{"success":true,"url":"https://luccool.eu","favicon":"https://luccool.eu/favicon.ico","size":"32x32","source":"direct","cached":true,"cachedAt":"2026-08-10T11:27:17.822Z","cacheSource":"kv","error":"图片下载失败，已回退到JSON格式: Empty image response","imageDownloadFailed":true}