MainWindow.xaml

<Window x:Class="LSPDFRManager.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="LSPDFR Manager"
        Height="840" Width="1320"
        MinHeight="640" MinWidth="980"
        WindowStartupLocation="CenterScreen"
        Background="{StaticResource AppBackground}"
        FontFamily="Segoe UI">

    <Window.Resources>
        <LinearGradientBrush x:Key="ShellGlowAccent" StartPoint="0,0" EndPoint="1,0">
            <GradientStop Color="#002C6D" Offset="0"/>
            <GradientStop Color="#1A5DCC" Offset="0.5"/>
            <GradientStop Color="#2A8BFF" Offset="1"/>
        </LinearGradientBrush>
    </Window.Resources>

    <Grid x:Name="RootGrid">
        <Grid.LayoutTransform>
            <ScaleTransform x:Name="AppScaleTransform" ScaleX="1" ScaleY="1"/>
        </Grid.LayoutTransform>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="248"/>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>

        <Border Grid.Column="0" Style="{StaticResource ShellSidebar}">
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="Auto"/>
                    <RowDefinition Height="*"/>
                    <RowDefinition Height="Auto"/>
                </Grid.RowDefinitions>

                <!-- Logo area -->
                <Border Grid.Row="0" Margin="14,18,14,10" CornerRadius="12" Padding="14,12" BorderBrush="{StaticResource AccentBorder}" BorderThickness="1" Background="{StaticResource CardGradient}">
                    <StackPanel>
                        <StackPanel Orientation="Horizontal">
                            <TextBlock Text="LSPDFR" FontSize="18" FontWeight="Bold" Foreground="{StaticResource AccentPrimary}"/>
                            <TextBlock Text=" Manager" FontSize="18" FontWeight="Bold" Foreground="{StaticResource TextStrong}"/>
                        </StackPanel>
                        <TextBlock Text="{Binding AppVersionText}" Margin="0,4,0,0" Foreground="{StaticResource TextMuted}" FontSize="11"/>
                    </StackPanel>
                </Border>

                <!-- Nav buttons -->
                <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
                <StackPanel Margin="10,0,10,0">
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Home">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE80F;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Home" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsHomeActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Library">
                        <Button.Content>
                            <StackPanel Orientation="Horizontal">
                                <TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE8F1;" FontSize="14" Width="20" TextAlignment="Center"/>
                                <TextBlock Text="Library" FontSize="13" Margin="10,0,0,0"/>
                                <Border Background="#F59E0B" CornerRadius="8" Padding="5,1" Margin="8,0,0,0"
                                        Visibility="{Binding HasDisabledMods, Converter={StaticResource BoolToVis}, FallbackValue=Collapsed}">
                                    <TextBlock Text="{Binding DisabledModCount}" FontSize="10" FontWeight="Bold" Foreground="Black"/>
                                </Border>
                            </StackPanel>
                        </Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsLibraryActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Install">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE710;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Install" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsInstallActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Browse">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE721;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Browse" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsBrowseActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="PatrolReadiness">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE73E;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Patrol Ready" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsPatrolReadinessActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="SafeMode">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE8D7;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Safe Mode" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsSafeModeActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Cleanup">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE74D;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Cleanup" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsCleanupActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Diagnostics">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE9D9;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Diagnostics" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsDiagnosticsActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Profiles">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE748;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Profiles" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsProfilesActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Backups">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE777;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Backups" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsBackupsActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="History">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE81C;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="History" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsHistoryActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Logs">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE9F9;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Logs" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsLogViewerActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Settings">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE713;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Settings" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsSettingsActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="ModConfig">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE70F;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Mod Config" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsModConfigActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="Oiv">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE7EE;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="OIV Tools" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsOivActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="DevDiagnostics">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE756;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="Dev Diagnostics" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsDevDiagnosticsActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                    <Button Command="{Binding NavigateCommand}" CommandParameter="ReactPreview">
                        <Button.Content><StackPanel Orientation="Horizontal"><TextBlock FontFamily="Segoe MDL2 Assets" Text="&#xE774;" FontSize="14" Width="20" TextAlignment="Center"/><TextBlock Text="React UI" FontSize="13" Margin="10,0,0,0"/></StackPanel></Button.Content>
                        <Button.Style><Style TargetType="Button" BasedOn="{StaticResource NavButton}"><Style.Triggers><DataTrigger Binding="{Binding IsReactPreviewActive}" Value="True"><Setter Property="Background" Value="{StaticResource AccentActiveBg}"/><Setter Property="BorderBrush" Value="{StaticResource AccentBorder}"/><Setter Property="Foreground" Value="{StaticResource TextStrong}"/><Setter Property="FontWeight" Value="Bold"/></DataTrigger></Style.Triggers></Style></Button.Style>
                    </Button>
                </StackPanel>
                </ScrollViewer>

                <!-- Bottom status footer -->
                <Border Grid.Row="2" Margin="10,0,10,12" Padding="10,8" CornerRadius="8" Background="{StaticResource Surface}" BorderBrush="{StaticResource BorderSubtle}" BorderThickness="1">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <Ellipse Grid.Column="0" Width="8" Height="8" Margin="0,0,8,0" VerticalAlignment="Center" Fill="{StaticResource SuccessGreen}"/>
                        <TextBlock Grid.Column="1" Text="{Binding GtaStatusText}" FontSize="11" Foreground="{StaticResource TextMuted}" TextTrimming="CharacterEllipsis" VerticalAlignment="Center"/>
                    </Grid>
                </Border>
            </Grid>
        </Border>

        <Grid Grid.Column="1" Margin="16,16,16,16">
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="*"/>
            </Grid.RowDefinitions>

            <Border Grid.Row="0" Height="4" Margin="0,0,0,8" CornerRadius="2" Background="{StaticResource ShellGlowAccent}"/>

            <Border Grid.Row="0" Margin="0,8,0,10" Style="{StaticResource WarningBanner}" Visibility="{Binding HasGlobalError, Converter={StaticResource BoolToVis}}">
                <DockPanel>
                    <Button DockPanel.Dock="Right" Style="{StaticResource IconButton}" Content="✕" VerticalAlignment="Top" Margin="8,0,0,0" Click="DismissError_Click"/>
                    <TextBlock Text="{Binding GlobalErrorMessage}" Foreground="{StaticResource ErrorText}" FontSize="13" TextWrapping="Wrap" VerticalAlignment="Center"/>
                </DockPanel>
            </Border>

            <Border Grid.Row="1" Style="{StaticResource ShellContentPanel}">
                <ContentControl Content="{Binding CurrentView}"/>
            </Border>
        </Grid>
    </Grid>
</Window>