Add host activity and DB browser, and keep dialogs, drag-drop, and idle maintenance responsive.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.App/HostActivityMonitorWindow.xaml

@@ -0,0 +1,130 @@
+<Window x:Class="Explorer.App.HostActivityMonitorWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:shell="clr-namespace:System.Windows.Shell;assembly=PresentationFramework"
+        Title="Host activity"
+        Icon="pack://application:,,,/Assets/explorer-workbench.ico"
+        Height="640" Width="960"
+        MinHeight="420" MinWidth="720"
+        WindowStartupLocation="CenterOwner"
+        WindowStyle="None"
+        ResizeMode="CanResize"
+        Background="{DynamicResource Bg}"
+        Foreground="{DynamicResource Fg}"
+        UseLayoutRounding="True"
+        SnapsToDevicePixels="True">
+  <shell:WindowChrome.WindowChrome>
+    <shell:WindowChrome CaptionHeight="40"
+                        ResizeBorderThickness="6"
+                        GlassFrameThickness="0"
+                        CornerRadius="0"
+                        UseAeroCaptionButtons="False"/>
+  </shell:WindowChrome.WindowChrome>
+  <DockPanel>
+    <Border DockPanel.Dock="Top" Height="40" Background="{DynamicResource Panel}"
+            BorderBrush="{DynamicResource Stroke}" BorderThickness="0,0,0,1"
+            MouseLeftButtonDown="OnTitleBarMouseDown">
+      <Grid>
+        <StackPanel Orientation="Horizontal" VerticalAlignment="Center" Margin="12,0,0,0" IsHitTestVisible="False">
+          <Image Width="20" Height="20" Margin="0,0,8,0" VerticalAlignment="Center"
+                 RenderOptions.BitmapScalingMode="HighQuality"
+                 Source="pack://application:,,,/Assets/explorer-workbench-20.png"/>
+          <TextBlock Text="Host activity" FontWeight="SemiBold" VerticalAlignment="Center"
+                     Foreground="{DynamicResource Fg}"/>
+        </StackPanel>
+        <StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
+          <Button Style="{StaticResource CaptionButton}" Content="─" Click="OnMinimize" ToolTip="Minimize"/>
+          <Button x:Name="MaxRestoreButton" Style="{StaticResource CaptionButton}" Content="☐"
+                  Click="OnMaxRestore" ToolTip="Maximize"/>
+          <Button Style="{StaticResource CaptionCloseButton}" Content="✕" Click="OnClose" ToolTip="Close"/>
+        </StackPanel>
+      </Grid>
+    </Border>
+
+    <DockPanel Margin="14">
+      <DockPanel DockPanel.Dock="Bottom" Margin="0,10,0,0">
+        <Button DockPanel.Dock="Right" Content="Close" MinWidth="88" Height="30" Click="OnClose" Margin="8,0,0,0"/>
+        <Button DockPanel.Dock="Right" Content="Run maintenance now" MinWidth="140" Height="30"
+                Command="{Binding RunMaintenanceNowCommand}" Margin="8,0,0,0"/>
+        <Button DockPanel.Dock="Right" Content="Refresh" MinWidth="88" Height="30"
+                Command="{Binding RefreshCommand}" Margin="8,0,0,0"/>
+        <TextBlock VerticalAlignment="Center" Foreground="{DynamicResource FgMuted}">
+          <Run Text="{Binding Status, Mode=OneWay}"/>
+          <Run Text="  ·  "/>
+          <Run Text="{Binding IsLive, Mode=OneWay, StringFormat=Live: {0}}"/>
+        </TextBlock>
+      </DockPanel>
+
+      <TextBlock DockPanel.Dock="Top" Text="{Binding Summary}" FontWeight="SemiBold" FontSize="15"
+                 TextWrapping="Wrap" Margin="0,0,0,10"/>
+
+      <UniformGrid DockPanel.Dock="Top" Rows="2" Columns="2" Margin="0,0,0,10">
+        <Border BorderBrush="{DynamicResource Stroke}" BorderThickness="1" Padding="10" Margin="0,0,6,6">
+          <StackPanel>
+            <TextBlock Text="Maintenance" Foreground="{DynamicResource FgMuted}" FontSize="11"/>
+            <TextBlock Text="{Binding MaintenanceText}" TextWrapping="Wrap" Margin="0,4,0,0"/>
+          </StackPanel>
+        </Border>
+        <Border BorderBrush="{DynamicResource Stroke}" BorderThickness="1" Padding="10" Margin="6,0,0,6">
+          <StackPanel>
+            <TextBlock Text="Indexing" Foreground="{DynamicResource FgMuted}" FontSize="11"/>
+            <TextBlock Text="{Binding IndexingText}" TextWrapping="Wrap" Margin="0,4,0,0"/>
+          </StackPanel>
+        </Border>
+        <Border BorderBrush="{DynamicResource Stroke}" BorderThickness="1" Padding="10" Margin="0,6,6,0">
+          <StackPanel>
+            <TextBlock Text="Hashing" Foreground="{DynamicResource FgMuted}" FontSize="11"/>
+            <TextBlock Text="{Binding HashText}" TextWrapping="Wrap" Margin="0,4,0,0"/>
+          </StackPanel>
+        </Border>
+        <Border BorderBrush="{DynamicResource Stroke}" BorderThickness="1" Padding="10" Margin="6,6,0,0">
+          <StackPanel>
+            <TextBlock Text="Transfers" Foreground="{DynamicResource FgMuted}" FontSize="11"/>
+            <TextBlock Text="{Binding TransferText}" TextWrapping="Wrap" Margin="0,4,0,0"/>
+          </StackPanel>
+        </Border>
+      </UniformGrid>
+
+      <Grid>
+        <Grid.ColumnDefinitions>
+          <ColumnDefinition Width="280"/>
+          <ColumnDefinition Width="10"/>
+          <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+        <DockPanel>
+          <TextBlock DockPanel.Dock="Top" Text="Current indexing jobs" FontWeight="SemiBold" Margin="0,0,0,6"/>
+          <ListView ItemsSource="{Binding Jobs}" BorderBrush="{DynamicResource Stroke}"
+                    ScrollViewer.VerticalScrollBarVisibility="Auto"
+                    ScrollViewer.HorizontalScrollBarVisibility="Disabled">
+            <ListView.ItemTemplate>
+              <DataTemplate>
+                <StackPanel Margin="0,2">
+                  <TextBlock Text="{Binding Title}" FontWeight="SemiBold"/>
+                  <TextBlock Text="{Binding Detail}" Foreground="{DynamicResource FgMuted}" TextTrimming="CharacterEllipsis"/>
+                  <TextBlock Text="{Binding Origin}" Foreground="{DynamicResource FgMuted}" FontSize="11"/>
+                </StackPanel>
+              </DataTemplate>
+            </ListView.ItemTemplate>
+          </ListView>
+        </DockPanel>
+        <DockPanel Grid.Column="2">
+          <TextBlock DockPanel.Dock="Top" Text="{Binding LogCaption}" FontWeight="SemiBold" Margin="0,0,0,6"/>
+          <ListView x:Name="EventList" ItemsSource="{Binding Events}" BorderBrush="{DynamicResource Stroke}"
+                    ScrollViewer.ScrollChanged="OnEventScrollChanged"
+                    ScrollViewer.VerticalScrollBarVisibility="Visible"
+                    ScrollViewer.HorizontalScrollBarVisibility="Auto"
+                    VirtualizingPanel.IsVirtualizing="True"
+                    VirtualizingPanel.VirtualizationMode="Recycling">
+            <ListView.View>
+              <GridView>
+                <GridViewColumn Header="Time" Width="70" DisplayMemberBinding="{Binding Time}"/>
+                <GridViewColumn Header="Area" Width="100" DisplayMemberBinding="{Binding Category}"/>
+                <GridViewColumn Header="Detail" Width="440" DisplayMemberBinding="{Binding Message}"/>
+              </GridView>
+            </ListView.View>
+          </ListView>
+        </DockPanel>
+      </Grid>
+    </DockPanel>
+  </DockPanel>
+</Window>