feat(ui): wire worktree overview modal entry points

Add list context-menu command (per-list mode) and Help menu entry (global mode) for the WorktreesOverviewModal; register VM and factory in DI.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ClaudeDo.Ui/Views/Islands/ListsIslandView.axaml

@@ -132,6 +132,9 @@
                     <MenuItem Header="Settings..."
                               Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenListSettingsCommand}"
                               CommandParameter="{Binding}"/>
+                    <MenuItem Header="Worktrees anzeigen…"
+                              Command="{Binding $parent[UserControl].((vm:ListsIslandViewModel)DataContext).OpenWorktreesOverviewCommand}"
+                              CommandParameter="{Binding}"/>
                   </ContextMenu>
                 </Border.ContextMenu>
                 <Grid ColumnDefinitions="20,*,Auto">

src/ClaudeDo.Ui/Views/Islands/ListsIslandView.axaml.cs

@@ -1,3 +1,4 @@
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 using ClaudeDo.Ui.ViewModels.Islands;
@@ -25,6 +26,23 @@ public partial class ListsIslandView : UserControl
                     if (top is null) window.Show();
                     else await window.ShowDialog(top);
                 };
+                vm.ShowWorktreesOverviewModal = async modal =>
+                {
+                    var window = new WorktreesOverviewModalView { DataContext = modal };
+                    modal.CloseAction = () => window.Close();
+                    modal.JumpToTaskAction = (listId, _) =>
+                    {
+                        if (vm is { } v)
+                        {
+                            var item = v.UserLists.FirstOrDefault(l => l.Id == $"user:{listId}");
+                            if (item is not null) v.SelectedList = item;
+                        }
+                    };
+                    // TODO: ShowDiffAction and ConfirmAction not wired in v1
+                    var top = TopLevel.GetTopLevel(this) as Window;
+                    if (top is null) window.Show();
+                    else await window.ShowDialog(top);
+                };
             }
         };
     }

src/ClaudeDo.Ui/Views/MainWindow.axaml

@@ -69,6 +69,8 @@
                         Command="{Binding CheckForUpdatesCommand}"/>
               <MenuItem Header="Restart worker"
                         Command="{Binding RestartWorkerCommand}"/>
+              <MenuItem Header="Worktrees…"
+                        Command="{Binding OpenWorktreesOverviewGlobalCommand}"/>
               <MenuItem Header="About…" Command="{Binding OpenAboutCommand}"/>
             </MenuItem>
           </Menu>

src/ClaudeDo.Ui/Views/MainWindow.axaml.cs

@@ -1,6 +1,8 @@
+using System.Linq;
 using Avalonia.Controls;
 using Avalonia.Input;
 using ClaudeDo.Ui.ViewModels;
+using ClaudeDo.Ui.ViewModels.Islands;
 using ClaudeDo.Ui.Views.Modals;
 using ClaudeDo.Ui.Views.Planning;
 
@@ -31,6 +33,21 @@ public partial class MainWindow : Window
                 aboutVm.CloseAction = () => { dlg.Close(); tcs.TrySetResult(true); };
                 await dlg.ShowDialog(this);
             };
+            vm.ShowWorktreesOverviewModal = async (modal) =>
+            {
+                var dlg = new WorktreesOverviewModalView { DataContext = modal };
+                modal.CloseAction = () => dlg.Close();
+                modal.JumpToTaskAction = (listId, _) =>
+                {
+                    if (DataContext is IslandsShellViewModel s)
+                    {
+                        var item = s.Lists?.UserLists.FirstOrDefault(l => l.Id == $"user:{listId}");
+                        if (item is not null && s.Lists is not null) s.Lists.SelectedList = item;
+                    }
+                };
+                // TODO: ShowDiffAction and ConfirmAction not wired in v1
+                await dlg.ShowDialog(this);
+            };
         }
     }