Broken auth endpoints link in MCP interface documentation

What is the type of issue?

Documentation is incorrect

What is the issue?

The “Auth endpoints (v2)” link in
codex-rs/docs/codex_mcp_interface.md points to
#auth-endpoints-v2.

The target heading in codex-rs/app-server/README.md is
## Auth endpoints, which generates the #auth-endpoints anchor, so the
current link does not resolve.

Proposed fix

Change the link fragment from #auth-endpoints-v2 to #auth-endpoints.

I have a one-line patch ready and would be happy to submit it if a maintainer
would like a pull request.

Where did you find it?

Broken link under “Auth helpers”:
https://github.com/openai/codex/blob/main/codex-rs/docs/codex_mcp_interface.md#auth-helpers

Intended target, “Auth endpoints”:
https://github.com/openai/codex/blob/main/codex-rs/app-server/README.md#auth-endpoints