v0.11.1

Fixed

• The footer bar's working directory now follows cd. It read the
  session's static start path, so a cd in the terminal moved the session
  card but left the footer stale. It now overlays the same live-cwd source the
  card follows.

Changed

• The session cwd is polled every ~300 ms (was every 2 s), so a cd shows
  up in the card and footer promptly. Each read is one cheap syscall and emits
  only on change, so a static directory still costs nothing.