fix: Correct variable name from searchResults to cars

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

@@ -686,7 +686,7 @@ export default function CarsAdminPage() {
     setImporting(true);
     try {
       // 선택된 차량들의 상세 정보를 올바른 형식으로 변환
-      const selectedCarsList = searchResults.filter(car => selectedCars.has(car.id));
+      const selectedCarsList = cars.filter(car => selectedCars.has(car.id));
       const carsToImport = selectedCarsList.map(car => ({
         car_no: car.id,
         car_name: car.car_name || '',