fix: remove remaining logout JS handler in config.js

frontend/js/config.js

@@ -631,13 +631,7 @@ function initConfigModal() {
     });
   }
 
-  // Logout button (always visible) — calls AuthManager.logout() directly
+  // Logout button — handled inline in index.html (onclick)
-  var logoutBtn = document.getElementById("logout-btn");
-  if (logoutBtn) {
-    logoutBtn.addEventListener("click", function() {
-      AuthManager.logout();
-    });
-  }
 
   // Config nav search
   var cfgSearch = document.getElementById("config-nav-search");