courrier page layout

app/courrier/page.tsx

@@ -1626,7 +1626,7 @@ export default function CourrierPage() {
   return (
     <>
       {/* Main layout */}
-      <div className="h-screen">
+      <div className="h-[calc(100vh-3rem)] mt-12">
         <div className="flex h-full bg-background text-gray-900 overflow-hidden">
           {/* Sidebar */}
           <div className={`${sidebarOpen ? 'w-60' : 'w-16'} bg-white/95 backdrop-blur-sm border-r border-gray-100 flex flex-col transition-all duration-300 ease-in-out