Added backups of all data, restorable on another computer (#1008)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Components/DataSourceManagement.razor.cs

@@ -419,6 +419,9 @@ public partial class DataSourceManagement : MSGComponentBase
         if (dataSource.IsEnterpriseConfiguration)
             return;
 
+        if (await this.RefuseWhileIndexingPaused(T("Delete Data Source")))
+            return;
+
         var dialogParameters = new DialogParameters<ConfirmDialog>
         {
             { x => x.Message, string.Format(T("Are you sure you want to delete the data source '{0}' of type '{1}'?"), dataSource.Name, dataSource.Type.GetDisplayName()) },
@@ -457,6 +460,21 @@ public partial class DataSourceManagement : MSGComponentBase
         }
     }
 
+    /// <summary>
+    /// Tells the user to wait while a backup copies the indexes or a restore waits for the restart:
+    /// deleting a data source discards its index, which waits for the end of the pause.
+    /// </summary>
+    /// <param name="title">The title of the action which waits.</param>
+    /// <returns>True when the action has to wait.</returns>
+    private async Task<bool> RefuseWhileIndexingPaused(string title)
+    {
+        if (!this.DataSourceEmbeddingService.IsIndexingPaused)
+            return false;
+
+        await this.DialogService.ShowMessageBox(title, T("AI Studio is backing up or restoring the indexes of your data sources right now. Please try again once that is done."), T("Close"));
+        return true;
+    }
+
     /// <summary>
     /// Edits a row of the table, which is either a data source or a mailbox.
     /// </summary>
@@ -533,6 +551,9 @@ public partial class DataSourceManagement : MSGComponentBase
         if (mailbox.IsEnterpriseConfiguration)
             return;
 
+        if (await this.RefuseWhileIndexingPaused(T("Delete Mailbox")))
+            return;
+
         var dialogParameters = new DialogParameters<ConfirmDialog>
         {
             { x => x.Message, string.Format(T("Are you sure you want to delete the mailbox '{0}'? Your mails stay on the server as they are. AI Studio only deletes its index of them and the stored password."), mailbox.Name) },