YZWater3/src/YZWater.Avalonia/Views/MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:YZWater.Core.ViewModels"
        xmlns:views="using:YZWater.Avalonia.Views"
        xmlns:conv="using:YZWater.Avalonia.Converters"
        xmlns:th="using:YZWater.Avalonia.Controls"
        x:Class="YZWater.Avalonia.Views.MainWindow"
        x:DataType="vm:MainViewModel"
        Title="{Binding Title}"
        Width="1280" Height="800"
        MinWidth="1024" MinHeight="700"
        WindowStartupLocation="CenterScreen"
        Background="{DynamicResource AppBgBrush}">

    <Window.DataContext>
        <vm:MainViewModel/>
    </Window.DataContext>

    <DockPanel>
        <!-- ═══ 底部导航栏 ═══ -->
        <Border x:Name="NavBar" DockPanel.Dock="Bottom" Background="{DynamicResource NavBgBrush}"
                BorderBrush="{DynamicResource BorderBrush}" BorderThickness="0,1,0,0" Padding="4,0">
            <Grid ColumnDefinitions="*,Auto,Auto">
                <!-- 导航按钮 -->
                <StackPanel Grid.Column="0" Orientation="Horizontal" HorizontalAlignment="Center" Spacing="0">
                    <Button Command="{Binding ShowViewACommand}" Padding="20,8" BorderThickness="0" Background="Transparent">
                        <StackPanel Orientation="Horizontal" Spacing="6">
                            <Border Width="3" Height="14" CornerRadius="1"
                                    Background="{Binding IsTabAActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                            <TextBlock Text="{Binding NavProcess}" FontFamily="Consolas, monospace" FontSize="11"
                                       FontWeight="{Binding IsTabAActive, Converter={x:Static conv:BoolConverters.ToFontWeight}}"
                                       Foreground="{Binding IsTabAActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                        </StackPanel>
                    </Button>
                    <Border Background="{DynamicResource BorderBrush}" Width="1" Height="20" VerticalAlignment="Center"/>
                    <Button Command="{Binding ShowViewBCommand}" Padding="20,8" BorderThickness="0" Background="Transparent">
                        <StackPanel Orientation="Horizontal" Spacing="6">
                            <Border Width="3" Height="14" CornerRadius="1"
                                    Background="{Binding IsTabBActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                            <TextBlock Text="{Binding NavParams}" FontFamily="Consolas, monospace" FontSize="11"
                                       FontWeight="{Binding IsTabBActive, Converter={x:Static conv:BoolConverters.ToFontWeight}}"
                                       Foreground="{Binding IsTabBActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                        </StackPanel>
                    </Button>
                    <Border Background="{DynamicResource BorderBrush}" Width="1" Height="20" VerticalAlignment="Center"/>
                    <Button Command="{Binding ShowViewCCommand}" Padding="20,8" BorderThickness="0" Background="Transparent">
                        <StackPanel Orientation="Horizontal" Spacing="6">
                            <Border Width="3" Height="14" CornerRadius="1"
                                    Background="{Binding IsTabCActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                            <TextBlock Text="{Binding NavFlow}" FontFamily="Consolas, monospace" FontSize="11"
                                       FontWeight="{Binding IsTabCActive, Converter={x:Static conv:BoolConverters.ToFontWeight}}"
                                       Foreground="{Binding IsTabCActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                        </StackPanel>
                    </Button>
                    <Border Background="{DynamicResource BorderBrush}" Width="1" Height="20" VerticalAlignment="Center"/>
                    <Button Command="{Binding ShowViewDCommand}" Padding="20,8" BorderThickness="0" Background="Transparent">
                        <StackPanel Orientation="Horizontal" Spacing="6">
                            <Border Width="3" Height="14" CornerRadius="1"
                                    Background="{Binding IsTabDActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                            <TextBlock Text="{Binding NavAlarm}" FontFamily="Consolas, monospace" FontSize="11"
                                       FontWeight="{Binding IsTabDActive, Converter={x:Static conv:BoolConverters.ToFontWeight}}"
                                       Foreground="{Binding IsTabDActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                        </StackPanel>
                    </Button>
                    <Border Background="{DynamicResource BorderBrush}" Width="1" Height="20" VerticalAlignment="Center"/>
                    <Button Command="{Binding ShowViewECommand}" Padding="20,8" BorderThickness="0" Background="Transparent">
                        <StackPanel Orientation="Horizontal" Spacing="6">
                            <Border Width="3" Height="14" CornerRadius="1"
                                    Background="{Binding IsTabEActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                            <TextBlock Text="{Binding NavAbout}" FontFamily="Consolas, monospace" FontSize="11"
                                       FontWeight="{Binding IsTabEActive, Converter={x:Static conv:BoolConverters.ToFontWeight}}"
                                       Foreground="{Binding IsTabEActive, Converter={x:Static conv:BoolConverters.ToBrush}}"/>
                        </StackPanel>
                    </Button>
                </StackPanel>

                <!-- 主题切换 -->
                <Button Grid.Column="1" Command="{Binding ToggleThemeCommand}" Classes="btn-toggle" Margin="8,0">
                    <StackPanel Orientation="Horizontal" Spacing="6">
                        <TextBlock Text="{Binding ThemeIcon}" FontSize="14" VerticalAlignment="Center"/>
                        <TextBlock Text="THEME" FontSize="10" VerticalAlignment="Center"
                                   Foreground="{DynamicResource TextSecondaryBrush}"/>
                    </StackPanel>
                </Button>

                <!-- 语言切换 -->
                <Button Grid.Column="2" Command="{Binding ToggleLanguageCommand}" Classes="btn-toggle" Margin="0,0,8,0">
                    <StackPanel Orientation="Horizontal" Spacing="6">
                        <TextBlock Text="{Binding LangIcon}" FontSize="12" FontWeight="Bold" VerticalAlignment="Center"/>
                        <TextBlock Text="LANG" FontSize="10" VerticalAlignment="Center"
                                   Foreground="{DynamicResource TextSecondaryBrush}"/>
                    </StackPanel>
                </Button>
            </Grid>
        </Border>

        <!-- ═══ 主内容区域 ═══ -->
        <TabControl SelectedIndex="{Binding SelectedTabIndex}" Background="{DynamicResource AppBgBrush}">
            <TabItem Header="PROCESS" IsVisible="False">
                <views:ViewAView/>
            </TabItem>
            <TabItem Header="PARAMS" IsVisible="False">
                <views:ViewBView/>
            </TabItem>
            <TabItem Header="FLOW" IsVisible="False">
                <views:ViewCView/>
            </TabItem>
            <TabItem Header="ALARM" IsVisible="False">
                <views:ViewDView/>
            </TabItem>
            <TabItem Header="ABOUT" IsVisible="False">
                <views:ViewEView/>
            </TabItem>
        </TabControl>
    </DockPanel>
</Window>