说明
新增：删除订阅源时可以全选和取消全选优化：优化了链接在应用内打开的方式修复：OPML 文件解析错误（感谢用户 Feng 的反馈）
What's new
feat: Select and deselect all when deleting feedsoptimize: Optimized the way links are opened within the appfix: OPML file parsing error (thanks to user Feng for the feedback)