feat(ui): My Day actions, orphan-aware grouping, menu restructure

Pending UI work:
- My Day add/remove context actions on task rows (parent removal cascades to children)
- orphan-aware grouping: a child whose parent isn't in view renders as a top-level row, not an indented draft
- shell menu restructure (Worker / Repositories submenus); 'Finalize plan' action, drop 'Queue subtasks sequentially'
- notes editor refinements
- subtask-row hover tweak (Surface3, no transition)
- bump Avalonia 12.0.0 -> 12.0.4

src/ClaudeDo.Ui/ViewModels/Islands/TaskRowViewModel.cs

@@ -31,6 +31,7 @@ public sealed partial class TaskRowViewModel : ViewModelBase
     [ObservableProperty] private bool _hasQueuedSubtasks;
     [ObservableProperty] private bool _showListChip = true;
     [ObservableProperty] private bool _parentFinalized;
+    [ObservableProperty] private bool _parentInView = true;
     [ObservableProperty] private int _roadblockCount;
     [ObservableProperty] private bool _isRefining;
 
@@ -46,9 +47,13 @@ public sealed partial class TaskRowViewModel : ViewModelBase
     public bool IsAgentSuggested   => IsChild && !string.IsNullOrEmpty(CreatedBy) && CreatedBy == ParentTaskId;
     public bool IsPlanningParent => PlanningPhase != PlanningPhase.None
                                   || HasPlanningChildren;
+    // A child only reads as a child while its parent shares the current view. When the parent is
+    // absent (removed from My Day, or daily-prep placed a lone child there), the row renders as a
+    // normal top-level task instead of an orphaned, indented Draft.
+    public bool ShowAsChild      => IsChild && ParentInView;
     // A subtask is Draft until its planning parent is finalized, then Planned (queueable).
-    public bool IsDraft          => IsChild && Status == TaskStatus.Idle && !ParentFinalized;
-    public bool IsPlanned        => IsChild && Status == TaskStatus.Idle && ParentFinalized;
+    public bool IsDraft          => ShowAsChild && Status == TaskStatus.Idle && !ParentFinalized;
+    public bool IsPlanned        => ShowAsChild && Status == TaskStatus.Idle && ParentFinalized;
 
     public bool CanOpenPlanningSession   => Status == TaskStatus.Idle
                                           && PlanningPhase == PlanningPhase.None
@@ -74,13 +79,23 @@ public sealed partial class TaskRowViewModel : ViewModelBase
     public bool IsQueued    => Status == TaskStatus.Queued && string.IsNullOrEmpty(BlockedByTaskId);
     public bool IsWaiting   => Status == TaskStatus.Queued && !string.IsNullOrEmpty(BlockedByTaskId);
     public bool CanRemoveFromQueue => IsQueued || HasQueuedSubtasks;
+    // "Send to queue" is the single queue entry. On a finalized planning parent it queues the
+    // plan (children) via CanQueuePlan; an Active (not-yet-finalized) planning parent is hidden —
+    // it must be finalized first.
     public bool CanSendToQueue => !IsRunning && !IsQueued && !IsWaitingForReview && !HasQueuedSubtasks
-                                  && (!IsChild || ParentFinalized);
+                                  && (!IsChild || ParentFinalized)
+                                  && PlanningPhase != PlanningPhase.Active;
     // Parent-level "send plan to queue" — only once the plan is finalized (children Planned).
+    // Drives the routing inside SendToQueue, not a separate menu entry.
     public bool CanQueuePlan => !IsChild && HasPlanningChildren
                                 && PlanningPhase == PlanningPhase.Finalized
                                 && !HasQueuedSubtasks;
+    // User-triggered finalize for a planning parent whose session was closed before finalizing.
+    public bool CanFinalizePlanning => PlanningPhase == PlanningPhase.Active && !IsChild;
     public bool HasSchedule => ScheduledFor.HasValue;
+    // "Add to My Day" — shown on any task not already in My Day; a Done task has no place in
+    // today's focus list. The mirror of "Remove from My Day" (gated on IsMyDay).
+    public bool CanAddToMyDay => !IsMyDay && !Done;
     public bool HasRoadblock => RoadblockCount > 0;
     public string RoadblockTooltip => RoadblockCount == 1
         ? "1 roadblock reported during the run — see details"
@@ -135,12 +150,20 @@ public sealed partial class TaskRowViewModel : ViewModelBase
     {
         OnPropertyChanged(nameof(IsChild));
         OnPropertyChanged(nameof(IsAgentSuggested));
+        OnPropertyChanged(nameof(ShowAsChild));
         OnPropertyChanged(nameof(IsDraft));
         OnPropertyChanged(nameof(IsPlanned));
         OnPropertyChanged(nameof(CanSendToQueue));
         OnPropertyChanged(nameof(CanOpenPlanningSession));
     }
 
+    partial void OnParentInViewChanged(bool value)
+    {
+        OnPropertyChanged(nameof(ShowAsChild));
+        OnPropertyChanged(nameof(IsDraft));
+        OnPropertyChanged(nameof(IsPlanned));
+    }
+
     partial void OnCreatedByChanged(string? value) => OnPropertyChanged(nameof(IsAgentSuggested));
 
     partial void OnParentFinalizedChanged(bool value)
@@ -159,6 +182,8 @@ public sealed partial class TaskRowViewModel : ViewModelBase
         OnPropertyChanged(nameof(CanOpenPlanningSession));
         OnPropertyChanged(nameof(CanResumeOrDiscardPlanning));
         OnPropertyChanged(nameof(CanQueuePlan));
+        OnPropertyChanged(nameof(CanSendToQueue));
+        OnPropertyChanged(nameof(CanFinalizePlanning));
         OnPropertyChanged(nameof(CanRefine));
     }
 
@@ -185,7 +210,12 @@ public sealed partial class TaskRowViewModel : ViewModelBase
     }
 
     partial void OnBranchChanged(string? value)    => OnPropertyChanged(nameof(HasBranch));
-    partial void OnDoneChanged(bool value)         => OnPropertyChanged(nameof(IsOverdue));
+    partial void OnDoneChanged(bool value)
+    {
+        OnPropertyChanged(nameof(IsOverdue));
+        OnPropertyChanged(nameof(CanAddToMyDay));
+    }
+    partial void OnIsMyDayChanged(bool value)      => OnPropertyChanged(nameof(CanAddToMyDay));
     partial void OnScheduledForChanged(DateTime? value)
     {
         OnPropertyChanged(nameof(IsOverdue));