调整网格调整，修正头部head数据传输逻辑

xusd

2024-09-16 a09205214e5cb6803563cb06c6d9f58d68916b73

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<view class="van-count-down">
  <slot wx:if="{{ useSlot }}"/>
  <block wx:else>{{ formattedTime }}</block>
</view>