Hover Card 基础原型
Base Hover Card 由 Root、Trigger 与 Content 组成。Root 支持受控/非受控 open、openDelay、closeDelay 与 openChange；Content 使用 asOverlay 和 asTransition，离场完成后才 detach。当前定位 API 覆盖 side 与 align，portal、碰撞检测、Arrow、forceMount 和数值 offset 暂不属于 Base 保证。
<wc-base-hover-card-root class="relative inline-flex items-start">
<wc-base-hover-card-trigger class="cursor-pointer rounded border px-3 py-1.5">
Hover me
</wc-base-hover-card-trigger>
<wc-base-hover-card-content class="w-72 rounded border bg-white p-3 shadow">
Base hover-card content. Pointer and focus intent use cancellable delays.
</wc-base-hover-card-content>
</wc-base-hover-card-root>