Claude Code OAuth timeout locks out Windows users

This is an availability problem disguised as a bug report: if auth fails, the product is effectively down for the user. The issue is specific and reproducible on Windows, with WSL mentioned in the environment. The failure happens after completing the browser OAuth flow, so the handoff back into Claude Code appears to be broken. The reported timeout is short enough to suggest either an integration regression or a platform-specific callback issue. Because login is blocked, the impact is immediate and total for affected users, which makes this feel more like a service incident than a routine bug.