fix:favicon 원본 PNG 파일로 복원

- SVG favicon 제거, 디자이너 제작 원본 파일 사용
- 로고 스타일은 유지 (빨간 화살표 + SAM + 서브타이틀)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/meta_common.php

@@ -26,12 +26,12 @@ $samLogoHtml = '
     </div>
 </a>';
 
-// SVG favicon (빨간색 화살표)
-$svgFavicon = 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect width="100" height="100" rx="20" fill="%23f1f5f9"/><path d="M50 75V25M25 50l25-25 25 25" stroke="%23ef4444" stroke-width="8" stroke-linecap="round" stroke-linejoin="round" fill="none"/></svg>';
 ?>
-<!-- Favicon (SVG - 빨간색 화살표) -->
-<link rel="icon" type="image/svg+xml" href="<?= $svgFavicon ?>">
+<!-- Favicon (디자이너 제작 원본) -->
 <link rel="apple-touch-icon" sizes="180x180" href="<?= $salesBasePath ?>img/apple-touch-icon.png">
+<link rel="icon" type="image/png" sizes="32x32" href="<?= $salesBasePath ?>img/favicon-32x32.png">
+<link rel="icon" type="image/png" sizes="16x16" href="<?= $salesBasePath ?>img/favicon-16x16.png">
+<link rel="shortcut icon" href="<?= $salesBasePath ?>img/favicon.ico">
 
 <!-- Core Libraries -->
 <script src="https://cdn.tailwindcss.com?v=3.4.1"></script>