fix: [shipment] 배차 상세/수정 기본정보 그리드 레이아웃 개선 (1열→2x4열)

src/components/outbound/ShipmentManagement/ShipmentDetail.tsx

@@ -328,7 +328,7 @@ export function ShipmentDetail({ id }: ShipmentDetailProps) {
             <CardTitle className="text-base">기본 정보</CardTitle>
           </CardHeader>
           <CardContent>
-            <div className="grid grid-cols-1 gap-4">
+            <div className="grid grid-cols-2 md:grid-cols-4 gap-6">
               {renderInfoField('로트번호', detail.lotNo)}
               {renderInfoField('현장명', detail.siteName)}
               {renderInfoField('수주처', detail.customerName)}

src/components/outbound/ShipmentManagement/ShipmentEdit.tsx

@@ -391,7 +391,7 @@ export function ShipmentEdit({ id }: ShipmentEditProps) {
             <CardTitle className="text-base">기본 정보</CardTitle>
           </CardHeader>
           <CardContent>
-            <div className="grid grid-cols-1 gap-4">
+            <div className="grid grid-cols-2 md:grid-cols-4 gap-6">
               <div className="space-y-1">
                 <Label className="text-muted-foreground">로트번호</Label>
                 <div className="font-medium">{detail.lotNo}</div>