fix(WEB): 수주/작업지시 담당자 표시 누락 수정

- transformApiToFrontend: options.manager_name 우선 참조 (폴백: client.manager_name)
- transformFrontendToApi: options에 manager_name 전송 추가
- 작업지시 상세: salesOrderWriter에 options.manager_name 우선 표시

src/components/orders/actions.ts

@@ -543,7 +543,7 @@ function transformApiToFrontend(apiData: ApiOrder): Order {
     receiverPlace: apiData.options?.receiver_contact ?? undefined,
     frameCount: apiData.root_nodes_sum_quantity ?? apiData.quantity ?? undefined,
     // 상세 페이지용 추가 필드 (API에서 매핑)
-    manager: apiData.client?.manager_name ?? undefined,
+    manager: apiData.options?.manager_name ?? apiData.client?.manager_name ?? undefined,
     contact: apiData.client_contact ?? apiData.client?.phone ?? undefined,
     deliveryRequestDate: apiData.delivery_date ?? undefined, // delivery_date를 공유
     // options JSON에서 추출
@@ -652,6 +652,7 @@ function transformFrontendToApi(data: OrderFormData | Record<string, unknown>):
       receiver_contact: formData.receiverContact || null,
       shipping_address: formData.address || null,
       shipping_address_detail: formData.addressDetail || null,
+      manager_name: formData.manager || null,
     },
     items: items.map((item) => {
       // Handle both form's OrderItem (id, spec) and API's OrderItemFormData (itemId, specification)