* feat(backend): improve workspace support for web clients
* fix(config): preserve the default workspace directory
* chore(reme): bump version to 0.4.1.5
- Update __version__ from 0.4.1.4 to 0.4.1.5 in initialization file
* fix(chat): disable builtin tools in read-only mode
* fix(agent): make builtin tools opt-in
* fix(list): tolerate files removed during mtime sort
* fix(chat): expose complete read-only job set
