v0.9.4 — spacing between the action bar and the first card

Extra vertical spacing between the action bar and the first segment card.

• The segment list now keeps 14px of top padding, so the selected card and the right-aligned hover groups no longer look cramped at that gap.

增加按钮栏与第一张分段卡片之间的垂直间距。

• 分段列表顶部 padding 从 8px 调整为 14px；选中卡片与右对齐按钮组之间不再显得贴在一起。