[New Features]

• Added a new blending mode "Flat" for brushes, suitable for layering over different colors with either uniform opacity or smoothly graded opacity.

 [Fixed Bugs and Problems]

• Fixed a bug where, when the brush blending mode was set to Opacity and the brush type was set to Water, colors would appear too dark when the wetness parameter was high.
• Fixed an issue where the app would crash if you use a locked brush with "Bézier Curve" or "Polyline" drawing tools, select "Use for Free" in the alert box displayed and then try to use another drawing tool.
• (Android) Fixed a bug on some devices where dynamic changes such as pressure and speed were not reflected after touch-up when dynamic parameters and the blending mode "Opacity" were set.
• (Android) Fixed a bug on some devices where, during brush drawing, if the brush blending mode is set to "Opacity" and "Texture" is enabled, drawing with a thickness of 48 px or more using any brush type other than "Double" would result in abnormal rendering during dragging before lifting the touch or stylus.