[DarkMode]: TabControl doesn't render tab titles correctly when SizeMode = Fixed

[peymanr34]

.NET version

10.0.100-rc.1.25451.107

Did it work in .NET Framework?

No

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

N/A

Issue description

When dark mode is enabled, the tab page titles doesn't render correctly when TabControl.SizeMode = Fixed:

If you minimize or resize the window, it will be displayed correctly (if TabControl.Dock = Fill):

In classic mode works as expected:

And since TabControl didn't support Dark Mode in .NET 9, works as expected:

Steps to reproduce

1. Create a new Windows Forms App
2. Set the dark mode in Program.cs

Application.SetColorMode(SystemColorMode.Dark);

3. Add a new TabControl to the Form1
4. Set tabControl1.SizeMode to Fixed via the Designer.
5. Set tabControl1.Dock to Fill via the Designer (optional).

[Zheng-Li01]

If not setting the tabControl1.Dock to Fill, the issue will persist indefinitely and cannot be resolved with minimize or resize the window.

https://github.com/user-attachments/assets/668bdbff-7f71-4093-9eb4-186d5f6d26df

[LeafShi1]

This issue is introduced by commit 57fd18b.

[merriemcgaw]

@KlausLoeffelmann getting this one on your radar too.