Phase 4: component library

The approved element rules and ornament kit as Astro components in
packages/ui: buttons, pills, chips, filters, kickers, notices, fields and
cards; star paths, the header divider, tick scales and rings, seals and
edge seals, gilt corners, dust and placeholder art; the site header,
footer and page shell. Brand fonts are self-hosted. A gallery page shows
everything, and astro check now runs with the root typecheck.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012aSbo2D1qP8cMFQCykf7kx

packages/ui/src/assets/motifs/craft-seal-dice.svg

@@ -0,0 +1,2 @@
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