add --art-border-radius

packages/artplayer/src/style/progress.less

@@ -88,7 +88,7 @@
                     padding: 3px 5px;
                     line-height: 1;
                     font-size: 12px;
-                    border-radius: 3px;
+                    border-radius: var(--art-border-radius);
                     white-space: nowrap;
                     background-color: var(--art-tip-background);
                 }
@@ -106,7 +106,7 @@
             position: absolute;
             bottom: 10px;
             left: 0;
-            border-radius: 3px;
+            border-radius: var(--art-border-radius);
             pointer-events: none;
             background-color: var(--art-widget-background);
             box-shadow: 0 1px 3px 0 rgb(0 0 0 / 0.2), 0 1px 2px -1px rgb(0 0 0 / 0.2);