Update ShellViewModel.cs

Author: yaira2

src/Files.App/ViewModels/ShellViewModel.cs

@@ -754,6 +754,7 @@ public string? FilesAndFoldersFilter
 			{
 				if (SetProperty(ref _filesAndFoldersFilter, value))
 				{
+					// Apply the updated filter to the files and folders list
 					FilesAndFolderFilterUpdated();
 				}
 			}
@@ -764,12 +765,26 @@ private void FilesAndFolderFilterUpdated()
 			_ = ApplyFilesAndFoldersChangesAsync();
 		}
 
+		/// <summary>
+		/// Clears the files and folder filter.
+		/// This is used when the directory is changed or refreshed.
+		/// </summary>
 		private void ClearFilesAndFolderFilter()
 		{
-			if (!string.IsNullOrEmpty(FilesAndFoldersFilter) && UserSettingsService.FoldersSettingsService.KeyboardTypingBehavior == KeyboardTypingBehavior.FilterItems)
+			// Hide the filter header if:
+			// - Keyboard behavior is set to filter items
+			// - A filter is currently applied
+			//
+			// Keep the header visible if:
+			// - The filter is already empty (e.g. opened manually)
+			if (UserSettingsService.FoldersSettingsService.KeyboardTypingBehavior == KeyboardTypingBehavior.FilterItems &&
+				!string.IsNullOrEmpty(FilesAndFoldersFilter))
+			{
 				UserSettingsService.GeneralSettingsService.ShowFilterHeader = false;
+			}
 
-			FilesAndFoldersFilter = null;
+			// Clear the filter
+			FilesAndFoldersFilter = string.Empty;
 		}
 
 		// Apply changes immediately after manipulating on filesAndFolders completed