TitleBar Title does not respect FontSize property

Describe the bug

Setting the FontFamily, FontSize and FontWeight properties of the TitleBar has no effect on the Title displayed.

To Reproduce

<ui:FluentWindow ...>
<ui:TitleBar FontFamily="Times New Roman" FontWeight="Bold" FontSize="24" Title="Window title"/>
</ui:FluentWindow>

Expected behavior

The Title displayed would reflect the FontFamily, FontSize and FontWeight properties set on the TitleBar.

Screenshots

No response

OS version

Win 11

.NET version

Net 8.0

WPF-UI NuGet version

3.0.0

Additional context

Before Version 3.0 I could get round this limitation by defining my own content in TitleBar.Header. Now anything put in the TitleBar.Header appears aligned to the very right of the window, so this no longer works. TitleBar cannot be simply retemplated to do the right thing because TitleBarButton, a required component of the TitleBar, has (unnecessarily?) "internal" scope and cannot therefore be used in a style in my project.

Thanks for your work on the project.

Start by tracing the TitleBar control and its template, focusing on how the displayed Title receives FontFamily, FontSize, and FontWeight. Reproduce the issue with the WPF-UI 3.0.0 example from the report, then verify that the displayed title reflects those properties without breaking TitleBar.Header alignment or required TitleBarButton behavior.