## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.
YES
## What kind of change does this PR introduce?
Feature
## Summary
Introduce a "Sign in with ChatGPT" option gated by the new
`dashboard_auth:sign_in_with_chatgpt` feature flag and a manual
localStorage rollout switch (`SIGN_IN_CHATGPT_ENABLED`), since the
feature is still WIP.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added support for signing in with ChatGPT alongside GitHub.
* ChatGPT sign-in now depends on both a feature flag and an additional
rollout setting.
* Updated provider availability so the app can show the correct sign-in
options.
* **Bug Fixes**
* Improved validation and coverage to ensure sign-in options appear only
when fully enabled.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->