mod: 无障碍语义适配

lib/plugin/pl_player/widgets/common_btn.dart

@@ -3,10 +3,12 @@ import 'package:flutter/material.dart';
 class ComBtn extends StatelessWidget {
   final Widget? icon;
   final Function? fuc;
+  final String tooltip;
 
   const ComBtn({
     this.icon,
     this.fuc,
+    required this.tooltip,
     super.key,
   });
 
@@ -16,6 +18,7 @@ class ComBtn extends StatelessWidget {
       width: 34,
       height: 34,
       child: IconButton(
+        tooltip: tooltip,
         style: ButtonStyle(
           padding: MaterialStateProperty.all(EdgeInsets.zero),
         ),