Add Builder and Prayers nav links to all admin pages

Every admin page now shows the Builder link (superuser+) and
Prayers link (admin+) consistently in the header nav.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

admin/users.php

@@ -222,6 +222,8 @@ $role_colors  = [
         <h1>&#x271D; <?= htmlspecialchars($site_name) ?></h1>
         <div class="header-actions">
             <a href="<?= BASE_URL ?>/" class="btn btn-ghost" style="font-size:13px">&#x2190; View Site</a>
+            <a href="<?= BASE_URL ?>/admin/builder.php" class="btn btn-ghost">&#x2712; Builder</a>
+            <a href="<?= BASE_URL ?>/admin/prayers.php" class="btn btn-ghost">Prayers</a>
             <a href="<?= BASE_URL ?>/admin/" class="btn btn-ghost">Dashboard</a>
             <?php if ($is_super): ?>
                 <a href="<?= BASE_URL ?>/admin/settings.php" class="btn btn-ghost">Settings</a>