diff --git a/desktop/src/components/TopBar.tsx b/desktop/src/components/TopBar.tsx
index 3ad6551..f0e8022 100644
--- a/desktop/src/components/TopBar.tsx
+++ b/desktop/src/components/TopBar.tsx
@@ -18,9 +18,7 @@ export function TopBar({
     <header className="h-14 bg-white dark:bg-gray-900 border-b border-gray-200 dark:border-gray-700 flex items-center px-4 flex-shrink-0">
       {/* 左侧标题 */}
       <div className="flex items-center gap-2">
-        <div className="w-8 h-8 bg-gradient-to-br from-emerald-400 to-teal-500 rounded-lg flex items-center justify-center text-white font-bold shadow-sm">
-          <span className="text-sm">Z</span>
-        </div>
+        <div className="w-8 h-8 bg-gradient-to-br from-emerald-400 to-teal-500 rounded-lg shadow-sm" />
         <div>
           <span className="font-bold text-lg text-gray-900 dark:text-gray-100">{title}</span>
           {subtitle && (