style: 切换分轨ui优化

src/view/plugins/toggleMusicSheet/choosePartName/index.module.less

@@ -30,9 +30,12 @@
   .picker {
     flex: 1;
     height: 100px;
+    display: flex;
+    align-items: center;
+    justify-content: center;
     :global {
       .van-picker__columns {
-        height: 100% !important;
+        //height: 80% !important;
       }
     }
   }