refactor: improve SelectMenu implementation with object binding

- Change from ID-based selection to full object binding
- Add custom label templates to display proper text
- Simplify computed properties and watchers
- Improve user experience with proper label display

nuxt4-app/app/pages/explorer.vue

@@ -15,34 +15,40 @@
         <!-- Database Selector -->
         <UFieldGroup label="Base de datos">
           <USelectMenu
-            v-model="selectedDatabaseId"
-            :options="databaseOptions"
+            v-model="selectedDatabase"
+            :options="databases"
             placeholder="Seleccionar base de datos"
             :loading="loadingDatabases"
             :disabled="loadingDatabases"
-            value-attribute="value"
-            option-attribute="label"
-          />
+            option-attribute="name"
+          >
+            <template #label>
+              {{ selectedDatabase?.name || 'Seleccionar base de datos' }}
+            </template>
+          </USelectMenu>
         </UFieldGroup>
 
         <!-- Table Selector -->
-        <UFieldGroup label="Tabla" v-if="selectedDatabaseId">
+        <UFieldGroup label="Tabla" v-if="selectedDatabase">
           <USelectMenu
-            v-model="selectedTableId"
-            :options="tableOptions"
+            v-model="selectedTable"
+            :options="tables"
             placeholder="Seleccionar tabla"
             :loading="loadingTables"
-            :disabled="loadingTables || !selectedDatabaseId"
-            value-attribute="value"
-            option-attribute="label"
-          />
+            :disabled="loadingTables || !selectedDatabase"
+            option-attribute="name"
+          >
+            <template #label>
+              {{ selectedTable?.display_name || selectedTable?.name || 'Seleccionar tabla' }}
+            </template>
+          </USelectMenu>
         </UFieldGroup>
 
         <!-- Load Data Button -->
         <UButton
-          v-if="selectedTableId"
+          v-if="selectedTable"
           :loading="loadingData"
-          :disabled="!selectedTableId"
+          :disabled="!selectedTable"
           @click="loadTableData"
           color="primary"
           icon="i-lucide-refresh-cw"
@@ -147,7 +153,7 @@
     </UCard>
 
     <!-- Empty State -->
-    <UCard v-else-if="selectedTableId" class="brand-card border border-transparent">
+    <UCard v-else-if="selectedTable" class="brand-card border border-transparent">
       <div class="py-10 text-center text-sm text-[var(--brand-text-muted)]">
         <UIcon name="i-lucide-inbox" class="mx-auto mb-4 size-12 text-[var(--brand-text-muted)]" />
         <h3 class="text-lg font-semibold text-[var(--brand-text)] mb-2">No hay datos disponibles</h3>
@@ -175,8 +181,8 @@ definePageMeta({
 })
 
 // State
-const selectedDatabaseId = ref<number | null>(null)
-const selectedTableId = ref<number | null>(null)
+const selectedDatabase = ref<any | null>(null)
+const selectedTable = ref<any | null>(null)
 const loadingDatabases = ref(false)
 const loadingTables = ref(false)
 const loadingData = ref(false)
@@ -190,23 +196,11 @@ const tableData = ref<any[]>([])
 const visibleColumns = ref<string[]>([])
 
 // Computed
-const databaseOptions = computed(() => {
-  return databases.value.map(db => ({
-    label: db.name,
-    value: db.id
-  }))
-})
-
-const tableOptions = computed(() => {
-  return tables.value.map(table => ({
-    label: `${table.display_name || table.name} (${table.row_count || 0} registros)`,
-    value: table.id
-  }))
-})
+const selectedDatabaseId = computed(() => selectedDatabase.value?.id)
+const selectedTableId = computed(() => selectedTable.value?.id)
 
 const selectedTableName = computed(() => {
-  const table = tables.value.find(t => t.id === selectedTableId.value)
-  return table ? (table.display_name || table.name) : ''
+  return selectedTable.value ? (selectedTable.value.display_name || selectedTable.value.name) : ''
 })
 
 const tableColumns = computed(() => {
@@ -252,7 +246,7 @@ async function loadDatabases() {
 
     // Auto-select first database
     if (databases.value.length > 0) {
-      selectedDatabaseId.value = databases.value[0].id
+      selectedDatabase.value = databases.value[0]
     }
   } catch (err: any) {
     error.value = `Error al cargar bases de datos: ${err.message || 'Error desconocido'}`
@@ -263,15 +257,15 @@ async function loadDatabases() {
 }
 
 async function loadTables() {
-  if (!selectedDatabaseId.value) return
+  if (!selectedDatabase.value) return
 
   loadingTables.value = true
   error.value = null
-  selectedTableId.value = null
+  selectedTable.value = null
   tableData.value = []
 
   try {
-    const response = await $fetch(`/api/metabase/tables/${selectedDatabaseId.value}`)
+    const response = await $fetch(`/api/metabase/tables/${selectedDatabase.value.id}`)
     const metadata = response as any
 
     // Metabase returns tables in the 'tables' property
@@ -339,7 +333,7 @@ function toggleColumn(columnKey: string) {
 }
 
 // Watchers
-watch(selectedDatabaseId, () => {
+watch(selectedDatabase, () => {
   loadTables()
 })