更新日志

1. Added Bézier pen tool & piecewise graphic support 2. Added draw polyline tool & spline graphic support 3. Added geometry combination & deformation features 4. Added grid snapping feature 5. Added experimental presentation feature 6. Optimized mutex selecting mechanism 7. Optimized client-side localization service 8. Optimized several framework UI controls 9. Fixed several known issues

1. Added document view 2. Optimized artwork viewer 3. Renovated color picker & brush picker 4. Fixed known issues

1. Added document view 2. Optimized artwork viewer 3. Renovated color picker & brush picker 4. Fixed known issues