ui 수정 및 시현할 기능 업데이트

frontend/components/dataflow/external-call/RestApiSettings.tsx

@@ -272,7 +272,7 @@ const RestApiSettings: React.FC<RestApiSettingsProps> = ({ settings, onSettingsC
                   value={settings.apiUrl}
                   onChange={(e) => handleUrlChange(e.target.value)}
                   disabled={readonly}
-                  className={validationErrors.some((e) => e.includes("URL")) ? "border-red-500" : ""}
+                  className={validationErrors.some((e) => e.includes("URL")) ? "border-destructive" : ""}
                 />
                 <div className="text-muted-foreground text-xs">호출할 API의 전체 URL을 입력하세요.</div>
               </div>