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TitleBar area cannot be resized in 4.x #1414

@FastChen

Description

@FastChen

Describe the bug

ui:TitleBar will hinder the drag of Window size

To Reproduce

The sample also has the same problem test on: Wpf.Ui.Demo.Simple

use base TitleBar like this:

        <ui:TitleBar
            Title="WPF UI - Simple Demo"
            Grid.Row="0"
            Icon="pack://application:,,,/Assets/applicationIcon-256.png" />

Expected behavior

Normal behavior of a Window resize

Screenshots

Img:

Image

Video:

2025-04-15.202837.mp4

OS version

Windows11 24H2

.NET version

Test NET: 8/9

WPF-UI NuGet version

Version: nuget 4.0.2-4.x

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No response

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