EmailBill/Web/src/App.vue

<template>
  <van-config-provider :theme="theme">
    <RouterView />
    <van-tabbar v-model="active" v-show="showTabbar" safe-area-inset-bottom>
      <van-tabbar-item icon="notes-o" to="/calendar">
        日历
      </van-tabbar-item>
      <van-tabbar-item icon="balance-list-o" to="/" @click="handleTabClick('/')">
        账单
      </van-tabbar-item>
      <van-tabbar-item icon="records-o" to="/email" @click="handleTabClick('/email')">
        邮件
      </van-tabbar-item>
      <van-tabbar-item icon="setting-o" to="/setting">
        设置
      </van-tabbar-item>
    </van-tabbar>
  </van-config-provider>
</template>

<script setup>
import { RouterView, useRoute } from 'vue-router'
import { ref, onMounted, onUnmounted, computed } from 'vue'

const route = useRoute()

// 根据路由判断是否显示Tabbar
const showTabbar = computed(() => {
  return route.path !== '/login'
})

const active = ref(0)
const theme = ref('light')

// 检测系统深色模式
const updateTheme = () => {
  const isDark = window.matchMedia('(prefers-color-scheme: dark)').matches
  theme.value = isDark ? 'dark' : 'light'
}

// 监听系统主题变化
let mediaQuery
onMounted(() => {
  updateTheme()
  mediaQuery = window.matchMedia('(prefers-color-scheme: dark)')
  mediaQuery.addEventListener('change', updateTheme)
})

onUnmounted(() => {
  if (mediaQuery) {
    mediaQuery.removeEventListener('change', updateTheme)
  }
})

// 处理tab点击，如果点击当前页面则滚动到顶部
const handleTabClick = (path) => {
  if (route.path === path) {
    window.scrollTo({ top: 0, behavior: 'smooth' })
  }
}

</script>

<style scoped>
/* 仅在移动设备上添加底部安全区域适配 */
@media only screen and (max-width: 768px) {
  :deep(.van-tabbar) {
    /* 为小白条添加额外高度 */
    padding-bottom: 10px;
  }
}
</style>