X11 CSD:双击 ElementRole="TitleBar"不能最大化/恢复窗口

To Reproduce

1. Create a desktop Avalonia app (12.1.0 or current master).
2. Enable X11 drawn decorations:

AppBuilder.Configure<App>()
    .UsePlatformDetect()
    .With(new X11PlatformOptions
    {
        EnableDrawnDecorations = true,
    });

1. Use a window with extended client area and a title-bar role, for example:

<Window ExtendClientAreaToDecorationsHint="True">
    <Border Height="32"
            Background="SteelBlue"
            WindowDecorationProperties.ElementRole="TitleBar" />
</Window>

(Default WindowDrawnDecorations with PART_TitleBar / ElementRole="TitleBar" reproduces it as well.) 4. Run on Linux under X11 (not WSL/WSLg). 5. Restore the window to WindowState.Normal. 6. Double-click the title bar (not the maximize button). Avalonia version 12.1.0 (also present on current master in src/Avalonia.X11/X11Window.cs) OS Linux / Debian / X11 (reproduced with EnableDrawnDecorations CSD). Windows and macOS are fine. Expected behavior Double-click on the title bar while Normal → WindowState.Maximized Double-click while Maximized → WindowState.Normal Single-click + drag still moves the window This is how Win32 (HTCAPTION) and macOS (DoubleClickHelper in Avalonia.Native.WindowImpl.ChromeHitTest) already behave. Actual behavior The window is dragged (or a drag is initiated). WindowState does not change. Avalonia version 12.1.0 OS Linux Additional context Root cause: in X11Window.ScheduleInput, a LeftButtonDown on chrome TitleBar immediately sends _NET_WM_MOVERESIZE with direction _NET_WM_MOVERESIZE_MOVE and returns, without checking for a double-click:

// Chrome hit-test for drawn decorations
if (NeedsDrawnDecorations
    && mouse.Type == RawPointerEventType.LeftButtonDown
    && _inputRoot is { } inputRoot)
{
    var chromeRole = inputRoot.HitTestChromeElement(mouse.Position);
    if (chromeRole is { } role)
    {
        var moveResizeSide = role switch
        {
            WindowDecorationsElementRole.TitleBar => NetWmMoveResize._NET_WM_MOVERESIZE_MOVE,
            // ... resize edges ...
        };
        if (moveResizeSide.HasValue)
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