新增 logo、優化 AI 問答

components/admin/admin-layout.tsx

@@ -264,8 +264,12 @@ export function AdminLayout({ children, currentPage, onPageChange }: AdminLayout
         {/* Logo */}
         <div className="p-4 border-b">
           <div className="flex items-center space-x-3">
-            <div className="w-8 h-8 bg-gradient-to-r from-blue-600 to-purple-600 rounded-lg flex items-center justify-center">
-              <Settings className="w-5 h-5 text-white" />
+            <div className="h-8 rounded-lg flex items-center justify-center">
+              <img 
+                src="/logo.png" 
+                alt="強茂集團 AI 展示平台" 
+                className="h-8 object-contain"
+              />
             </div>
             {sidebarOpen && (
               <div>