KEISEI ASCII logo (голубой) at install start; [install] prefix тёмно-жёлтый
(38;5;178); primitive names + language codes голубой (38;5;39); language names
тёмно-жёлтый. lib-log COLOR now enables under curl|bash (detect terminal via
[ -t 1 ] || /dev/tty — web-install tees stdout so -t 1 was false → colors off).
Color detection, not an interactivity gate. Verified piped-under-pty.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>