refactor: unify bag and admin layout routing

app/Views/components/header_brand.php

@@ -0,0 +1,14 @@
+<?php
+declare(strict_types=1);
+
+/** @var string $href Brand link target */
+$href = $href ?? base_url();
+/** @var string $linkClass Anchor + inner flex typography */
+$linkClass = $linkClass ?? 'flex items-center gap-2 shrink-0 text-base font-semibold text-gray-800 tracking-tight hover:text-blue-600';
+?>
+<a href="<?= esc($href) ?>" class="<?= esc($linkClass, 'attr') ?>" title="종량제 시스템">
+  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="h-6 w-6 text-blue-900 translate-y-[1px] shrink-0" aria-hidden="true" focusable="false">
+    <path fill="currentColor" d="M9 3a1 1 0 00-1 1v1H5.75a.75.75 0 000 1.5h12.5a.75.75 0 000-1.5H16V4a1 1 0 00-1-1H9zm9 4H6v11a2 2 0 002 2h8a2 2 0 002-2V7zM10 9a.75.75 0 01.75.75v6a.75.75 0 01-1.5 0v-6A.75.75 0 0110 9zm4 0a.75.75 0 01.75.75v6a.75.75 0 01-1.5 0v-6A.75.75 0 0114 9z"/>
+  </svg>
+  <span class="whitespace-nowrap">종량제 시스템</span>
+</a>