Fixed / 修复
- Scrolling long playlists could loop endlessly around the middle and never reach the bottom — caused by nested lazy stacks fighting over height estimation; list pages now use a plain outer container with lazy rows and fixed row heights (#3)
- The player bar and lyrics/queue panels now persist across page navigation instead of re-attaching per page (#4, contributed by @sld272)
- 长歌单滚动到中部时可能无限循环、无法到达底部的问题 —— 嵌套懒加载容器的高度估算互相干扰所致；列表页改为普通外层容器 + 懒加载行 + 固定行高（#3）
- 播放条与歌词/队列面板改为跨页面持久化，不再随页面切换重新挂载（#4，由 @sld272 贡献）