ui: refine auth and account screens

static/js/auth.js

@@ -0,0 +1,19 @@
+function copyRecoveryKey(keyElementId, feedbackElementId) {
+  var keyElement = document.getElementById(keyElementId)
+  var feedbackElement = document.getElementById(feedbackElementId)
+
+  if (!keyElement || !feedbackElement) {
+    return
+  }
+
+  var key = keyElement.textContent || ''
+  navigator.clipboard.writeText(key).then(function () {
+    feedbackElement.textContent = 'Recovery key copied.'
+  }).catch(function () {
+    feedbackElement.textContent = 'Copy failed. Select and copy manually.'
+  })
+}
+
+function confirmDangerAction(message) {
+  return window.confirm(message)
+}