fix:SAM 로고 및 favicon 스타일 변경

- 로고: 빨간색 화살표 아이콘 + SAM + 서브타이틀
- Favicon: SVG 빨간색 화살표로 변경
- 적용 페이지: index.php, barobill/etax, salesmanagement

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

index.php

@@ -165,10 +165,15 @@ $mngUrl = (strpos($currentHost, 'sam.kr') !== false)
         <div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
             <div class="flex justify-between items-center h-16">
                 <div class="flex items-center gap-3 cursor-pointer" onclick="filterAssets('All')">
-                    <div class="w-8 h-8 bg-brand-600 rounded-lg flex items-center justify-center text-white font-bold text-lg shadow-lg shadow-brand-200">
-                        S
+                    <div class="w-10 h-10 bg-slate-100 rounded-xl flex items-center justify-center">
+                        <svg class="w-6 h-6 text-red-500" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round">
+                            <path d="M12 19V5M5 12l7-7 7 7"/>
+                        </svg>
+                    </div>
+                    <div class="flex flex-col">
+                        <span class="text-lg font-bold text-slate-800 leading-tight">SAM</span>
+                        <span class="text-xs text-slate-500 leading-tight">Smart Automation Management</span>
                     </div>
-                    <span class="text-xl font-bold tracking-tight text-slate-900">CodeBridgeX <span class="text-brand-600">SAM</span></span>
                 </div>
                 
                 <!-- Desktop Navigation -->