Brand audit fixes: domain casing, radii, violet, seal size, page seals

- Store domain shown as Store.GregKilmer.com (no uppercase transform)
- Cards and panels 10px corners; buttons pill-shaped
- Canvas star/circuit violet switched to brand violet #6A2FE0
- Nav, store nav and footer seal at the brand's 72px minimum (nav 80px tall)
- Faint seals on contact, store cards, deck boxes, order and professional

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

src/components/layout/Footer.astro

@@ -26,7 +26,7 @@ const socialList = Object.values(socials);
   />
   <div class="container-prose relative z-10 flex flex-col items-center gap-6 py-10 text-center sm:flex-row sm:justify-between sm:text-left">
     <div class="flex items-center gap-3">
-      <img src="/brand/patiun-seal.svg" alt="" width="48" height="48" class="h-12 w-12 shrink-0" />
+      <img src="/brand/patiun-seal.svg" alt="" width="72" height="72" class="h-[72px] w-[72px] shrink-0" />
       <div class="flex flex-col gap-1">
         <p class="font-display text-sm font-bold uppercase tracking-[0.14em]" style="color: var(--color-text);">
           {siteIdentity.name}