Restore previous focus when modal dialogs close.

frontend/src/components/RegistrationLinkModal.vue

@@ -49,6 +49,8 @@ const emit = defineEmits(['close', 'copied'])
 const linkUrl = ref(null)
 const expiresAt = ref(null)
 const actionsRow = ref(null)
+// Store the element that had focus before modal opened
+const previouslyFocusedElement = ref(null)
 
 async function generateLink() {
   try {
@@ -102,6 +104,8 @@ const handleActionsKeydown = (event) => {
 }
 
 onMounted(() => {
+  // Save currently focused element before modal takes focus
+  previouslyFocusedElement.value = document.activeElement
   // Hold backdrop before fetch to avoid gap if auth iframe shows
   holdGlobalBackdrop()
   generateLink()
@@ -110,6 +114,11 @@ onMounted(() => {
 onUnmounted(() => {
   // Release backdrop when modal closes
   releaseGlobalBackdrop()
+  // Restore focus when modal closes
+  const prev = previouslyFocusedElement.value
+  if (prev && document.body.contains(prev) && !prev.disabled) {
+    prev.focus()
+  }
 })
 </script>