feat(ui): wire batch selection, target loading and resolve seam

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

src/ClaudeDo.Ui/ViewModels/Modals/WorktreesOverviewModalViewModel.cs

@@ -69,9 +69,9 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     [ObservableProperty] private bool _isBusy;
     [ObservableProperty] private string? _statusMessage;
     [ObservableProperty] private WorktreeOverviewRowViewModel? _selectedRow;
-    [ObservableProperty] private string? _selectedTarget;
+    [ObservableProperty][NotifyCanExecuteChangedFor(nameof(MergeAllCommand))] private string? _selectedTarget;
-    [ObservableProperty] private int _selectedCount;
+    [ObservableProperty][NotifyCanExecuteChangedFor(nameof(MergeAllCommand))] private int _selectedCount;
-    [ObservableProperty] private bool _isMerging;
+    [ObservableProperty][NotifyCanExecuteChangedFor(nameof(MergeAllCommand))] private bool _isMerging;
     [ObservableProperty] private string? _batchProgress;
 
     public ObservableCollection<WorktreeOverviewRowViewModel> Rows { get; } = new();
@@ -125,20 +125,24 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
 
             Rows.Clear();
             Groups.Clear();
+            ConflictRows.Clear();
+            SelectedCount = 0;
+            BatchProgress = null;
             if (IsGlobal)
             {
                 foreach (var grp in ordered.GroupBy(r => (r.ListId, r.ListName))
                                             .OrderBy(g => g.Key.ListName, StringComparer.OrdinalIgnoreCase))
                 {
                     var group = new WorktreesGroupViewModel { ListId = grp.Key.ListId, ListName = grp.Key.ListName };
-                    foreach (var row in grp) group.Rows.Add(row);
+                    foreach (var row in grp) { HookRow(row); group.Rows.Add(row); }
                     Groups.Add(group);
                 }
             }
             else
             {
-                foreach (var row in ordered) Rows.Add(row);
+                foreach (var row in ordered) { HookRow(row); Rows.Add(row); }
             }
+            await LoadMergeTargetsAsync();
         }
         finally
         {
@@ -278,6 +282,63 @@ public sealed partial class WorktreesOverviewModalViewModel : ViewModelBase
     public IEnumerable<WorktreeOverviewRowViewModel> AllRows =>
         IsGlobal ? Groups.SelectMany(g => g.Rows) : Rows;
 
+    private void HookRow(WorktreeOverviewRowViewModel row)
+    {
+        row.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName is nameof(WorktreeOverviewRowViewModel.IsChecked)
+                               or nameof(WorktreeOverviewRowViewModel.State))
+                RecomputeSelected();
+        };
+    }
+
+    private void RecomputeSelected() =>
+        SelectedCount = AllRows.Count(r => r.IsChecked && r.IsActive);
+
+    // Test seam: adds a row to the flat list with selection tracking wired up.
+    internal void AddRowForTest(WorktreeOverviewRowViewModel row)
+    {
+        HookRow(row);
+        Rows.Add(row);
+    }
+
+    private async Task LoadMergeTargetsAsync()
+    {
+        var anchor = AllRows.FirstOrDefault(r => r.IsActive);
+        if (anchor is null) { MergeTargets.Clear(); SelectedTarget = null; return; }
+        try
+        {
+            var targets = await _worker.GetMergeTargetsAsync(anchor.TaskId);
+            MergeTargets.Clear();
+            if (targets is null) { SelectedTarget = null; return; }
+            foreach (var b in targets.LocalBranches) MergeTargets.Add(b);
+            SelectedTarget = MergeTargets.Contains(targets.DefaultBranch)
+                ? targets.DefaultBranch
+                : MergeTargets.FirstOrDefault();
+        }
+        catch { MergeTargets.Clear(); SelectedTarget = null; }
+    }
+
+    private bool CanMergeAll() => !IsMerging && SelectedCount > 0 && !string.IsNullOrWhiteSpace(SelectedTarget);
+
+    [RelayCommand(CanExecute = nameof(CanMergeAll))]
+    private Task MergeAll() => MergeSelectedAsync(_worker.MergeTaskAsync);
+
+    [RelayCommand]
+    private void ResolveConflict(WorktreeOverviewRowViewModel? row)
+    {
+        if (row is null) return;
+        RequestConflictResolution?.Invoke(row.TaskId, SelectedTarget ?? "");
+    }
+
+    [RelayCommand]
+    private void ToggleSelectAll()
+    {
+        var actives = AllRows.Where(r => r.IsActive).ToList();
+        var allChecked = actives.Count > 0 && actives.All(r => r.IsChecked);
+        foreach (var r in actives) r.IsChecked = !allChecked;
+    }
+
     public async Task MergeSelectedAsync(
         Func<string, string, bool, string, Task<MergeResultDto>> mergeFn,
         CancellationToken ct = default)

tests/ClaudeDo.Ui.Tests/ViewModels/WorktreesOverviewBatchMergeTests.cs

@@ -114,4 +114,54 @@ public class WorktreesOverviewBatchMergeTests
         Assert.False(called);
         Assert.Equal(BatchMergeOutcome.None, a.MergeOutcome);
     }
+
+    [Fact]
+    public void SelectedCount_tracks_checked_active_rows()
+    {
+        var vm = NewVm();
+        var a = ActiveRow("a");
+        var b = ActiveRow("b");
+        var merged = ActiveRow("c"); merged.State = WorktreeState.Merged;
+        vm.AddRowForTest(a); vm.AddRowForTest(b); vm.AddRowForTest(merged);
+
+        Assert.Equal(0, vm.SelectedCount);
+        a.IsChecked = true;
+        Assert.Equal(1, vm.SelectedCount);
+        b.IsChecked = true;
+        merged.IsChecked = true;
+        Assert.Equal(2, vm.SelectedCount);
+        a.IsChecked = false;
+        Assert.Equal(1, vm.SelectedCount);
+    }
+
+    [Fact]
+    public void ResolveConflict_invokes_seam_with_task_and_target()
+    {
+        var vm = NewVm();
+        vm.SelectedTarget = "release";
+        var row = ActiveRow("x"); row.MergeOutcome = BatchMergeOutcome.Conflict;
+
+        (string Task, string Target)? captured = null;
+        vm.RequestConflictResolution = (taskId, target) => { captured = (taskId, target); return System.Threading.Tasks.Task.CompletedTask; };
+
+        vm.ResolveConflictCommand.Execute(row);
+
+        Assert.Equal(("x", "release"), captured);
+    }
+
+    [Fact]
+    public void MergeAll_canExecute_requires_target_selection_and_idle()
+    {
+        var vm = NewVm();
+        var a = ActiveRow("a");
+        vm.AddRowForTest(a);
+
+        Assert.False(vm.MergeAllCommand.CanExecute(null));
+        a.IsChecked = true;
+        Assert.False(vm.MergeAllCommand.CanExecute(null));
+        vm.SelectedTarget = "main";
+        Assert.True(vm.MergeAllCommand.CanExecute(null));
+        vm.IsMerging = true;
+        Assert.False(vm.MergeAllCommand.CanExecute(null));
+    }
 }