style: 브랜드 로고 아이콘 SVG 교체 (로그인·헤더·포털·환영 화면)

종량제3 세션 작업. GBLS 브랜드 로고를 새 아이콘 형태로 통일.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Views/auth/_shell.php

@@ -44,7 +44,7 @@ if (window.top !== window.self) { try { window.top.location.href = <?= json_enco
 <header class="bg-navy text-white h-12 flex items-center justify-between px-4 shrink-0 shadow">
   <a href="<?= base_url() ?>" class="flex items-center gap-2 shrink-0 tracking-tight hover:opacity-90" title="GBLS (Garbage Bag Logistics System)">
     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" class="h-6 w-6 text-white 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"/>
+      <path fill="currentColor" fill-rule="evenodd" d="M6 7.5 H18 V19.5 A1.5 1.5 0 0 1 16.5 21 H7.5 A1.5 1.5 0 0 1 6 19.5 Z M6 7.5 L8.5 4.2 H15.5 L18 7.5 Z M10.2 5.2 h3.6 a0.5 0.5 0 0 1 0 1 h-3.6 a0.5 0.5 0 0 1 0 -1 z"/>
     </svg>
     <span class="leading-none flex flex-col">
       <strong class="text-base font-extrabold tracking-wide">GBLS</strong>