panel-left-close from coolicons in Line with regular corners. sidebar, collapse, hide, layout, pane. Other styles and corners: @coolicons/<style>/<radius>/panel-left-close with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/panel-left-close, and use @coolicons/panel-left-close for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/panel-left-close.json"