fix(frontend): 菜单点击偶发无响应三处根因——①路由懒加载chunk失败被静默吞掉(新增onError自动整页重载+保险丝防循环) ②首页入口被权限接口阻塞(改乐观显示+缓存TTL10分钟+超时30s→8s) ③菜单hover预取目标页chunk(工具卡片/工作流步骤/顶部导航)

frontend-vue/src/pages/brand/components/BrandTopBar.vue

@@ -13,7 +13,7 @@
         <div class="nav-section-title">{{ group.label }}</div>
         <div class="nav-section-items">
           <template v-for="item in group.items" :key="item.key">
-            <router-link v-if="item.href" :to="item.href" class="nav-item" :class="{ active: active === item.key }">
+            <router-link v-if="item.href" :to="item.href" class="nav-item" :class="{ active: active === item.key }" @mouseenter="onNavItemHover(item.href)">
               {{ item.label }}
             </router-link>
             <span v-else class="nav-item disabled" :class="{ active: active === item.key }">
@@ -36,7 +36,11 @@ import { computed, onMounted, ref } from 'vue'
 
 import BrandApiSecretSettingsButton from '@/pages/brand/components/BrandApiSecretSettingsButton.vue'
 import { getCurrentUserAppColumnKeys } from '@/shared/api/permission'
+import { prefetchRouteChunk } from '@/shared/route-prefetch'
 import DownloadProgressPanel from '@/shared/components/DownloadProgressPanel.vue'
+import { useRouter } from 'vue-router'
+
+const router = useRouter()
 
 type ActiveNavKey =
   | 'brand'
@@ -160,6 +164,11 @@ onMounted(async () => {
     allowedColumnKeys.value = []
   }
 })
+
+/** 导航项 hover 预取目标页 chunk：弱网下点击跳转不再等 chunk 下载 */
+function onNavItemHover(href?: string) {
+  prefetchRouteChunk(router, href)
+}
 </script>
 
 <style scoped>