fix: 🐛 focus le premier lien lors de l'ouverture du breadcrumb

Author: vincentlaine

src/components/DsfrBreadcrumb/DsfrBreadcrumb.vue

@@ -42,7 +42,7 @@ watch(expanded, (newValue, oldValue) => {
     :aria-label="navigationLabel"
   >
     <button
-      v-show="!expanded"
+      v-if="!expanded"
       class="fr-breadcrumb__button"
       :aria-expanded="expanded"
       :aria-controls="breadcrumbId"

src/composables/useCollapsable.ts

@@ -56,6 +56,8 @@ export const useCollapsable = () => {
     collapsing.value = false
     if (collapse.value && expanded === false) {
       collapse.value.style.removeProperty('--collapse-max-height')
+    } else if (collapse.value) {
+      collapse.value.querySelector('a')?.focus()
     }
   }