fix(WEB): 수주 등록/수정 옵션 필드 저장 및 담당자 표시 문제 해결

- FormRequest에 options 필드 validation 추가 (StoreOrderRequest, UpdateOrderRequest)
  - shipping_cost_code, receiver, receiver_contact, shipping_address 등
- OrderService.show()에서 client 로드 시 manager_name 필드 추가
- 수주확정/생산지시 되돌리기 기능 추가 (revertOrderConfirmation, revertProductionOrder)
- 견적 calculation_inputs 포함하여 로드

Co-Authored-By: Claude <noreply@anthropic.com>

app/Services/OrderService.php

@@ -118,9 +118,9 @@ public function show(int $id)
 
         $order = Order::where('tenant_id', $tenantId)
             ->with([
-                'client:id,name,contact_person,phone,email',
+                'client:id,name,contact_person,phone,email,manager_name',
                 'items' => fn ($q) => $q->orderBy('sort_order'),
-                'quote:id,quote_number,site_name',
+                'quote:id,quote_number,site_name,calculation_inputs',
             ])
             ->find($id);
 
@@ -518,4 +518,101 @@ private function generateWorkOrderNo(int $tenantId): string
 
         return sprintf('%s%s%04d', $prefix, $date, $seq);
     }
+
+    /**
+     * 수주확정 되돌리기 (수주등록 상태로 변경)
+     */
+    public function revertOrderConfirmation(int $orderId): array
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        // 수주 조회
+        $order = Order::where('tenant_id', $tenantId)
+            ->find($orderId);
+
+        if (! $order) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        // 수주확정 상태에서만 되돌리기 가능
+        if ($order->status_code !== Order::STATUS_CONFIRMED) {
+            throw new BadRequestHttpException(__('error.order.cannot_revert_not_confirmed'));
+        }
+
+        // 상태 변경
+        $previousStatus = $order->status_code;
+        $order->status_code = Order::STATUS_DRAFT;
+        $order->updated_by = $userId;
+        $order->save();
+
+        return [
+            'order' => $order->load(['client:id,name', 'items']),
+            'previous_status' => $previousStatus,
+        ];
+    }
+
+    /**
+     * 생산지시 되돌리기 (작업지시 및 관련 데이터 삭제)
+     */
+    public function revertProductionOrder(int $orderId): array
+    {
+        $tenantId = $this->tenantId();
+        $userId = $this->apiUserId();
+
+        // 수주 조회
+        $order = Order::where('tenant_id', $tenantId)
+            ->find($orderId);
+
+        if (! $order) {
+            throw new NotFoundHttpException(__('error.not_found'));
+        }
+
+        // 완료된 수주는 되돌리기 불가
+        if ($order->status_code === Order::STATUS_COMPLETED) {
+            throw new BadRequestHttpException(__('error.order.cannot_revert_completed'));
+        }
+
+        return DB::transaction(function () use ($order, $tenantId, $userId) {
+            // 관련 작업지시 ID 조회
+            $workOrderIds = WorkOrder::where('tenant_id', $tenantId)
+                ->where('sales_order_id', $order->id)
+                ->pluck('id')
+                ->toArray();
+
+            $deletedCounts = [
+                'work_results' => 0,
+                'work_order_items' => 0,
+                'work_orders' => 0,
+            ];
+
+            if (count($workOrderIds) > 0) {
+                // 1. 작업결과 삭제
+                $deletedCounts['work_results'] = DB::table('work_results')
+                    ->whereIn('work_order_id', $workOrderIds)
+                    ->delete();
+
+                // 2. 작업지시 품목 삭제
+                $deletedCounts['work_order_items'] = DB::table('work_order_items')
+                    ->whereIn('work_order_id', $workOrderIds)
+                    ->delete();
+
+                // 3. 작업지시 삭제
+                $deletedCounts['work_orders'] = WorkOrder::whereIn('id', $workOrderIds)
+                    ->delete();
+            }
+
+            // 4. 수주 상태를 CONFIRMED로 되돌리기
+            $previousStatus = $order->status_code;
+            $order->status_code = Order::STATUS_CONFIRMED;
+            $order->updated_by = $userId;
+            $order->save();
+
+            return [
+                'order' => $order->load(['client:id,name', 'items']),
+                'deleted_counts' => $deletedCounts,
+                'previous_status' => $previousStatus,
+            ];
+        });
+    }
 }