fix: remove TaskTree refresh icon crash

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/hwlab-cloud-web/src/views/projects/TaskTreeView.vue

@@ -1,5 +1,4 @@
 <script setup lang="ts">
-import { RefreshCw } from "lucide-vue-next";
 import { computed, onMounted, ref, watch } from "vue";
 import { useRoute, useRouter } from "vue-router";
 import { tasktreeAPI, type TaskTreeGroup, type TaskTreeReport, type TaskTreeTask, type TaskTreeTimeline } from "@/api";
@@ -69,7 +68,7 @@ function statusLabel(status: string) { return ({ pending: "待处理", in_progre
 <template>
   <main class="tasktree-page" data-testid="tasktree-page">
     <PageCommandBar title="TaskTree" eyebrow="项目时间线" description="任务、时间节点与执行报告">
-      <template #actions><label class="tasktree-group-select"><span class="sr-only">Taskgroup</span><select :value="groupId" @change="selectGroup"><option v-for="group in groups" :key="group.id" :value="group.id">{{ group.name }}</option></select></label><button class="icon-button" type="button" title="刷新" :disabled="loading" @click="loadTimeline()"><RefreshCw :size="17" /></button></template>
+      <template #actions><label class="tasktree-group-select"><span class="sr-only">Taskgroup</span><select :value="groupId" @change="selectGroup"><option v-for="group in groups" :key="group.id" :value="group.id">{{ group.name }}</option></select></label><button class="icon-button" type="button" title="刷新" aria-label="刷新" :disabled="loading" @click="loadTimeline()"><span aria-hidden="true">↻</span></button></template>
     </PageCommandBar>
     <StatusStrip :items="statusItems" />
     <AsyncBoundary :state="asyncState" title="TaskTree 暂无任务" :message="error || '通过 CLI 创建 taskgroup 和任务后会显示在时间轴中。'" @retry="loadGroups">