Merge branch 'main' into chunk-data

app/MindWork AI Studio/Tools/Validation/FileExtensionValidation.cs

@@ -43,6 +43,14 @@ public static class FileExtensionValidation
     /// <returns>True if valid, false if invalid (error/warning already sent via MessageBus).</returns>
     public static async Task<bool> IsExtensionValidWithNotifyAsync(UseCase useCae, string filePath, bool validateMediaFileTypes = true, Settings.Provider? provider = null)
     {
+        if (string.Equals(Path.GetExtension(filePath), ".doc", StringComparison.OrdinalIgnoreCase))
+        {
+            await MessageBus.INSTANCE.SendWarning(new(
+                Icons.Material.Filled.Description,
+                TB("This file format is not supported. Please convert the .doc file to .docx (e.g. with Microsoft Word).")));
+            return false;
+        }
+
         if (FileTypes.IsAllowedPath(filePath, FileTypes.EXECUTABLES))
         {
             await MessageBus.INSTANCE.SendError(new(
@@ -138,4 +146,4 @@ public static class FileExtensionValidation
 
         return true;
     }
-}
+}