fix: Prevent redundant logout redirects and synchronously clear authentication tokens on the logout page.

src/app/logout/page.tsx

@@ -8,13 +8,19 @@ import Image from 'next/image';
 export default function LogoutPage() {
   const hasStarted = useRef(false);
 
+  // Set logout flag synchronously on render to block API interceptor immediately
+  if (typeof window !== 'undefined') {
+    localStorage.setItem('isLoggingOut', 'true');
+    localStorage.removeItem('accessToken');
+    localStorage.removeItem('refreshToken');
+  }
+
   useEffect(() => {
     if (hasStarted.current) return;
     hasStarted.current = true;
 
     const performLogout = async () => {
       // Clear localStorage
-      localStorage.setItem('isLoggingOut', 'true');
       localStorage.removeItem('accessToken');
       localStorage.removeItem('refreshToken');
       localStorage.removeItem('user');