feat: 新增 design-lab——Vite MPA + Tailwind v4，设计系统可运行版（五页：目录/颜色/符号/组件/样例）

apps/design-lab/components.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>design-lab · components</title>
+  </head>
+  <body class="bg-paper text-ink">
+    <div id="root"></div>
+    <script type="module" src="/src/pages/components/main.tsx"></script>
+  </body>
+</html>