{"success":true,"url":"https://mail.qhc.dpdns.org","favicon":"https://mail.qhc.dpdns.org/assets/mail-CSokca-y.png","size":"32x32","source":"html","cached":true,"cachedAt":"2026-09-12T05:11:25.353Z","cacheSource":"kv","error":"图片下载失败，已回退到JSON格式: Failed to fetch image: 530","imageDownloadFailed":true}