fix: use items prop instead of options for USelectMenu

- Change :options to :items according to Nuxt UI documentation
- USelectMenu requires items prop for data binding
- Fixes dropdown rendering issue

nuxt4-app/app/pages/explorer.vue

@@ -16,7 +16,7 @@
         <UFieldGroup label="Base de datos">
           <USelectMenu
             v-model="selectedDatabase"
-            :options="databaseOptions"
+            :items="databaseOptions"
             placeholder="Seleccionar base de datos"
             :loading="loadingDatabases"
             :disabled="loadingDatabases"
@@ -27,7 +27,7 @@
         <UFieldGroup label="Tabla" v-if="selectedDatabase">
           <USelectMenu
             v-model="selectedTable"
-            :options="tableOptions"
+            :items="tableOptions"
             placeholder="Seleccionar tabla"
             :loading="loadingTables"
             :disabled="loadingTables || !selectedDatabase"