Codex 0.166.0 adds keyboard transcript selection, `codex doctor --network-only` and GPT-6.1 Terra in more catalogs

Codex 0.166.0, per its release notes:

• Transcript: keyboard-driven selection with word, line and page motions, integrated search and configurable shortcuts.
• Models: GPT-6.1 Terra is added to the bundled, Vertex AI and Amazon Bedrock model catalogs.
• Commands: codex queue --resume resumes unloaded threads after queueing a message; codex doctor --network-only runs focused configuration, connectivity and WebSocket diagnostics.
• Safety blocks: the TUI gives clearer explanations of safety blocks and offers selectable safer follow-up prompts.
• Markdown: async questions, choices, answers and transcript replies now render Markdown consistently.

Fixes include keeping acknowledged approval and permission settings when resuming or forking threads, preserving reasoning-token accounting across resume and fork to avoid premature compaction, and better TUI reconnection and offline /quit handling.