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-front/src/modules/ai/states/agentChatContextState.ts

@@ -1,13 +0,0 @@
-import { atom } from 'recoil';
-
-export type AIChatObjectMetadataAndRecordContext = {
-  type: 'objectMetadataId' | 'recordId';
-  id: string;
-};
-
-export const agentChatContextState = atom<
-  Array<AIChatObjectMetadataAndRecordContext>
->({
-  key: 'ai/agentChatContextState',
-  default: [],
-});