feat: replace obsolete spinners with branded UI loading component

frontend/src/views/SchedulesView.vue

@@ -6,6 +6,7 @@ import { formatTo12Hour } from '@/utils/timeFormatter'
 import { analyticsService } from '@/services/analyticsService'
 import { useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
+import LoadingBranded from '@/components/common/LoadingBranded.vue'
 
 const route = useRoute()
 const { t } = useI18n()
@@ -295,8 +296,7 @@ onUnmounted(() => {
 
       <!-- Loading -->
       <div v-if="scheduleStore.isLoading" class="state-center">
-        <div class="spinner"></div>
-        <p>{{ t('schedules.loading') || 'Cargando horarios...' }}</p>
+        <LoadingBranded :message="t('schedules.loading') || 'Cargando horarios...'" icon="schedule" />
       </div>
 
       <!-- Sin resultados en el filtro -->