Add host activity and DB browser, and keep dialogs, drag-drop, and idle maintenance responsive.

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

src/Explorer.Indexing/FolderReconciler.cs

@@ -26,7 +26,7 @@ public sealed class FolderReconciler
         _preferences = preferences;
     }
 
-    public Task ReconcileAsync(Source source, string pathRel, CancellationToken cancellationToken)
+    public Task<bool> ReconcileAsync(Source source, string pathRel, CancellationToken cancellationToken)
         => ReconcileAsync(source, pathRel, cancellationToken, verifyChildren: false);
 
     public Task<bool> ReconcileAsync(
@@ -74,11 +74,25 @@ public sealed class FolderReconciler
             return false;
         }
 
-        if (!Directory.Exists(full) || LocationClassifier.IsRecycleBinName(parent.Name))
+        if (LocationClassifier.IsRecycleBinName(parent.Name))
         {
             return false;
         }
 
+        if (!IndexedPathPresence.DirectoryExists(full))
+        {
+            if (string.IsNullOrEmpty(pathRel))
+            {
+                return false;
+            }
+
+            var gone = DateTimeOffset.UtcNow;
+            await _store.Entries.TombstoneByPathPrefixAsync(source.Id, parent.PathRel, gone, cancellationToken)
+                .ConfigureAwait(false);
+            await _store.Entries.TombstoneAsync(parent.Id, gone, cancellationToken).ConfigureAwait(false);
+            return true;
+        }
+
         var live = await _providers.EnrichAsync(_enumerator.EnumerateChildrenSafe(full, out _), cancellationToken)
             .ConfigureAwait(false);
         var indexed = await _store.Entries.GetChildrenAsync(source.Id, parent.Id, EntryStatus.Present, cancellationToken)