• 缩短氛围背景的画面更新间隔，切换视频时减少黑屏闪烁
• 缩短媒体库启动等待，优先展示缓存内容并在后台增量同步更新

English Version

• Shorten ambience background update intervals to reduce black flashes when switching videos
• Shorten media library startup waits, showing cached content first and applying incremental updates in the background