fix: template v-for 的 key 移到 template 标签,修复编译报错

- Vue 要求 <template v-for> 的 key 放在 template 标签上,而非内部元素

track-uniapp/src/pages/scan/components/FlowTree.vue

@@ -22,10 +22,9 @@
     <!-- 子任务：主线继续主干道(左对齐 + ↓连线)，分支(SPAWN 协助)缩进 -->
     <view v-if="node.child_tasks && node.child_tasks.length">
       <!-- 主线子任务：左边缘对齐，形成笔直主干道，之间用 ↓ 连线 -->
-      <template v-for="(child, i) in mainChildren">
-        <view :key="'arrow-' + child.id" v-if="i > 0" class="ft-flow-arrow">↓</view>
+      <template v-for="(child, i) in mainChildren" :key="'mc-' + child.id">
+        <view v-if="i > 0" class="ft-flow-arrow">↓</view>
         <FlowTree
-          :key="child.id"
           :node="child"
           :current-user="currentUser"
           :current-user-id="currentUserId"

track-uniapp/src/pages/scan/components/TreeCanvas.vue

@@ -17,10 +17,9 @@
     <scroll-view v-else scroll-y class="tree-scroll" :style="{ height: scrollHeight + 'px' }">
       <view class="tree-root">
         <!-- 递归纵向流转树：根级主线之间用 ↓ 连线，分支由 FlowTree 内部缩进 -->
-        <template v-for="(t, i) in product.task_tree">
-          <view :key="'arrow-' + i" v-if="i > 0" class="ft-flow-arrow">↓</view>
+        <template v-for="(t, i) in product.task_tree" :key="'rt-' + t.id">
+          <view v-if="i > 0" class="ft-flow-arrow">↓</view>
           <FlowTree
-            :key="t.id"
             :node="t"
             :current-user="currentUser"
             :current-user-id="currentUserId"