fix: resolve blank screen on return from external links

frontend/src/views/DiscoverView.vue

@@ -12,7 +12,7 @@ import AuthGuard from '@/components/common/AuthGuard.vue'
 const router = useRouter()
 const { t } = useI18n()
 const businesses  = ref<Business[]>([])
-const isLoading   = ref(true)
+const isLoading   = ref(false)
 const error       = ref<string | null>(null)
 const searchQuery = ref('')
 const selectedCategory = ref('Todas')
@@ -41,21 +41,28 @@ function catIcon(cat: string) {
   return CATEGORY_META[cat]?.icon ?? 'place'
 }
 
-async function loadBusinesses() {
-  isLoading.value = true
+async function loadBusinesses(silent = false) {
+  // Modo 'silencioso': si ya tenemos datos, no mostrar spinner — solo refrescar en fondo
+  if (!silent || businesses.value.length === 0) {
+    isLoading.value = true
+  }
   error.value = null
   try {
     businesses.value = await businessService.getAllBusinesses()
   } catch (e) {
     console.error('Error loading businesses:', e)
-    error.value = t('discover.error')
+    // Solo mostrar error si no hay datos previos
+    if (businesses.value.length === 0) {
+      error.value = t('discover.error')
+    }
   } finally {
     isLoading.value = false
   }
 }
 
 function handleRefocus() {
-  loadBusinesses()
+  // Recarga silenciosa: no congela la UI si ya hay datos visibles
+  loadBusinesses(true)
 }
 
 onMounted(() => {
@@ -179,7 +186,7 @@ function resetFilters() {
     <div v-else-if="error" class="state-center">
       <span class="material-icons" style="font-size: 3.5rem; color: #ef4444; opacity: 0.8; margin-bottom: 0.5rem;">error_outline</span>
       <p style="font-weight: 600; color: var(--text-secondary);">{{ error }}</p>
-      <button class="cta-btn" style="margin-top: 1rem;" @click="loadBusinesses">
+      <button class="cta-btn" style="margin-top: 1rem;" @click="loadBusinesses()">
         <span class="material-icons">refresh</span>
         {{ t('common.retry') }}
       </button>

frontend/src/views/MapView.vue

@@ -143,10 +143,28 @@ async function fetchData() {
   updateActiveUnits();
 }
 
-function handleRefocus() {
+async function handleRefocus() {
+  // Refrescar datos en fondo
   fetchData();
+
+  await nextTick();
+
   if (map.value) {
-    google.maps.event.trigger(map.value, 'resize');
+    // El mapa sigue vivo — solo redimensionar y actualizar
+    try {
+      google.maps.event.trigger(map.value, 'resize');
+    } catch (_) { /* ignorar si google no disponible */ }
+    updateActiveUnits();
+  } else {
+    // El mapa fue destruido por el browser al suspender la pestaña — reinicializar
+    console.log('SIBU | Mapa perdido tras refocus, reinicializando...');
+    if (isLoaded.value) {
+      await initializeMap();
+    } else {
+      const unwatch = watch(isLoaded, async (loaded) => {
+        if (loaded) { await initializeMap(); unwatch(); }
+      });
+    }
   }
 }
 
@@ -154,7 +172,7 @@ function handleRefocus() {
 onMounted(async () => {
   analyticsService.logEvent({ event_name: 'screen_view', properties: { screen_name: 'Map' } })
   window.addEventListener('app-refocus', handleRefocus);
-  
+
   await fetchData();
 
   const queryRouteId = router.currentRoute.value.query.routeId as string;
@@ -179,7 +197,6 @@ onMounted(async () => {
   unitFetchInterval.value = setInterval(updateActiveUnits, 15000);
   startCarousel();
 
-  // 🛰️ RESIZE FIX: Trigger map resize when app becomes visible again
   document.addEventListener('visibilitychange', handleVisibilityChange);
 });
 
@@ -192,8 +209,9 @@ onUnmounted(() => {
 
 function handleVisibilityChange() {
   if (document.visibilityState === 'visible' && map.value) {
-    console.log('SIBU | App visible, redimensionando mapa...');
-    google.maps.event.trigger(map.value, 'resize');
+    try {
+      google.maps.event.trigger(map.value, 'resize');
+    } catch (_) { /* ignorar */ }
     updateActiveUnits();
   }
 }

frontend/src/views/transporte/TaxisLocales.vue

@@ -23,7 +23,8 @@ function fetchData() {
 }
 
 function handleRefocus() {
-  fetchData()
+  // Recarga silenciosa: no congela la UI si ya hay datos
+  taxiStore.silentReload()
 }
 
 onMounted(async () => {

frontend/src/views/transporte/ViajesTuristicos.vue

@@ -34,7 +34,8 @@ function fetchData() {
 }
 
 function handleRefocus() {
-    fetchData()
+    // Recarga silenciosa: no congela la UI si ya hay datos
+    shuttleStore.silentReload()
 }
 
 onMounted(async () => {