feat: Implement proper Three.js logo system with custom environment mapping

- Replace CDN-based Three.js with npm packages for reliable loading
- Add DRACO loader support for compressed GLB files
- Implement custom horizon gradient environment mapping
- Use exact material properties from reference logo.html (MeshPhysicalMaterial)
- Apply proper metallic sheen, clearcoat, and reflectivity settings
- Fix camera positioning and canvas sizing to prevent clipping
- Maintain square aspect ratio for consistent logo display
- Load user's mobius-ring.glb with fallback torus geometry

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

brand-assets/brand-style-guide-site/eslint.config.mjs

@@ -0,0 +1,25 @@
+import { dirname } from "path";
+import { fileURLToPath } from "url";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+});
+
+const eslintConfig = [
+  ...compat.extends("next/core-web-vitals", "next/typescript"),
+  {
+    ignores: [
+      "node_modules/**",
+      ".next/**",
+      "out/**",
+      "build/**",
+      "next-env.d.ts",
+    ],
+  },
+];
+
+export default eslintConfig;