feat!: rewrite frontend in Vue 3 with Pinia, DaisyUI, vite-plugin-pwa

Migrates every component from class-based vue-property-decorator to
<script setup> + Composition API. Replaces Vuex 3 + vuex-class with a
single Pinia store (persisted via pinia-plugin-persistedstate). Swaps
Bulma + bulma-{checkradio,switch,pricingtable} for DaisyUI 5 utilities
on Tailwind 4. Replaces register-service-worker with vite-plugin-pwa
(workbox, skipWaiting/clientsClaim preserved).

Plugins replaced:
- vue-class-component / vue-property-decorator -> <script setup>
- vuex / vuex-class / vuex-persist -> pinia + persistedstate
- vue-i18n 8 -> vue-i18n 11 (composition mode, legacy: false)
- vue-click-outside -> @vueuse/core onClickOutside
- @xkeshi/vue-qrcode -> qrcode.vue
- vue-currency-input 1 -> vue-currency-input 3 (composable wrapper)
- bus-event (Vue instance) -> mitt
- Vue filters -> plain functions imported per component

BREAKING: drops Stripe / pricing entirely (Payment, PricingTable,
/pricing route, vue-stripe-checkout, bulma-pricingtable).

Clears unused Cypress and Jest test scaffolding; leaves a Vitest
harness behind for future tests.

src/main.ts

@@ -1,37 +1,30 @@
-import Vue from 'vue'
-import VueI18n from 'vue-i18n'
+import { createApp } from 'vue'
+import { createPinia } from 'pinia'
+import piniaPluginPersistedstate from 'pinia-plugin-persistedstate'
 import App from './App.vue'
 import router from './router'
-import store from './store'
-import './styles/index.scss'
-import 'bulma-checkradio'
-import './registerServiceWorker'
-import filters from './utils/filters'
-import './utils/icons'
-import messages from './messages'
+import i18n from './i18n'
+import { useUserStore } from './stores/user'
+import { registerIcons } from './utils/icons'
+import couchService from './services/CouchService'
+import './styles/index.css'
 
-Vue.use(VueI18n)
+const bootstrap = async () => {
+  const app = createApp(App)
 
-Vue.config.productionTip = false
+  const pinia = createPinia()
+  pinia.use(piniaPluginPersistedstate)
+  app.use(pinia)
 
-for (const filter of Object.keys(filters)) {
-  Vue.filter(filter, filters[filter])
+  app.use(router)
+  app.use(i18n)
+  registerIcons(app)
+
+  const userStore = useUserStore()
+  couchService.start(() => userStore.publicAccountIds)
+  await userStore.retrieveUser()
+
+  app.mount('#app')
 }
 
-const i18n = new VueI18n({
-  locale: 'fr',
-  fallbackLocale: 'en',
-  messages
-})
-
-const app = async () => {
-  await store.dispatch('retrieveUser')
-  new Vue({
-    router,
-    store,
-    i18n,
-    render: (h) => h(App)
-  }).$mount('#app')
-}
-
-app()
+bootstrap()