Show folder names immediately and refresh stale index sizes without walking the whole drive.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.FileOperations/TransferQueue.cs

@@ -1,3 +1,4 @@
+using Explorer.Application;
 using Explorer.Contracts;
 using Explorer.Domain;
 using Explorer.Domain.Abstractions;
@@ -6,7 +7,7 @@ using Microsoft.Extensions.Logging;
 
 namespace Explorer.FileOperations;
 
-public sealed class TransferQueue : BackgroundService, ITransferHost
+public sealed class TransferQueue : BackgroundService, ITransferHost, IForegroundWorkSignal
 {
     private readonly IOperationExecutor _executor;
     private readonly IIndexStore _store;
@@ -41,6 +42,15 @@ public sealed class TransferQueue : BackgroundService, ITransferHost
 
     public bool IsPaused => _queuePaused;
 
+    public bool HasForegroundWork()
+    {
+        lock (_gate)
+        {
+            return _jobs.Any(j => j.Status is TransferStatus.Queued or TransferStatus.Running
+                or TransferStatus.Cancelling or TransferStatus.Waiting);
+        }
+    }
+
     public IReadOnlyList<TransferJob> Snapshot()
     {
         lock (_gate)