feat(orders): 출고 처리 기본 날짜 한 달 전 ~ 오늘로 변경

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

@@ -51,17 +51,22 @@ const todayStr = () => {
   const d = new Date();
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
 };
+const oneMonthAgoStr = () => {
+  const d = new Date();
+  d.setMonth(d.getMonth() - 1);
+  return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, "0")}-${String(d.getDate()).padStart(2, "0")}`;
+};
 
 export default function AdminOrdersPage() {
   const [orders, setOrders] = useState<Order[]>([]);
   // URL 쿼리 우선: dateFrom/dateTo 키가 있으면 그 값 사용 (빈 문자열도 명시적 = 전체 기간).
-  // 키가 없을 때만 기본값(오늘 ~ 오늘)
+  // 키가 없을 때 기본값 — 한 달 전 ~ 오늘
   const initial = (() => {
-    if (typeof window === "undefined") return { status: "", dateFrom: todayStr(), dateTo: todayStr(), keyword: "" };
+    if (typeof window === "undefined") return { status: "", dateFrom: oneMonthAgoStr(), dateTo: todayStr(), keyword: "" };
     const q = new URLSearchParams(window.location.search);
     return {
       status: q.get("status") ?? "",
-      dateFrom: q.has("dateFrom") ? (q.get("dateFrom") ?? "") : todayStr(),
+      dateFrom: q.has("dateFrom") ? (q.get("dateFrom") ?? "") : oneMonthAgoStr(),
       dateTo: q.has("dateTo") ? (q.get("dateTo") ?? "") : todayStr(),
       keyword: q.get("keyword") ?? "",
     };
@@ -271,8 +276,8 @@ export default function AdminOrdersPage() {
             className="h-8 sm:h-9 px-3 rounded bg-slate-800 text-white text-xs sm:text-sm font-bold hover:bg-slate-900 disabled:opacity-50">
             조회
           </button>
-          {(dateFrom !== todayStr() || dateTo !== todayStr() || status || keyword) && (
-            <button onClick={() => { setDateFrom(todayStr()); setDateTo(todayStr()); setStatus(""); setKeyword(""); }}
+          {(dateFrom !== oneMonthAgoStr() || dateTo !== todayStr() || status || keyword) && (
+            <button onClick={() => { setDateFrom(oneMonthAgoStr()); setDateTo(todayStr()); setStatus(""); setKeyword(""); }}
               className="h-8 sm:h-9 px-2 rounded border border-slate-200 bg-white text-slate-600 text-[11px]">
               초기화
             </button>