fix(flutter): 简介灰字统一并透明暂停按钮

lib/pages/player/widgets/player_center_toggle.dart

@@ -22,13 +22,9 @@ class PlayerCenterToggle extends StatelessWidget {
       label: playing ? 'Pause' : 'Play',
       child: GestureDetector(
         onTap: onTap,
-        child: Container(
+        child: SizedBox(
           width: 52,
           height: 52,
-          decoration: const BoxDecoration(
-            color: AppColors.blue,
-            shape: BoxShape.circle,
-          ),
           child: Icon(
             playing ? Icons.pause_rounded : Icons.play_arrow_rounded,
             color: AppColors.onPrimary,