refactor: remove @nuxt/ui integration and update Vite configuration

- Removed @nuxt/ui plugin from main.ts and index.css
- Updated vite.config.ts to replace @nuxt/ui with unplugin-auto-import and unplugin-vue-components for better component auto-importing and resolution

src/main.ts

@@ -1,5 +1,4 @@
 import { IonicVue } from "@ionic/vue";
-import ui from "@nuxt/ui/vue-plugin";
 import { createPinia } from "pinia";
 import { createApp } from "vue";
 import App from "./App.vue";
@@ -45,8 +44,7 @@ const app = createApp(App)
   .use(IonicVue)
   .use(router)
   .use(pinia)
-  .use(i18n)
-  .use(ui);
+  .use(i18n);
 
 router.isReady().then(() => {
   app.mount("#app");

src/theme/index.css

@@ -1,2 +1 @@
 @import "tailwindcss";
-@import "@nuxt/ui";