duanju_manage/resources/admin/layout/components/header/theme.vue

<template>
  <div class="w-10 h-10 grid place-items-center rounded-full mt-3 hover:cursor-pointer">
    <Icon name="moon" @click="changeTheme()" v-if="isDark" />
    <Icon name="sun" @click="changeTheme()" v-else />
  </div>
</template>

<script setup lang="ts">
import { useDark, useToggle } from '@vueuse/core'
import { useAppStore } from '/admin/stores/modules/app'
import { unref } from 'vue'

const appStore = useAppStore()
const isDark = useDark()

const toggleDark = useToggle(isDark)

function changeTheme() {
  appStore.setDarkMode(!unref(isDark))
  toggleDark()
}
</script>