style(VideoPlayer): 调整控制栏样式

- 移除了 control bar 类名中的 `bottom-0`，以修复控制栏在隐藏时仍然占据空间的问题- 优化了 control bar 的显示和隐藏动画，使其更加流畅

src/components/Option/VideoPlayer/index.tsx

@@ -348,7 +348,7 @@ const VideoPlayer = () => {
 
       {/* 控制栏 - 使用与原始HTML相同的类名和行为 */}
       <div
-        className={`absolute bottom-0 left-0 w-full bg-gradient-to-t from-black to-transparent p-4 transition-all duration-300 ease-in-out flex flex-col gap-2.5 ${showControls ? "bottom-0" : "-bottom-40"}`}>
+        className={`absolute left-0 w-full bg-gradient-to-t from-black to-transparent p-4 transition-all duration-300 ease-in-out flex flex-col gap-2.5 ${showControls ? "bottom-0" : "-bottom-40"}`}>
         <div className="flex items-center justify-end gap-2 cursor-pointer" onClick={handleEnded}>
           {<img src={logo} alt="logo" className="w-8" />}
           <h2 className="text-xl font-bold text-white dark:text-zinc-300 mr-3">