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

package.json

@@ -23,7 +23,6 @@
     "@elysiajs/eden": "^1.4.5",
     "@ionic/vue": "^8.7.11",
     "@ionic/vue-router": "^8.7.11",
-    "@nuxt/ui": "^4.2.1",
     "@riwa/api-types": "http://192.168.1.36:9527/api/riwa-api-types-0.0.6.tgz",
     "@tailwindcss/vite": "^4.1.18",
     "@vueuse/core": "^14.1.0",