refactor: 将各个页面的面包屑导航提取为单独组件AppBreadcrumb

app/components/shared/AppBreadcrumb.vue

@@ -0,0 +1,21 @@
+<template>
+  <el-breadcrumb separator="/">
+    <el-breadcrumb-item
+      v-for="(item, index) in items"
+      :key="index"
+      class="text-md opacity-50"
+    >
+      <NuxtLink v-if="item.to" :to="item.to">{{ item.label }}</NuxtLink>
+      <span v-else>{{ item.label }}</span>
+    </el-breadcrumb-item>
+  </el-breadcrumb>
+</template>
+
+<script setup lang="ts">
+  defineProps({
+    items: {
+      type: Array as () => Array<{ label: string; to?: string }>,
+      required: true,
+    },
+  });
+</script>