chore: Claude Code 설정·디자인 레퍼런스·포털 로고 추가

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

public/logo.svg

@@ -0,0 +1,12 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32" role="img" aria-label="AI DEV">
+  <defs>
+    <linearGradient id="aidev" x1="0" y1="0" x2="32" y2="32" gradientUnits="userSpaceOnUse">
+      <stop offset="0" stop-color="#3b82f6"/>
+      <stop offset="1" stop-color="#6366f1"/>
+    </linearGradient>
+  </defs>
+  <rect width="32" height="32" rx="8" fill="url(#aidev)"/>
+  <path d="M12.5 11 L7.5 16 L12.5 21" fill="none" stroke="#fff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M19.5 11 L24.5 16 L19.5 21" fill="none" stroke="#fff" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+  <line x1="17.4" y1="9.5" x2="14.6" y2="22.5" stroke="#fff" stroke-width="2" stroke-linecap="round"/>
+</svg>