fix: update ItemRoutingComponent dialog width for better responsiveness

- Changed the maximum width of the add item dialog to be more flexible, allowing it to utilize the full width of the viewport while respecting the configured maximum width.
- This adjustment aims to enhance the user experience by ensuring the dialog is appropriately sized across different screen sizes.

frontend/lib/registry/components/v2-item-routing/ItemRoutingComponent.tsx

@@ -458,7 +458,7 @@ export function ItemRoutingComponent({
 
       {/* ════ 품목 추가 다이얼로그 (테이블 형태 + 검색) ════ */}
       <Dialog open={addDialogOpen} onOpenChange={setAddDialogOpen}>
-        <DialogContent className="max-w-[95vw]" style={{ maxWidth: `min(95vw, ${config.addModalMaxWidth || "600px"})` }}>
+        <DialogContent className="!max-w-none" style={{ width: `min(100%, 95vw, ${config.addModalMaxWidth || "600px"})` }}>
           <DialogHeader>
             <DialogTitle className="text-base sm:text-lg">품목 추가</DialogTitle>
             <DialogDescription className="text-xs sm:text-sm">