primevue-mirror/plugins/appState.js

const $appState = {
    install: (Vue, options) => {
        Vue.config.globalProperties.$appState = reactive({ 
            theme: 'lara-light-blue', 
            darkTheme: false, 
            codeSandbox: false, 
            sourceType: 'options-api', 
            newsActive: true, 
            announcement: {},
            storageKey: 'primevue'
        });
    }
};

export default defineNuxtPlugin((nuxtApp) => {
    nuxtApp.vueApp.use($appState);
});