fix(favorites): adjust favorite button visibility and functionality

- removed favorite button from Discover cards

- added call button for taxis in Favorites view

- added favorite button in Shuttle details

- added Shuttles category in Favorites view

frontend/src/views/transporte/ShuttleDetalle.vue

@@ -7,6 +7,7 @@ import { getImageUrl } from '@/utils/imageUrl'
 import { analyticsService } from '@/services/analyticsService'
 import { useI18n } from 'vue-i18n'
 import LoadingBranded from '@/components/common/LoadingBranded.vue'
+import FavoriteButton from '@/components/FavoriteButton.vue'
 
 const route = useRoute()
 const router = useRouter()
@@ -73,6 +74,13 @@ const getTripTypeLabel = (type: string) => {
       <h1 class="font-bold text-[var(--text-primary)] text-lg truncate flex-1">
         {{ shuttle?.company_name || t('shuttle.detailTitle') }}
       </h1>
+      <FavoriteButton
+        v-if="shuttle"
+        item-type="shuttle"
+        :item-id="shuttle.id"
+        :item-name="shuttle.company_name || shuttle.origin + ' - ' + shuttle.destination"
+        :item-image="shuttle.image_url || undefined"
+      />
     </div>
 
     <!-- Loading -->