further things around login

templates/partials/auth-step-indicator.phtml

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * @var int $authStepCurrent 1-based current step (1, 2, or 3)
+ * @var int $authStepTotal   total number of steps (2 or 3)
+ */
+
+$authStepCurrent = (int) ($authStepCurrent ?? 0);
+$authStepTotal = (int) ($authStepTotal ?? 0);
+if ($authStepCurrent < 1 || $authStepTotal < 2) {
+    return;
+}
+?>
+<div class="login-step-indicator" aria-hidden="true">
+    <?php for ($i = 1; $i <= $authStepTotal; $i++): ?>
+        <span class="login-step-indicator-dot<?php if ($i === $authStepCurrent): ?> is-active<?php elseif ($i < $authStepCurrent): ?> is-completed<?php endif; ?>"></span>
+        <?php if ($i < $authStepTotal): ?>
+            <span class="login-step-indicator-line<?php if ($i < $authStepCurrent): ?> is-completed<?php endif; ?>"></span>
+        <?php endif; ?>
+    <?php endfor; ?>
+</div>