移除侧边栏图标边框

src/components/layout/Sidebar.tsx

@@ -57,7 +57,7 @@ export function Sidebar() {
         {/* Logo */}
         <div className="flex h-16 items-center justify-between px-4 border-b border-gray-200 dark:border-gray-700">
           <Link to="/" className="flex items-center gap-3">
-            <div className="flex h-10 w-10 items-center justify-center overflow-hidden rounded-lg bg-white shadow-sm ring-1 ring-gray-200 dark:bg-gray-900 dark:ring-gray-700">
+            <div className="flex h-10 w-10 items-center justify-center overflow-hidden rounded-lg bg-white shadow-sm dark:bg-gray-900">
               <img src={ittoIcon} alt="" className="h-full w-full object-cover" aria-hidden="true" />
             </div>
             {sidebarOpen && (