[VisualStylesMode: Net11] CheckBox glyph and Button border rendering appears blurry in VisualStylesMode.Net11

[Amy-Li03]

.NET version

.NET 11.0.100-preview.7.26365.114 + Private dlls built from Net11/Integration-2 branch of https://github.com/KlausLoeffelmann/winforms repo

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

Not support, new feature

Issue description

When a CheckBox control is configured with: checkBox1.FlatStyle = FlatStyle.Popup;, Form's VisualStylesMode is set as VisualStylesMode.Net11,
the checkbox glyph (the square check box indicator) appears blurry, overly bold, or visually unclear.
Compared to the rendering in other visual style modes, the glyph loses sharpness and appears thicker than expected, resulting in a degraded visual appearance.
Also, button border has the similar issue.

Steps to reproduce

1. Create a WinForms application targeting .NET 11 Preview
2. Configure Form's VisualStylesMode = VisualStylesMode.Net11
3. Add a CheckBox control to a form, and set checkBox1.FlatStyle = FlatStyle.Popup
4. Run the application

[KlausLoeffelmann]

We should take a look into that.
Let's collect those styling things and aim for RC to fix those.