feat(ui): live task updates from worker events + planning polish

Wire TasksIslandViewModel to TaskUpdated/WorktreeUpdated/TaskMessage worker
events so rows refresh without a full reload; add ForegroundHelper to permit
wt.exe to take foreground on planning launch; misc UI polish on lists, task
rows and settings modal.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Ui/Views/Modals/ListSettingsModalView.axaml

@@ -14,6 +14,7 @@
 
   <Window.KeyBindings>
     <KeyBinding Gesture="Escape" Command="{Binding CancelCommand}"/>
+    <KeyBinding Gesture="Enter" Command="{Binding SaveCommand}"/>
   </Window.KeyBindings>
 
   <Window.Styles>
@@ -82,7 +83,7 @@
               <StackPanel Spacing="12">
                 <StackPanel Spacing="4">
                   <TextBlock Classes="field-label" Text="Name"/>
-                  <TextBox Text="{Binding Name}" />
+                  <TextBox Text="{Binding Name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
                 </StackPanel>
 
                 <StackPanel Spacing="4">