- Never block CowAgent startup when the Node.js or agently-cli install fails
- Install Node.js 22 from the official tarball into the persistent prefix, so
container recreation and image upgrades no longer reinstall it
- Keep user-upgraded CLI versions instead of downgrading on restart
- Move Agent Mail data to ./agent-mail-data, out of the cow-data mount
- Install the skill with `cow skill install` so it lands in the workspace
- Add an Extensions docs tab with en/zh/ja guides; drop the planning doc
Co-authored-by: cowagent <cow@cowagent.ai>