feat(daily-prep): trigger planning from inside the prep-log window with an empty-state hint

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

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

@@ -346,6 +346,8 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
             RecomputeCanMergeAll();
             ReviewCombinedDiffCommand.NotifyCanExecuteChanged();
         };
+
+        PrepLog.CollectionChanged += (_, _) => OnPropertyChanged(nameof(ShowPrepEmptyState));
     }
 
     private void OnTaskMessage(string taskId, string line)
@@ -381,6 +383,18 @@ public sealed partial class DetailsIslandViewModel : ViewModelBase
         AppendClaudeText(formatted, target, buf);
     }
 
+    [RelayCommand]
+    private async Task PlanDayAsync()
+    {
+        if (_worker is null) return;
+        try { await _worker.RunDailyPrepNowAsync(); }
+        catch { /* worker offline; PrepStarted/PrepLine will reconcile */ }
+    }
+
+    public bool ShowPrepEmptyState => !IsPrepRunning && PrepLog.Count == 0;
+
+    partial void OnIsPrepRunningChanged(bool value) => OnPropertyChanged(nameof(ShowPrepEmptyState));
+
     private void OnPrepStarted()
     {
         PrepLog.Clear();

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

@@ -37,15 +37,6 @@ public sealed partial class TasksIslandViewModel : ViewModelBase
         NotesRequested?.Invoke();
     }
 
-    [RelayCommand]
-    private async Task PrepareDayAsync()
-    {
-        if (_worker is null) return;
-        PrepRequested?.Invoke();
-        try { await _worker.RunDailyPrepNowAsync(); }
-        catch { /* worker offline; broadcast will reconcile on return */ }
-    }
-
     [RelayCommand]
     private void ShowPrepLog() => PrepRequested?.Invoke();
 

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

@@ -303,9 +303,23 @@
       <islands:NotesEditorView DataContext="{Binding Notes}"/>
     </Panel>
     <Panel IsVisible="{Binding IsPrepMode}">
-      <islands:SessionTerminalView
-          Entries="{Binding PrepLog}" Label="daily-prep"
-          IsRunning="{Binding IsPrepRunning}"/>
+      <DockPanel>
+        <Border DockPanel.Dock="Top" Padding="12,8">
+          <Button Classes="btn primary"
+                  Command="{Binding PlanDayCommand}"
+                  IsEnabled="{Binding !IsPrepRunning}"
+                  Content="{loc:Tr details.planDay}"/>
+        </Border>
+        <Panel>
+          <islands:SessionTerminalView
+              Entries="{Binding PrepLog}" Label="daily-prep"
+              IsRunning="{Binding IsPrepRunning}"/>
+          <TextBlock IsVisible="{Binding ShowPrepEmptyState}"
+                     HorizontalAlignment="Center" VerticalAlignment="Center"
+                     Foreground="{DynamicResource TextMuteBrush}"
+                     Text="{loc:Tr details.prepEmpty}"/>
+        </Panel>
+      </DockPanel>
     </Panel>
     </Grid>
 

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

@@ -79,14 +79,6 @@
             Command="{Binding OpenNotesCommand}"
             Content="{loc:Tr tasks.notesPinnedRow}"/>
 
-    <!-- Prepare Day button (My Day only) -->
-    <Button DockPanel.Dock="Top"
-            Classes="btn" HorizontalAlignment="Stretch" HorizontalContentAlignment="Left"
-            Margin="16,0,16,8"
-            IsVisible="{Binding IsMyDayList}"
-            Command="{Binding PrepareDayCommand}"
-            Content="{loc:Tr tasks.prepareDay}"/>
-
     <!-- Task list -->
     <ScrollViewer>
       <StackPanel Margin="10,4">