feat: 初始化 Astro 项目与工具链（astro5/vitest/zod3/设计token/env）

vitest.config.ts

@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['tests/**/*.test.ts'],
+  },
+});