v0.1.9

• Fix button rendering width inside nav headers by removing whitespace and adding font-size: 0.
• Demote Atmosphere wave motif to an experimental feature in text.
• Remove overlapping s-hero-art collage from the landing page.
• Add a standard u-shell shell system and use it across playground and landing page for consistent spacing and margins.
• Add a new "Authentication" preset to the playground.
• Fix u-callout border rendering corner artifact by using a pseudo element.

Changelog

Each release is a vX.Y.Z tag with a GitHub Release: notes from this file, the npm tarball, SHA256SUMS and a signed build-provenance attestation. During 0.x, any release may change markup or class names; read the notes before upgrading.