feat(daily-prep): load persisted prep log into the terminal on open

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

src/ClaudeDo.Ui/Services/WorkerClient.cs

@@ -360,6 +360,9 @@ public partial class WorkerClient : ObservableObject, IAsyncDisposable, IWorkerC
     public async Task DeleteDailyNoteAsync(string id)
         => await _hub.InvokeAsync("DeleteDailyNote", id);
 
+    public async Task<string> GetLastPrepLogAsync()
+        => await TryInvokeAsync<string>("GetLastPrepLog") ?? string.Empty;
+
     public async Task UpdateListAsync(UpdateListDto dto)
     {
         await _hub.InvokeAsync("UpdateList", dto);