fix: remove remaining direct cookie writes that make tokenPair a session cookie on renewal (#19031)

## Summary

- Removes two remaining direct `cookieStorage.setItem('tokenPair', ...)`
calls that were overwriting the Jotai-managed cookie (180-day expiry)
with a session cookie (no expiry) during **token renewal**
- Followup to #18795 which fixed the same issue in `handleSetAuthTokens`
but missed the renewal code paths

## Root cause

Two token renewal paths still had direct cookie writes without
`expires`:

1. **`apollo.factory.ts`** — `attemptTokenRenewal()` fires on every
`UNAUTHENTICATED` GraphQL error after a successful token refresh
2. **`useAgentChat.ts`** — `retryFetchWithRenewedToken()` fires on 401
from the AI chat endpoint

Both called `cookieStorage.setItem('tokenPair', JSON.stringify(tokens))`
without an `expires` attribute, creating a session cookie that overwrote
the Jotai-managed one. This is why the bug was **intermittent after
#18795**: it only appeared after a token renewal, not on fresh login.

The `onTokenPairChange` / `setTokenPair` calls already write through
Jotai's `atomWithStorage` → `createJotaiCookieStorage`, which always
sets `expires: 180 days`.

## Test plan

- Log in to the app
- Wait for a token renewal to occur (or force one by letting the access
token expire)
- Inspect the `tokenPair` cookie in DevTools → Application → Cookies
- Verify the cookie retains an expiration date ~180 days from now (not
"Session")
- Close and reopen the browser — confirm you remain logged in


Made with [Cursor](https://cursor.com)

packages/twenty-front/src/modules/ai/hooks/useAgentChat.ts

@@ -31,8 +31,6 @@ import { useCallback, useState } from 'react';
 import { type ExtendedUIMessage } from 'twenty-shared/ai';
 import { isDefined } from 'twenty-shared/utils';
 import { REACT_APP_SERVER_BASE_URL } from '~/config';
-import { cookieStorage } from '~/utils/cookie-storage';
-
 export const useAgentChat = (
   uiMessages: ExtendedUIMessage[],
   ensureThreadIdForSend: () => Promise<string | null>,
@@ -94,7 +92,6 @@ export const useAgentChat = (
         return null;
       }
 
-      cookieStorage.setItem('tokenPair', JSON.stringify(renewedTokens));
       setTokenPair(renewedTokens);
 
       const updatedHeaders = new Headers(init?.headers ?? {});

packages/twenty-front/src/modules/apollo/services/apollo.factory.ts

@@ -34,7 +34,6 @@ import {
 import isEmpty from 'lodash.isempty';
 import { getGenericOperationName, isDefined } from 'twenty-shared/utils';
 import { REACT_APP_SERVER_BASE_URL } from '~/config';
-import { cookieStorage } from '~/utils/cookie-storage';
 import { isUndefinedOrNull } from '~/utils/isUndefinedOrNull';
 
 const logger = loggerLink(() => 'Twenty');
@@ -175,7 +174,6 @@ export class ApolloFactory implements ApolloManager {
 
         if (isDefined(tokens)) {
           onTokenPairChange?.(tokens);
-          cookieStorage.setItem('tokenPair', JSON.stringify(tokens));
         }
       };