调整支付页面样式；移除 mdx 测试页面

src/components/composites/purchase/index.tsx

@@ -10,7 +10,7 @@ export default async function Purchase(props: PurchaseProps) {
   return (
     <div className="flex flex-col gap-4">
       <Tabs defaultValue="short" className="gap-4">
-        <TabsList className="w-full p-2 bg-white rounded-lg justify-center">
+        <TabsList className="w-full p-2 bg-white rounded-lg justify-start md:justify-center overflow-auto">
           <Tab value="short">短效动态</Tab>
           <Tab value="long">长效静态</Tab>
           <Tab value="fixed">固定套餐</Tab>