Fix: Don't calculate hashes

Update HashesViewModel.cs

Author: yaira2

src/Files.App/Strings/en-US/Resources.resw

@@ -2328,6 +2328,9 @@
   <data name="CalculationError" xml:space="preserve">
     <value>An error occurred during the calculation</value>
   </data>
+  <data name="CalculationOnlineFileHashError" xml:space="preserve">
+    <value>Can't calculate hash for online file</value>
+  </data>
   <data name="Algorithm" xml:space="preserve">
     <value>Algorithm</value>
   </data>

src/Files.App/ViewModels/Properties/HashesViewModel.cs

@@ -1,20 +1,8 @@
 // Copyright (c) 2023 Files Community
 // Licensed under the MIT License. See the LICENSE.
 
-using CommunityToolkit.Mvvm.ComponentModel;
-using CommunityToolkit.Mvvm.DependencyInjection;
-using CommunityToolkit.Mvvm.Input;
-using CommunityToolkit.WinUI;
-using Files.App.Extensions;
-using Files.App.Utils;
-using Files.Shared.Extensions;
 using Files.Shared.Helpers;
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
 using System.IO;
-using System.Linq;
-using System.Threading;
 using System.Windows.Input;
 
 namespace Files.App.ViewModels.Properties
@@ -80,6 +68,13 @@ private void ToggleIsEnabled(string? algorithm)
 				UserSettingsService.GeneralSettingsService.ShowHashesDictionary = ShowHashes;
 			}
 
+			// Don't calculate hashes for online files
+			if (_item.SyncStatusUI.SyncStatus == CloudDriveSyncStatus.FileOnline)
+			{
+				hashInfoItem.HashValue = "CalculationOnlineFileHashError".GetLocalizedResource();
+				return;
+			}
+
 			if (hashInfoItem.HashValue is null && hashInfoItem.IsEnabled)
 			{
 				hashInfoItem.IsCalculating = true;