Codex 0.167.0 adds an agent command center, backend switching in the session picker and image previews

OpenAI's release notes for Codex 0.167.0 list these changes:

• Agent command center: open it with codex agents --no-daemon. The command center and the session picker now mark unread results.
• Backends: switch between connected backends from the terminal session picker, keeping your drafts.
• Images: preview local image attachments while composing on supported terminals, and open viewed local images from clickable paths in the transcript.
• Sign-in: API key and cloud provider options sit under "Sign in another way". Turning on gcp_setup_wizard sets up Google Cloud Vertex AI with Application Default Credentials or a credential file.
• Settings: macOS or Windows system proxy settings can be opted into from /experimental.
• Approvals: patch details can be expanded in the transcript while an approval prompt is open.

Fixes include saved chats staying visible after you switch model providers (a chat that cannot resume can be read, with an editable prompt to continue in a new chat), Ctrl+L clearing the display while keeping earlier messages available through Ctrl+T, network approval prompts closing when their requests end, and automatic context compaction accounting for failed or usage-less responses. The app-server README now covers managed network constraints under [permissions.network] and command rules that require fresh human approval.