feat(ui): show transient prime status in footer

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

src/ClaudeDo.Ui/ViewModels/IslandsShellViewModel.cs

@@ -61,6 +61,9 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
 
     private readonly System.Timers.Timer _clearTimer = new(30_000) { AutoReset = false };
 
+    [ObservableProperty] private string? _primeStatus;
+    private readonly System.Timers.Timer _primeStatusTimer = new(5_000) { AutoReset = false };
+
     [RelayCommand]
     private void FocusSearch() => Lists?.RequestFocusSearch();
 
@@ -95,6 +98,16 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
         WorkerLogText = null;
     }
 
+    private void OnPrimeFired(PrimeFiredEvent evt)
+    {
+        var when = evt.FiredAt.LocalDateTime.ToString("HH:mm");
+        PrimeStatus = evt.Success
+            ? $"✓ Primed Claude at {when}"
+            : $"⚠ Prime failed: {evt.Message}";
+        _primeStatusTimer.Stop();
+        _primeStatusTimer.Start();
+    }
+
     private void OnPlanningMergeConflict(string planningTaskId, string subtaskId, IReadOnlyList<string> conflictedFiles)
     {
         // Already on UI thread (WorkerClient dispatches via Dispatcher.UIThread.Post).
@@ -177,6 +190,7 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
         };
         Worker.WorkerLogReceivedEvent += OnWorkerLogReceived;
         Worker.PlanningMergeConflictEvent += OnPlanningMergeConflict;
+        Worker.PrimeFired += OnPrimeFired;
         _clearTimer.Elapsed += (_, _) =>
         {
             if (Dispatcher.UIThread.CheckAccess())
@@ -184,6 +198,8 @@ public sealed partial class IslandsShellViewModel : ViewModelBase
             else
                 Dispatcher.UIThread.Post(ClearWorkerLog);
         };
+        _primeStatusTimer.Elapsed += (_, _) =>
+            Avalonia.Threading.Dispatcher.UIThread.Post(() => PrimeStatus = null);
         _ = Lists.LoadAsync();
         _updateCheck.PropertyChanged += (_, e) =>
         {

src/ClaudeDo.Ui/Views/MainWindow.axaml

@@ -217,6 +217,15 @@
                    TextTrimming="CharacterEllipsis"
                    VerticalAlignment="Center"/>
 
+        <!-- Right: prime status notification -->
+        <TextBlock DockPanel.Dock="Right"
+                   Text="{Binding PrimeStatus}"
+                   Foreground="{DynamicResource TextDimBrush}"
+                   FontSize="11"
+                   VerticalAlignment="Center"
+                   Margin="12,0,0,0"
+                   IsVisible="{Binding PrimeStatus, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+
         <!-- Spacer between pill and log -->
         <Panel/>
       </DockPanel>