teamp tou uu giao dien

management/src/App.tsx

@@ -110,6 +110,8 @@ function App() {
     const nextVal = !sidebarCollapsed;
     setSidebarCollapsed(nextVal);
     localStorage.setItem('sc_sidebar_collapsed', String(nextVal));
+    // On mobile, also close sidebar overlay when collapsing
+    if (nextVal) setSidebarOpen(false);
   };
   const [myClasses, setMyClasses] = useState<{ id: number; name: string; code: string }[]>(() => {
     try {