BigBrotherHui

Results 2 issues of BigBrotherHui

## Summary when i add a closed curve(markup),then i drag random a point cross the other points,by doing this serval times,then the slicer application will crash,the memory of compute will...

When loading a PDF, if the document contains Chinese text, the highlighted area does not align correctly with the actual text when selecting it using the left mouse button. ![Image](https://github.com/user-attachments/assets/3de01b69-0d4d-451f-ab15-b1b6739bc728)