From 3146a52f40620352c031435e70003fa8ce2e78ed Mon Sep 17 00:00:00 2001
From: Thorsten Sommer <mail@tsommer.org>
Date: Mon, 8 Dec 2025 20:52:36 +0100
Subject: [PATCH] Fix crash in local data sources dialog for directories

---
 .../Dialogs/DataSourceLocalDirectoryInfoDialog.razor            | 2 +-
 .../Dialogs/DataSourceLocalDirectoryInfoDialog.razor.cs         | 2 ++
 app/MindWork AI Studio/wwwroot/changelog/v0.9.55.md             | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor b/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor
index 44e1cec4..e80bad6a 100644
--- a/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor	
@@ -41,7 +41,7 @@
         <TextInfoLine Label="@T("Maximum matches per query")" Value="@this.DataSource.MaxMatches.ToString()" ClipboardTooltipSubject="@T("the maximum number of matches per query")"/>
 
         <TextInfoLine Icon="@Icons.Material.Filled.SquareFoot" Label="@T("Number of files")" Value="@this.NumberFilesInDirectory" ClipboardTooltipSubject="@T("the number of files in the directory")"/>
-        <TextInfoLines Label="@T("Files list")" MaxLines="14" Value="@this.directoryFiles.ToString()" ClipboardTooltipSubject="@T("the files list")"/>
+        <TextInfoLines Label="@T("Files list")" MaxLines="14" Value="@this.directoryFilesText" ClipboardTooltipSubject="@T("the files list")"/>
         @if (this.directorySizeNumFiles > 100)
         {
             <MudJustifiedText Typo="Typo.body1" Color="Color.Warning" Class="mb-3">
diff --git a/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor.cs b/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor.cs
index 839fd5b8..73bc8dc6 100644
--- a/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor.cs	
+++ b/app/MindWork AI Studio/Dialogs/DataSourceLocalDirectoryInfoDialog.razor.cs	
@@ -51,6 +51,7 @@ public partial class DataSourceLocalDirectoryInfoDialog : MSGComponentBase, IAsy
     private long directorySizeBytes;
     private long directorySizeNumFiles;
     private readonly StringBuilder directoryFiles = new();
+    private string directoryFilesText = string.Empty;
     private Task directorySizeTask = Task.CompletedTask;
     
     private bool IsOperationInProgress { get; set; } = true;
@@ -63,6 +64,7 @@ public partial class DataSourceLocalDirectoryInfoDialog : MSGComponentBase, IAsy
     {
         this.directoryFiles.Append("- ");
         this.directoryFiles.AppendLine(file);
+        this.directoryFilesText = this.directoryFiles.ToString();
     }
 
     private void UpdateDirectorySize(long size)
diff --git a/app/MindWork AI Studio/wwwroot/changelog/v0.9.55.md b/app/MindWork AI Studio/wwwroot/changelog/v0.9.55.md
index 3b5a3599..fb8ab9d2 100644
--- a/app/MindWork AI Studio/wwwroot/changelog/v0.9.55.md	
+++ b/app/MindWork AI Studio/wwwroot/changelog/v0.9.55.md	
@@ -4,3 +4,4 @@
 - Improved the document analysis assistant (in preview) by adding descriptions to the different sections.
 - Improved the document preview dialog for the document analysis assistant (in preview), providing Markdown and plain text views for attached files.
 - Improved the ID handling for configuration plugins.
+- Fixed a bug in the local data sources info dialog (preview feature) for data directories that could cause the app to crash. The error was caused by a background thread producing data while the frontend attempted to display it.
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