Adds --color-warn, .wt-tag--good/--warn/--bad/--accent (tinted surface, theme text, readable in every palette), .wt-pre for logs and terminal captures, and .wt-row/.wt-stack so small apps need no own CSS. Claude-Session: https://claude.ai/code/session_01QhLkBGEip8wQdaZ54z4AqJ