Function term_width 

pub fn term_width() -> usize

$COLUMNS when it is exported and sane, else a conservative 80 — the region’s lines are short and an ioctl is not worth its portability. 80, not wider: shells rarely export COLUMNS, and a region line longer than the real terminal wraps, which breaks the erase arithmetic.

pub is now wider than it needs to be — the out-of-crate caller that justified it, amont-agent, is its own project and carries its own copy. Left public rather than narrowed in the same change that removed it.