diff --git a/nuxt4-app/app/assets/css/main.css b/nuxt4-app/app/assets/css/main.css
new file mode 100644
index 0000000..7c95c6f
--- /dev/null
+++ b/nuxt4-app/app/assets/css/main.css
@@ -0,0 +1,2 @@
+@import "tailwindcss";
+@import "@nuxt/ui";
diff --git a/nuxt4-app/pages/index.vue b/nuxt4-app/app/pages/index.vue
similarity index 90%
rename from nuxt4-app/pages/index.vue
rename to nuxt4-app/app/pages/index.vue
index 5c80d44..4233baa 100644
--- a/nuxt4-app/pages/index.vue
+++ b/nuxt4-app/app/pages/index.vue
@@ -12,63 +12,52 @@
 
       <form class="flex flex-col gap-6" @submit.prevent="executeRequest">
         <div class="grid gap-4 lg:grid-cols-4">
-          <UFormGroup label="Tipo de consulta" name="type">
-            <USelectMenu
-              v-model="request.type"
-              :options="requestTypeOptions"
-              option-attribute="label"
-              value-attribute="value"
-            />
-          </UFormGroup>
+          <UFormField label="Tipo de consulta" name="type">
+            <USelectMenu v-model="request.type" :items="requestTypeOptions" value-key="value" />
+          </UFormField>
 
-          <UFormGroup label="Ámbito" name="scope">
-            <USelectMenu
-              v-model="request.scope"
-              :options="scopeOptions"
-              option-attribute="label"
-              value-attribute="value"
-            />
-          </UFormGroup>
+          <UFormField label="Ámbito" name="scope">
+            <USelectMenu v-model="request.scope" :items="scopeOptions" value-key="value" />
+          </UFormField>
 
-          <UFormGroup v-if="requiresTable" label="Tabla" name="table">
+          <UFormField v-if="requiresTable" label="Tabla" name="table">
             <USelectMenu
               v-model="request.table"
-              :options="tableOptions"
-              option-attribute="label"
-              value-attribute="value"
+              :items="tableOptions"
+              value-key="value"
               placeholder="Selecciona una tabla"
             />
-          </UFormGroup>
+          </UFormField>
 
-          <UFormGroup v-if="showsLimit" label="Límite" name="limit">
+          <UFormField v-if="showsLimit" label="Límite" name="limit">
             <UInput v-model.number="request.limit" type="number" min="1" max="500" />
-          </UFormGroup>
+          </UFormField>
 
-          <UFormGroup v-if="requiresRecordId" label="ID del registro" name="recordId">
+          <UFormField v-if="requiresRecordId" label="ID del registro" name="recordId">
             <UInput v-model="request.recordId" placeholder="Introduce el ID exacto" />
-          </UFormGroup>
+          </UFormField>
 
-          <UFormGroup v-if="showsIdFilter" label="Filtrar por ID" name="filterId">
+          <UFormField v-if="showsIdFilter" label="Filtrar por ID" name="filterId">
             <UInput v-model="request.filterId" placeholder="Opcional" />
-          </UFormGroup>
+          </UFormField>
 
-          <UFormGroup v-if="showsDateFilters" label="Fecha desde" name="createdFrom">
+          <UFormField v-if="showsDateFilters" label="Fecha desde" name="createdFrom">
             <UInput v-model="request.createdFrom" type="date" />
-          </UFormGroup>
+          </UFormField>
 
-          <UFormGroup v-if="showsDateFilters" label="Fecha hasta" name="createdTo">
+          <UFormField v-if="showsDateFilters" label="Fecha hasta" name="createdTo">
             <UInput v-model="request.createdTo" type="date" />
-          </UFormGroup>
+          </UFormField>
         </div>
 
         <div v-if="showQueryJson" class="space-y-2">
-          <UFormGroup label="Consulta avanzada (JSON)">
+          <UFormField label="Consulta avanzada (JSON)" name="queryJson">
             <UTextarea
               v-model="request.queryJson"
               :rows="5"
               placeholder='{ "filters": [{ "field": "estado", "operator": "eq", "value": "activo" }] }'
             />
-          </UFormGroup>
+          </UFormField>
           <p v-if="queryState.error" class="text-sm text-red-300">{{ queryState.error }}</p>
           <p v-else-if="queryState.encoded" class="text-xs text-slate-400">
             Segmento codificado: <code class="rounded bg-slate-800 px-2 py-1">{{ queryState.encoded }}</code>
@@ -88,7 +77,7 @@
         </UAlert>
 
         <div class="flex justify-end gap-2">
-          <UButton color="gray" variant="soft" @click="resetForm" :disabled="loading">
+          <UButton color="neutral" variant="soft" @click="resetForm" :disabled="loading">
             Limpiar
           </UButton>
           <UButton type="submit" :loading="loading">
@@ -199,11 +188,11 @@
               </UBadge>
             </template>
             <template v-else-if="dataStatsCollection.length">
-              <UBadge v-for="item in dataStatsCollection" :key="item.table" color="gray">
+              <UBadge v-for="item in dataStatsCollection" :key="item.table" color="neutral">
                 {{ item.table }}: {{ item.count }} registros (límite {{ item.limit ?? 's/d' }})
               </UBadge>
             </template>
-            <UBadge v-else-if="tableData.length" color="gray">
+            <UBadge v-else-if="tableData.length" color="neutral">
               {{ tableData.length }} registros visibles
             </UBadge>
           </div>
@@ -211,7 +200,8 @@
       </template>
 
       <div v-if="loading" class="flex items-center justify-center py-10">
-        <ULoadingIndicator size="lg" />
+        <span class="inline-flex h-8 w-8 animate-spin rounded-full border-2 border-slate-400 border-t-transparent align-middle" aria-hidden="true" />
+        <span class="sr-only">Cargando…</span>
       </div>
       <div v-else-if="!hasDataResponse" class="py-10 text-center text-sm text-slate-400">
         Ejecuta una consulta de datos para ver resultados aquí.
@@ -250,6 +240,7 @@
 
 <script setup lang="ts">
 import { computed, onMounted, reactive, ref, watch } from 'vue'
+import { useRequestFetch } from '#imports'
 
 type RequestType = 'data' | 'metadata'
 type MetadataScope = 'all' | 'table' | 'record'
@@ -279,6 +270,11 @@ const dataScopeOptions: Option<DataScope>[] = [
   { label: 'Consulta avanzada', value: 'query' }
 ]
 
+const DEFAULT_METADATA_SCOPE: MetadataScope = 'all'
+const DEFAULT_DATA_SCOPE: DataScope = 'table'
+
+const requestFetch = useRequestFetch()
+
 const request = reactive<{
   type: RequestType
   scope: RequestScope
@@ -292,7 +288,7 @@ const request = reactive<{
 }>(
   {
     type: 'data',
-    scope: 'table',
+    scope: DEFAULT_DATA_SCOPE,
     table: '',
     recordId: '',
     filterId: '',
@@ -410,7 +406,7 @@ onMounted(async () => {
 watch(
   () => request.type,
   (type) => {
-    request.scope = type === 'metadata' ? metadataScopeOptions[0].value : dataScopeOptions[0].value
+    request.scope = type === 'metadata' ? DEFAULT_METADATA_SCOPE : DEFAULT_DATA_SCOPE
     request.recordId = ''
     request.filterId = ''
     request.createdFrom = ''
@@ -429,8 +425,11 @@ watch(
   () => {
     if (!requiresTable.value) {
       request.table = ''
-    } else if (!request.table && availableMetadata.value.length > 0) {
-      request.table = availableMetadata.value[0].table
+    } else if (!request.table) {
+      const defaultTable = availableMetadata.value[0]?.table
+      if (defaultTable) {
+        request.table = defaultTable
+      }
     }
 
     if (!requiresRecordId.value) {
@@ -450,11 +449,14 @@ watch(
 
 async function loadAvailableMetadata() {
   try {
-    const metadata = await $fetch('/api/metadata')
+    const metadata = await requestFetch('/api/metadata')
     if (Array.isArray(metadata)) {
       availableMetadata.value = metadata
-      if (!request.table && metadata.length > 0 && requiresTable.value) {
-        request.table = metadata[0].table
+      if (!request.table && requiresTable.value) {
+        const firstTable = metadata[0]?.table
+        if (firstTable) {
+          request.table = firstTable
+        }
       }
     }
   } catch (error) {
@@ -496,7 +498,7 @@ function clearResults() {
 }
 
 function resetForm() {
-  request.scope = request.type === 'metadata' ? metadataScopeOptions[0].value : dataScopeOptions[0].value
+  request.scope = request.type === 'metadata' ? DEFAULT_METADATA_SCOPE : DEFAULT_DATA_SCOPE
   request.table = availableMetadata.value[0]?.table ?? ''
   request.recordId = ''
   request.filterId = ''
@@ -595,7 +597,7 @@ async function executeRequest() {
   errorMessage.value = null
 
   try {
-    const response = await $fetch(requestConfig.url, {
+    const response = await requestFetch(requestConfig.url, {
       query: requestConfig.query
     })
 
diff --git a/nuxt4-app/nuxt.config.ts b/nuxt4-app/nuxt.config.ts
index 44d09c3..e4dc978 100644
--- a/nuxt4-app/nuxt.config.ts
+++ b/nuxt4-app/nuxt.config.ts
@@ -3,6 +3,7 @@ export default defineNuxtConfig({
   ssr: false,
   compatibilityDate: '2025-07-15',
   devtools: { enabled: true },
+  css: ['~/assets/css/main.css'],
   modules: ['@nuxt/image', '@nuxt/ui', '@nuxt/test-utils'],
   runtimeConfig: {
     supabase: {
@@ -11,4 +12,4 @@ export default defineNuxtConfig({
         process.env.SUPABASE_SERVICE_ROLE_KEY || process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY
     }
   }
-})
+})
\ No newline at end of file