🎨 Palette: 修复手势控制中状态不同步的 UX 缺陷

[Shangjin-Xiao]

💡 内容
修复了 VideoSurface 组件中播放/暂停切换手势（Modifier.pointerInput(Unit)）由于捕获过时的 lambda 和状态导致的行为异常。将 onTogglePlayPause 和 exoPlayer 包装在 rememberUpdatedState 中。

🎯 原因
Jetpack Compose 的 pointerInput(Unit) 在重组时不会重新启动其协程。如果在其中直接引用外部传入的参数或状态，这些引用在第一次组合后就会变成“陈旧的闭包”。这会导致用户点击视频画面时，可能调用的是旧的 onTogglePlayPause 实例或读取到错误的 isPlaying 状态。

📸 效果
用户点击视频画面切换播放状态时，响应更加稳定，不再出现因状态不同步导致的无效点击或播放器状态紊乱。

♿ 无障碍
通过提升手势交互的稳定性和预期性，为所有用户提供更顺畅的操作体验。

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PR created automatically by Jules for task 6936029065424382362 started by @Shangjin-Xiao

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