Improvement AI chat error handling (#15035)

- Fixed AI chat failures when tool calls were present in conversation
history
- Improved error handling and user feedback for AI streaming errors



https://github.com/user-attachments/assets/ca85820f-32c0-4f42-86ee-98f4543e6038

packages/twenty-server/src/engine/metadata-modules/agent/utils/mapUIMessagePartsToDBParts.ts

@@ -64,7 +64,7 @@ export const mapUIMessagePartsToDBParts = (
       default:
         {
           if (isToolPart(part)) {
-            const { toolCallId, input, output, errorText } = part;
+            const { toolCallId, input, output, errorText, state } = part;
 
             return {
               ...basePart,
@@ -72,6 +72,7 @@ export const mapUIMessagePartsToDBParts = (
               toolInput: input,
               toolOutput: output,
               errorMessage: errorText,
+              state,
             };
           }
         }