fix: use $index in event args, drop unsupported swiper ref (build success)

src/pages/index/index.ux

@@ -1,12 +1,12 @@
 <template>
   <div class="page">
-    <swiper class="swiper" ref="swiper" index="{{currentIndex}}" indicator="false" loop="false"
+    <swiper class="swiper" index="{{currentIndex}}" indicator="false" loop="false"
             previousmargin="14px" nextmargin="14px" onchange="onSwipeChange">
       <!-- 左页：会话 -->
       <div class="page-item left-page">
         <text class="page-title">会话</text>
         <div class="session-list">
-          <div class="session-row" for="{{sessions}}" onclick="selectSession({{$index}})">
+          <div class="session-row" for="{{sessions}}" onclick="selectSession($index)">
             <text class="session-title">{{$item.title}}</text>
             <text class="session-dot" if="{{$item.running}}">●</text>
           </div>
@@ -94,10 +94,8 @@ export default {
   },
 
   goTo(index) {
+    // index 属性绑定已驱动 swiper 切换；此处主要同步 data
     this.currentIndex = index
-    if (this.$refs && this.$refs.swiper && this.$refs.swiper.swipeTo) {
-      this.$refs.swiper.swipeTo({ index })
-    }
   },
 
   selectSession(index) {