DreamPrism

**Describe the bug** when property `LegendPosition` of `SKCartesianChart` is set to `LegendPosition.Hidden`, the legend still appears **To Reproduce** Steps to reproduce the behavior: 1. Create a new `SKCartesianChart` with non-zero...

### Lagrange项目 Core ### 新需求内容 GroupExt中SetFriendRequest函数只用到了request.SourceUid，却要求传入FriendRequestEvent  希望能改为仅要求传入sourceUid