bleatingsheep

Hi, there have been many updates since I submitted this pull request. Feel free to let me know if there is anything else I can do (e.g., rebasing, solving conflicts)....

Update: I find that the service worker won't use new content **until the browser has been restarted**. My browser is Edge 91.0.864.54.

是这么用的 ```C# Sisters.WudiLib.Posts.Message someMsgCtx = ... if (someMsgCtx is Sisters.WudiLib.Posts.GroupMessage g) { // g.GroupId... } ```

I also need OpenGL ES 3.1, Vulkan 1.0.3, and Vulkan level 0 to play Sky: Children of the Light. It would be very helpful if WSA add support.