fix: Remove car_id property from adminAddVehicle call to fix TypeScript error

frontend/src/app/admin/cars/page.tsx

@@ -1119,7 +1119,6 @@ export default function CarsAdminPage() {
           const mainImage = car.images?.find((img) => img.is_main)?.url || car.images?.[0]?.url;
           await vehicleRequestsApi.adminAddVehicle(parseInt(requestId), {
             request_id: parseInt(requestId),
-            car_id: car.id,  // 이미 로컬 DB에 있는 차량이므로 car_id 사용
             car_data: {
               id: car.id.toString(),
               car_name: car.car_name,