Mac client 6.1.2 update

A new English voice reading synthesis engine, with more sounds and more natural reading effects. If you regularly listen to articles in English, make sure the app language is set to English. Read aloud FAQ: 随时随地，听文章
Optimized the reading rhythm with special styles such as paragraph breaks, links, and boldening;
Optimized the estimation algorithm for the total listening time when reading aloud in different languages;
Fixed an issue where the reading progress bar could sometimes not be dragged;
Fixed an abnormal display in the player's interface;
Fine-tuned the widget font size on the lock screen;
Fixed a situation where the Mac search box appeared abnormally and couldn't be clicked.