feat(topup): hide subscription plans card when no plans available

web/src/components/topup/index.jsx

@@ -734,7 +734,8 @@ const TopUp = () => {
 
       {/* 主布局区域 */}
       <div className='grid grid-cols-1 lg:grid-cols-12 gap-6'>
-        {/* 左侧 - 订阅套餐 */}
+        {/* 左侧 - 订阅套餐（无套餐时隐藏整块卡片） */}
+        {(subscriptionLoading || subscriptionPlans.length > 0) && (
           <div className='lg:col-span-7'>
             <SubscriptionPlansCard
               t={t}
@@ -751,9 +752,16 @@ const TopUp = () => {
               reloadSubscriptionSelf={getSubscriptionSelf}
             />
           </div>
+        )}
 
         {/* 右侧 - 账户充值 + 邀请奖励 */}
-        <div className='lg:col-span-5 flex flex-col gap-6'>
+        <div
+          className={
+            subscriptionLoading || subscriptionPlans.length > 0
+              ? 'lg:col-span-5 flex flex-col gap-6'
+              : 'lg:col-span-12 flex flex-col gap-6'
+          }
+        >
           <RechargeCard
             t={t}
             enableOnlineTopUp={enableOnlineTopUp}