+            </div>
+          </div>
+        ))}
       </div>
 
       {/* 입고 모달 */}
       {inboundOpen && (
-        <div className="fixed inset-0 bg-slate-900/60 z-50 flex items-center justify-center p-4" onClick={() => setInboundOpen(false)}>
+        <div className="fixed inset-0 bg-slate-900/60 z-50 flex items-end sm:items-center justify-center p-0 sm:p-4" onClick={() => setInboundOpen(false)}>
-          <div onClick={(e) => e.stopPropagation()} className="bg-white rounded-xl max-w-2xl w-full p-6 max-h-[90vh] overflow-y-auto">
+          <div onClick={(e) => e.stopPropagation()} className="bg-white rounded-t-xl sm:rounded-xl max-w-2xl w-full p-4 sm:p-6 max-h-[90vh] overflow-y-auto">
             <h3 className="font-bold mb-4">매입 입고 등록</h3>
             <div className="space-y-3">
-              <select value={inboundWh} onChange={(e) => setInboundWh(e.target.value)} className="w-full h-10 px-3 rounded-lg border border-slate-200">
+              <select value={inboundWh} onChange={(e) => setInboundWh(e.target.value)} className="w-full h-10 px-3 rounded-lg border border-slate-200 bg-white">
                 <option value="">창고 선택</option>
                 {whs.map((w) => <option key={w.OBJID} value={w.OBJID}>{w.WH_NAME}</option>)}
               </select>
-              <div className="flex gap-2">
+              <div className="grid grid-cols-[1fr_80px_auto] gap-2">
-                <select value={pickItem} onChange={(e) => setPickItem(e.target.value)} className="flex-1 h-10 px-3 rounded-lg border border-slate-200">
+                <select value={pickItem} onChange={(e) => setPickItem(e.target.value)} className="h-10 px-3 rounded-lg border border-slate-200 bg-white min-w-0">
                   <option value="">품목 선택</option>
                   {items.map((i) => <option key={i.OBJID} value={i.OBJID}>{i.ITEM_NAME}</option>)}
                 </select>
-                <input type="number" min={1} value={pickQty} onChange={(e) => setPickQty(Number(e.target.value))} className="w-24 h-10 px-3 rounded-lg border border-slate-200" />
+                <input type="number" min={1} value={pickQty} onChange={(e) => setPickQty(Number(e.target.value))} className="h-10 px-3 rounded-lg border border-slate-200" />
                 <button onClick={addLine} className="h-10 px-4 rounded-lg bg-slate-800 text-white text-sm font-semibold">추가</button>
               </div>
               <div className="border border-slate-200 rounded-lg max-h-60 overflow-y-auto">
@@ -158,7 +245,7 @@ export default function InventoryPage() {
                   <div className="text-center text-slate-400 text-sm py-8">품목을 추가하세요</div>
                 ) : (
                   <table className="w-full text-sm">
-                    <thead className="bg-slate-50 text-slate-600 text-xs">
+                    <thead className="bg-slate-50 text-slate-600 text-xs sticky top-0">
                       <tr><th className="px-3 py-2 text-left">품목</th><th className="px-3 py-2 text-right">수량</th><th></th></tr>
                     </thead>
                     <tbody>
@@ -183,6 +270,51 @@ export default function InventoryPage() {
           </div>
         </div>
       )}
+
+      {/* 재고 이동 모달 — A창고 → B창고 */}
+      {transferOpen && (
+        <div className="fixed inset-0 bg-slate-900/60 z-50 flex items-end sm:items-center justify-center p-0 sm:p-4" onClick={() => setTransferOpen(false)}>
+          <div onClick={(e) => e.stopPropagation()} className="bg-white rounded-t-xl sm:rounded-xl max-w-md w-full p-4 sm:p-6 max-h-[90vh] overflow-y-auto">
+            <h3 className="font-bold mb-1 inline-flex items-center gap-1.5"><ArrowRightLeft size={16} className="text-sky-600" /> 재고 이동</h3>
+            <p className="text-xs text-slate-500 mb-4">A창고에서 B창고로 수량을 옮깁니다.</p>
+            <div className="space-y-3">
+              <div>
+                <label className="block text-[11px] font-semibold text-slate-500 mb-1">출발 창고 (A)</label>
+                <select value={trFrom} onChange={(e) => { setTrFrom(e.target.value); setTrItem(""); }} className="w-full h-10 px-3 rounded-lg border border-slate-200 bg-white">
+                  <option value="">선택</option>
+                  {whs.map((w) => <option key={w.OBJID} value={w.OBJID}>{w.WH_NAME}</option>)}
+                </select>
+              </div>
+              <div>
+                <label className="block text-[11px] font-semibold text-slate-500 mb-1">도착 창고 (B)</label>
+                <select value={trTo} onChange={(e) => setTrTo(e.target.value)} className="w-full h-10 px-3 rounded-lg border border-slate-200 bg-white">
+                  <option value="">선택</option>
+                  {whs.filter((w) => w.OBJID !== trFrom).map((w) => <option key={w.OBJID} value={w.OBJID}>{w.WH_NAME}</option>)}
+                </select>
+              </div>
+              <div>
+                <label className="block text-[11px] font-semibold text-slate-500 mb-1">품목 {trFrom && <span className="text-slate-400">(출발창고 재고가 있는 품목만)</span>}</label>
+                <select value={trItem} onChange={(e) => setTrItem(e.target.value)} disabled={!trFrom} className="w-full h-10 px-3 rounded-lg border border-slate-200 bg-white disabled:bg-slate-50">
+                  <option value="">{trFrom ? "선택" : "출발창고 먼저 선택"}</option>
+                  {trItemsInFrom.map((s) => (
+                    <option key={s.ITEM_OBJID} value={s.ITEM_OBJID}>{s.ITEM_NAME} (재고 {fmt(s.QTY)} {s.UNIT})</option>
+                  ))}
+                </select>
+              </div>
+              <div>
+                <label className="block text-[11px] font-semibold text-slate-500 mb-1">
+                  이동 수량 {trItem && <span className="text-emerald-700 font-bold">최대 {fmt(trCurrent)}</span>}
+                </label>
+                <input type="number" min={1} max={trCurrent || undefined} value={trQty} onChange={(e) => setTrQty(Number(e.target.value))} className="w-full h-10 px-3 rounded-lg border border-slate-200 text-right tabular-nums" />
+              </div>
+            </div>
+            <div className="flex gap-2 justify-end mt-5">
+              <button onClick={() => setTransferOpen(false)} className="px-4 h-10 rounded-lg border border-slate-200 text-sm font-semibold">취소</button>
+              <button onClick={submitTransfer} disabled={!trFrom || !trTo || !trItem || trQty <= 0} className="px-5 h-10 rounded-lg bg-sky-600 text-white text-sm font-bold disabled:opacity-50">이동</button>
+            </div>
+          </div>
+        </div>
+      )}
     </div>
   );
 }

src/app/(main)/m/admin/warehouses/page.tsx

@@ -34,7 +34,7 @@ export default function WarehousesPage() {
       method: "POST", headers: { "Content-Type": "application/json" },
       body: JSON.stringify({
         objid: editing.OBJID, actionType: editing.OBJID ? "update" : "regist",
-        whCode: editing.WH_CODE, whName: editing.WH_NAME,
+        whName: editing.WH_NAME,
         location: editing.LOCATION, whType: editing.WH_TYPE || "STOCK",
       }),
     });
@@ -119,7 +119,14 @@ export default function WarehousesPage() {
             className="bg-white rounded-xl max-w-md w-full p-5 sm:p-6 max-h-[90vh] overflow-y-auto">
             <h3 className="font-bold text-base sm:text-lg mb-4">{editing.OBJID ? "창고 수정" : "창고 추가"}</h3>
             <div className="space-y-3">
-              <input required placeholder="코드 (예: WH005)" value={editing.WH_CODE ?? ""} onChange={(e) => setEditing({ ...editing, WH_CODE: e.target.value })} className="w-full h-10 px-3 rounded-lg border border-slate-200 text-sm" />
+              <div>
+                <label className="block text-[11px] font-semibold text-slate-500 mb-1">코드 <span className="text-slate-400 font-normal">(자동 생성, 수정 불가)</span></label>
+                <input
+                  readOnly
+                  value={editing.OBJID ? (editing.WH_CODE ?? "") : "등록 시 자동 생성"}
+                  className="w-full h-10 px-3 rounded-lg border border-slate-200 text-sm bg-slate-50 text-slate-500 font-mono"
+                />
+              </div>
               <input required placeholder="이름" value={editing.WH_NAME ?? ""} onChange={(e) => setEditing({ ...editing, WH_NAME: e.target.value })} className="w-full h-10 px-3 rounded-lg border border-slate-200 text-sm" />
               <select value={editing.WH_TYPE ?? "STOCK"} onChange={(e) => setEditing({ ...editing, WH_TYPE: e.target.value })} className="w-full h-10 px-3 rounded-lg border border-slate-200 text-sm bg-white">
                 {Object.entries(TYPE_LABEL).map(([k, v]) => <option key={k} value={k}>{v}</option>)}

src/app/api/m/inventory/list/route.ts

@@ -25,6 +25,7 @@ export async function POST(req: NextRequest) {
   const rows = await queryRows(
     `SELECT
        S.objid       AS "OBJID",
+       W.objid       AS "WH_OBJID",
        W.wh_code     AS "WH_CODE",
        W.wh_name     AS "WH_NAME",
        I.objid       AS "ITEM_OBJID",

src/app/api/m/inventory/transfer/route.ts

@@ -0,0 +1,72 @@
+// 재고 이동 (A창고 → B창고). 출발창고 차감 + 도착창고 가산 + 이동 로그 2건
+import { NextRequest, NextResponse } from "next/server";
+import { pool } from "@/lib/db";
+import { createObjectId } from "@/lib/utils";
+import { requireMomoAdmin } from "@/lib/momo-guard";
+
+export async function POST(req: NextRequest) {
+  const g = await requireMomoAdmin();
+  if (g instanceof NextResponse) return g;
+  const userId = g.user.objid || g.user.userId;
+
+  const { fromWhObjid, toWhObjid, itemObjid, qty, memo } = await req.json().catch(() => ({})) as {
+    fromWhObjid?: string; toWhObjid?: string; itemObjid?: string; qty?: number; memo?: string;
+  };
+
+  if (!fromWhObjid || !toWhObjid || !itemObjid || !qty || qty <= 0) {
+    return NextResponse.json({ success: false, message: "출발창고/도착창고/품목/수량을 입력하세요." }, { status: 400 });
+  }
+  if (fromWhObjid === toWhObjid) {
+    return NextResponse.json({ success: false, message: "출발창고와 도착창고가 같습니다." }, { status: 400 });
+  }
+
+  const client = await pool.connect();
+  try {
+    await client.query("BEGIN");
+
+    // 출발 재고 잠금 + 충분 여부 확인
+    const cur = await client.query<{ qty: number }>(
+      `SELECT qty::int FROM momo_stocks WHERE wh_objid=$1 AND item_objid=$2 FOR UPDATE`,
+      [fromWhObjid, itemObjid]
+    );
+    const have = cur.rows[0]?.qty ?? 0;
+    if (have < qty) {
+      await client.query("ROLLBACK");
+      return NextResponse.json({ success: false, message: `출발창고 재고가 부족합니다. (현재고 ${have})` }, { status: 400 });
+    }
+
+    // 출발 차감
+    await client.query(
+      `UPDATE momo_stocks SET qty = qty - $3, update_date = NOW()
+       WHERE wh_objid = $1 AND item_objid = $2`,
+      [fromWhObjid, itemObjid, qty]
+    );
+
+    // 도착 가산 (없으면 생성)
+    await client.query(
+      `INSERT INTO momo_stocks (objid, wh_objid, item_objid, qty, update_date)
+       VALUES ($1, $2, $3, $4, NOW())
+       ON CONFLICT (wh_objid, item_objid) DO UPDATE
+         SET qty = momo_stocks.qty + EXCLUDED.qty, update_date = NOW()`,
+      [createObjectId(), toWhObjid, itemObjid, qty]
+    );
+
+    // 이동 로그 — 출발(OUT) + 도착(IN)
+    await client.query(
+      `INSERT INTO momo_stock_moves (objid, wh_objid, item_objid, move_type, qty, ref_type, memo, regdate, regid)
+       VALUES ($1, $2, $3, 'OUT', $4, 'TRANSFER', $5, NOW(), $6),
+              ($7, $8, $3, 'IN',  $4, 'TRANSFER', $5, NOW(), $6)`,
+      [createObjectId(), fromWhObjid, itemObjid, qty, memo ?? null, userId, createObjectId(), toWhObjid]
+    );
+
+    await client.query("COMMIT");
+    return NextResponse.json({ success: true, message: `${qty} 단위 이동 완료` });
+  } catch (err) {
+    await client.query("ROLLBACK").catch(() => {});
+    const msg = err instanceof Error ? err.message : String(err);
+    console.error("[transfer]", err);
+    return NextResponse.json({ success: false, message: msg }, { status: 500 });
+  } finally {
+    client.release();
+  }
+}

src/app/api/m/warehouses/save/route.ts

@@ -1,28 +1,40 @@
 import { NextRequest, NextResponse } from "next/server";
-import { execute } from "@/lib/db";
+import { execute, queryOne } from "@/lib/db";
 import { createObjectId } from "@/lib/utils";
 import { requireMomoAdmin } from "@/lib/momo-guard";
 
+// 다음 자동 코드 생성: WH001, WH002 ... — 가장 큰 숫자 + 1
+async function nextWhCode(): Promise<string> {
+  const row = await queryOne<{ MAX_CODE: string | null }>(
+    `SELECT MAX(wh_code) AS "MAX_CODE" FROM momo_warehouses WHERE wh_code ~ '^WH[0-9]+$'`
+  );
+  const max = row?.MAX_CODE;
+  const nextNum = max ? parseInt(max.replace(/^WH/, ""), 10) + 1 : 1;
+  return `WH${String(nextNum).padStart(3, "0")}`;
+}
+
 export async function POST(req: NextRequest) {
   const g = await requireMomoAdmin();
   if (g instanceof NextResponse) return g;
 
-  const { objid, actionType, whCode, whName, location, whType } = await req.json();
+  const { objid, actionType, whName, location, whType } = await req.json();
-  if (!whCode || !whName) {
+  if (!whName) {
-    return NextResponse.json({ success: false, message: "코드와 이름은 필수입니다." }, { status: 400 });
+    return NextResponse.json({ success: false, message: "창고명은 필수입니다." }, { status: 400 });
   }
   if (actionType === "regist") {
     const id = createObjectId();
+    const code = await nextWhCode();
     await execute(
       `INSERT INTO momo_warehouses (objid, wh_code, wh_name, location, wh_type, regdate)
        VALUES ($1,$2,$3,$4,$5,NOW())`,
-      [id, whCode, whName, location ?? null, whType ?? "STOCK"]
+      [id, code, whName, location ?? null, whType ?? "STOCK"]
     );
-    return NextResponse.json({ success: true, objId: id });
+    return NextResponse.json({ success: true, objId: id, whCode: code });
   }
+  // 수정 시 wh_code 는 손대지 않음
   await execute(
-    `UPDATE momo_warehouses SET wh_code=$2, wh_name=$3, location=$4, wh_type=$5 WHERE objid=$1`,
+    `UPDATE momo_warehouses SET wh_name=$2, location=$3, wh_type=$4 WHERE objid=$1`,
-    [objid, whCode, whName, location ?? null, whType ?? "STOCK"]
+    [objid, whName, location ?? null, whType ?? "STOCK"]
   );
   return NextResponse.json({ success: true });
 }