修改速度栏样式

lib/video_speed.dart

@@ -18,7 +18,7 @@ class VideoSpeedItemStyle {
   VideoSpeedItemStyle({
     Color? backgroundColor,
     this.itemSize = const Size(45, 30),
-    this.padding = const EdgeInsets.symmetric(vertical: 2.0, horizontal: 4.0),
+    this.padding = EdgeInsets.zero,
     this.margin = EdgeInsets.zero,
     this.radius = const BorderRadius.all(Radius.circular(8.0)),
     this.textStyle = const TextStyle(

lib/widget/video_speed_bar.dart

@@ -21,7 +21,7 @@ class VideoSpeedBar extends StatelessWidget {
       offstage: hidden,
       child: Align(
         child: Row(
-          mainAxisAlignment: MainAxisAlignment.center,
+          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
           children: buildItems(),
         ),
       ),