refactor: 升级tailwindcss至v4版本，带来更快的构建速度、更简化的安装和配置、提供专属vite插件 (#1203)

postcss.config.js

@@ -3,10 +3,6 @@
 /** @type {import('postcss-load-config').Config} */
 export default {
   plugins: {
-    "postcss-import": {},
-    "tailwindcss/nesting": {},
-    tailwindcss: {},
-    autoprefixer: {},
     ...(process.env.NODE_ENV === "production" ? { cssnano: {} } : {})
   }
 };