Plan step 38: the corner grid and the shape gallery move onto <x-grid> and <x-stack>; each corner swatch is a data-md-showcase- shape-swatch keyed on data-md-corner, one showcase.css rule per corner token; <x-shape :size="80"> replaces the size-20 utility, its fill the caller's style="color: var(--md-sys-color-secondary- container)" since a shape's colour is inherited text colour, not a class. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9