feat(ui): detach a monitor into its own window

src/ClaudeDo.Ui/Views/MissionControl/MonitorPaneView.axaml

@@ -18,6 +18,8 @@
         <StackPanel Orientation="Horizontal" Spacing="8">
           <Button Classes="btn" Content="{loc:Tr missionControl.openInApp}"
                   Command="{Binding OpenInAppCommand}" />
+          <Button Classes="btn" Content="{loc:Tr missionControl.detach}"
+                  Command="{Binding DetachCommand}" />
           <Button Classes="btn" Content="{loc:Tr missionControl.cancel}"
                   Command="{Binding CancelTaskCommand}"
                   IsVisible="{Binding IsRunning}" />

src/ClaudeDo.Ui/Views/MissionControl/TaskMonitorWindow.axaml

@@ -0,0 +1,12 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:vm="using:ClaudeDo.Ui.ViewModels.Islands"
+        xmlns:mc="using:ClaudeDo.Ui.Views.MissionControl"
+        x:Class="ClaudeDo.Ui.Views.MissionControl.TaskMonitorWindow"
+        x:DataType="vm:TaskMonitorViewModel"
+        Title="{Binding DisplayTitle}"
+        Width="560" Height="620" MinWidth="360" MinHeight="320"
+        Background="{DynamicResource VoidBrush}"
+        Icon="avares://ClaudeDo.Ui/Assets/ClaudeTask.ico">
+  <mc:MonitorPaneView />
+</Window>

src/ClaudeDo.Ui/Views/MissionControl/TaskMonitorWindow.axaml.cs

@@ -0,0 +1,8 @@
+using Avalonia.Controls;
+
+namespace ClaudeDo.Ui.Views.MissionControl;
+
+public partial class TaskMonitorWindow : Window
+{
+    public TaskMonitorWindow() => InitializeComponent();
+}