RatatuiRuby — Terminal UIs in RubyInline Viewports Standard TUIs erase themselves on exit. Your carefully formatted CLI output disappears. Users lose their scrollback. Inline viewports solve this. They occupy a fixed number of lines, render rich UI, then leave the output in place when done. Perfect for spinners, menus, progress indicators—any brief moment of richness. class Spinner def main RatatuiRuby.run(viewport: :inline, heigh
