## What changed
- Configure Bazel to apply `opusic_sys_install_headers.patch` to `opusic-sys` with `-p1`.
- Run the cloud-managed MCP OAuth test with `--no-browser` and keep stdin open until the child exits so EOF cannot race the HTTP callback.
- Serialize the cancelled-refresh test with other auth environment tests and temporarily clear the access-token environment variable.
GitOrigin-RevId: ad76b72ae98320bd0e3ff3231e1ed874332ce38c