feat: 거래명세표 캡쳐 시 현재고 숨김 + 로그인 유지(30일) 체크박스

[현재고 — 캡처/공유 시에만 숨김]
- 거래처에 보낼 이미지에서 내부 정보(현재고)가 보이면 안 됨
- 거래명세표 표의 현재고 th/td 와 재고 부족 경고 박스에 .js-no-export 클래스 추가
- captureAndShare 안에서 toPng 직전 임시로 display:none → 캡처 후 복원
- 화면에서는 그대로 보이고, 다운받은 PNG/공유 이미지에서만 빠짐

[로그인 유지 — 30일 세션]
- /api/auth/login 요청 body 에 remember 추가
- /lib/session.ts createSession(user, remember=false) — 24시간(기본) / 30일(remember=true)
- 로그인 폼에 [✓ 로그인 유지 (30일)] 체크박스 (기본 ON, 나이 많은 사용자 친화)
- 체크 해제하면 24시간 세션 유지 (기존 동작)

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

src/app/(auth)/login/page.tsx

@@ -12,6 +12,7 @@ export default function LoginPage() {
   const [password, setPassword] = useState("");
   const [showPw, setShowPw] = useState(false);
   const [loading, setLoading] = useState(false);
+  const [remember, setRemember] = useState(true); // 기본 ON
 
   const handleSubmit = async (e: FormEvent) => {
     e.preventDefault();
@@ -26,7 +27,7 @@ export default function LoginPage() {
       const res = await fetch("/api/auth/login", {
         method: "POST",
         headers: { "Content-Type": "application/json" },
-        body: JSON.stringify({ userId, password }),
+        body: JSON.stringify({ userId, password, remember }),
       });
 
       const data = await res.json();
@@ -175,6 +176,17 @@ export default function LoginPage() {
               </div>
             </div>
 
+            <label className="flex items-center gap-2.5 cursor-pointer select-none py-1">
+              <input
+                type="checkbox"
+                checked={remember}
+                onChange={(e) => setRemember(e.target.checked)}
+                className="w-5 h-5 accent-emerald-600 cursor-pointer"
+              />
+              <span className="text-sm text-slate-700 font-semibold">로그인 유지 (30일)</span>
+              <span className="text-xs text-slate-400 ml-auto">매번 다시 로그인 안 해도 돼요</span>
+            </label>
+
             <button
               type="submit"
               disabled={loading}

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

@@ -349,10 +349,20 @@ function StatementPreview({
     try {
       const mod = await import("html-to-image");
       if (!statementRef.current) return;
-      const dataUrl = await mod.toPng(statementRef.current, {
-        backgroundColor: "#ffffff",
-        pixelRatio: 2,
-      });
+      // 거래처에 보낼 이미지에서 "현재고"는 내부 정보라 숨긴다.
+      const hideEls = statementRef.current.querySelectorAll<HTMLElement>(".js-no-export");
+      const prev: { el: HTMLElement; display: string }[] = [];
+      hideEls.forEach((el) => { prev.push({ el, display: el.style.display }); el.style.display = "none"; });
+      let dataUrl: string;
+      try {
+        dataUrl = await mod.toPng(statementRef.current, {
+          backgroundColor: "#ffffff",
+          pixelRatio: 2,
+        });
+      } finally {
+        // 복원
+        prev.forEach((p) => { p.el.style.display = p.display; });
+      }
       const blob = await (await fetch(dataUrl)).blob();
       const file = new File([blob], `${order.ORDER_NO}_거래명세표.png`, { type: "image/png" });
       // Web Share API (모바일/지원 브라우저) → 카카오톡/메신저 등으로 공유
@@ -487,7 +497,7 @@ function StatementPreview({
       </div>
 
       {lowStock.length > 0 && (
-        <div className="border border-rose-200 bg-rose-50 rounded p-2 text-[11px] text-rose-700 flex items-start gap-2">
+        <div className="border border-rose-200 bg-rose-50 rounded p-2 text-[11px] text-rose-700 flex items-start gap-2 js-no-export">
           <AlertCircle size={14} className="mt-0.5 flex-shrink-0" />
           <div>
             <b>재고 부족 {lowStock.length}건</b> — 출고 시 거부됩니다:
@@ -526,7 +536,7 @@ function StatementPreview({
             <th className="border border-slate-300 px-1.5 py-1.5 w-8">#</th>
             <th className="border border-slate-300 px-1.5 py-1.5 text-left">품명</th>
             <th className="border border-slate-300 px-1.5 py-1.5 w-12">구분</th>
-            <th className="border border-slate-300 px-1.5 py-1.5 w-14">현재고</th>
+            <th className="border border-slate-300 px-1.5 py-1.5 w-14 js-no-export">현재고</th>
             <th className="border border-slate-300 px-1.5 py-1.5 w-14">수량</th>
             <th className="border border-slate-300 px-1.5 py-1.5 w-20">단가</th>
             <th className="border border-slate-300 px-1.5 py-1.5">공급가</th>
@@ -568,7 +578,7 @@ function StatementPreview({
                 <td className={`border border-slate-300 px-1.5 py-1 text-center ${it.IS_TAX_FREE === "Y" ? "text-violet-700" : "text-rose-700"}`}>
                   {it.IS_TAX_FREE === "Y" ? "면세" : "과세"}
                 </td>
-                <td className={`border border-slate-300 px-1.5 py-1 text-right ${lack ? "text-rose-700 font-bold" : "text-slate-600"}`}>
+                <td className={`border border-slate-300 px-1.5 py-1 text-right js-no-export ${lack ? "text-rose-700 font-bold" : "text-slate-600"}`}>
                   {isExtra ? "-" : fmt(it.STOCK_QTY)}
                 </td>
                 <td className="border border-slate-300 px-1.5 py-1 text-right">{fmt(it.QTY)}</td>
@@ -671,7 +681,7 @@ function ExtraRow({ line, displaySeq, editable, onSave, onDelete, onSaveRemark }
         />
       </td>
       <td className="border border-slate-300 px-1.5 py-1 text-center text-rose-700">과세</td>
-      <td className="border border-slate-300 px-1.5 py-1 text-right text-slate-400">-</td>
+      <td className="border border-slate-300 px-1.5 py-1 text-right text-slate-400 js-no-export">-</td>
       <td className="border border-slate-300 px-1 py-1 text-right">
         <input type="number" min={1} value={qty}
           onChange={(e) => setQty(Number(e.target.value))}

src/app/api/auth/login/route.ts

@@ -6,7 +6,8 @@ import type { User } from "@/types";
 
 export async function POST(request: NextRequest) {
   const body = await request.json();
-  const { userId, password } = body;
+  const { userId, password, remember } = body as { userId?: string; password?: string; remember?: boolean };
+  const keepLoggedIn = !!remember;
 
   if (!userId || !password) {
     return NextResponse.json(
@@ -26,7 +27,7 @@ export async function POST(request: NextRequest) {
     const momo = await verifyMomoCredentials(userId, password);
     if (momo.success && momo.user) {
       const sessionUser: User = momoToSessionUser(momo.user);
-      await createSession(sessionUser);
+      await createSession(sessionUser, keepLoggedIn);
       return NextResponse.json({ success: true, user: sessionUser, redirectTo: landingFor(sessionUser) });
     }
     // MOMO 실패 시 FITO 폴백 시도 (관리자 마이그레이션 케이스)
@@ -34,7 +35,7 @@ export async function POST(request: NextRequest) {
 
   const fito = await verifyCredentials(userId, password);
   if (fito.success && fito.user) {
-    await createSession(fito.user);
+    await createSession(fito.user, keepLoggedIn);
     return NextResponse.json({ success: true, user: fito.user, redirectTo: landingFor(fito.user) });
   }
 
@@ -43,7 +44,7 @@ export async function POST(request: NextRequest) {
     const momo = await verifyMomoCredentials(userId, password);
     if (momo.success && momo.user) {
       const sessionUser: User = momoToSessionUser(momo.user);
-      await createSession(sessionUser);
+      await createSession(sessionUser, keepLoggedIn);
       return NextResponse.json({ success: true, user: sessionUser, redirectTo: landingFor(sessionUser) });
     }
   }

src/lib/session.ts

@@ -7,13 +7,15 @@ const SECRET = new TextEncoder().encode(
 );
 
 const SESSION_COOKIE = "plm-session";
-const SESSION_DURATION = 24 * 60 * 60; // 24시간 (기존 1440분과 동일)
+const SESSION_DURATION_DEFAULT = 24 * 60 * 60;       // 24시간 (기본)
+const SESSION_DURATION_REMEMBER = 30 * 24 * 60 * 60; // 30일 (로그인 유지)
 
-export async function createSession(user: User): Promise<string> {
+export async function createSession(user: User, remember = false): Promise<string> {
+  const duration = remember ? SESSION_DURATION_REMEMBER : SESSION_DURATION_DEFAULT;
   const token = await new SignJWT({ user })
     .setProtectedHeader({ alg: "HS256" })
     .setIssuedAt()
-    .setExpirationTime(`${SESSION_DURATION}s`)
+    .setExpirationTime(`${duration}s`)
     .sign(SECRET);
 
   const cookieStore = await cookies();
@@ -21,7 +23,7 @@ export async function createSession(user: User): Promise<string> {
     httpOnly: true,
     secure: process.env.NODE_ENV === "production",
     sameSite: "lax",
-    maxAge: SESSION_DURATION,
+    maxAge: duration,
     path: "/",
   });