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/mystic/CircuitField.tsx

@@ -57,7 +57,7 @@ export default function CircuitField({
     let nodes: Node[] = [];
 
     const gold = '#c9a24a';
-    const violet = '#8a63ee';
+    const violet = '#6a2fe0';
     const teal = '#2bc2b7';
 
     function build() {