fix: [수주서] 이미지 프록시 경유로 변경 — 인증 문제 해결

- image_url → image_file_id로 변경
- /api/proxy/files/{id}/view 경유하여 인증 헤더 자동 포함

src/components/orders/documents/SalesOrderDocument.tsx

@@ -27,7 +27,7 @@ interface BendingItem {
   name: string;
   spec: string;
   qty: number;
-  image_url?: string | null;
+  image_file_id?: number | null;
 }
 
 interface BendingGroup {
@@ -95,11 +95,11 @@ const tdBase = 'border-r border-gray-300 px-1 py-1';
 const tdCenter = `${tdBase} text-center`;
 const imgPlaceholder = 'flex items-center justify-center border border-dashed border-gray-300 text-gray-400';
 
-/** 절곡품 이미지 렌더링 — image_url 있으면 실제 이미지, 없으면 placeholder */
+/** 절곡품 이미지 렌더링 — image_file_id 있으면 프록시 경유 실제 이미지, 없으면 placeholder */
 function BendingImage({ items, height = 'h-20' }: { items: BendingItem[]; height?: string }) {
-  const imageUrl = items.find(i => i.image_url)?.image_url;
-  if (imageUrl) {
-    return <img src={imageUrl} alt="" className={`${height} w-full object-contain`} />;
+  const fileId = items.find(i => i.image_file_id)?.image_file_id;
+  if (fileId) {
+    return <img src={`/api/proxy/files/${fileId}/view`} alt="" className={`${height} w-full object-contain`} />;
   }
   return <div className={`${imgPlaceholder} ${height} w-full`}>IMG</div>;
 }