更新依赖项和配置以支持新版本的pnpm，优化PostCSS和Tailwind配置，添加延迟输入功能到EffectsPage，提升用户体验

postcss.legacy.config.cjs

@@ -1,6 +1,14 @@
+/**
+ * Legacy PostCSS is configured inline in vite.legacy.config.ts (same as x8).
+ * This file is kept for reference / tooling that expects a postcss config path.
+ */
+const path = require("node:path");
 const tailwindcss3 = require("tailwindcss3");
 const autoprefixer = require("autoprefixer");
 
 module.exports = {
-  plugins: [tailwindcss3({ config: "./tailwind.legacy.config.cjs" }), autoprefixer()],
+  plugins: [
+    tailwindcss3({ config: path.join(__dirname, "tailwind.legacy.config.cjs") }),
+    autoprefixer(),
+  ],
 };