fix login

frontend/assets/js/app.js

@@ -43,10 +43,11 @@ async function checkSession() {
             document.getElementById('userDisplay').textContent = data.username;
             if (data.role === 'admin') document.getElementById('settingsBtn').classList.remove('d-none');
             document.getElementById('loginOverlay').style.display = 'none';
-            return;
+            return true;
         }
     } catch (_) {}
     document.getElementById('loginOverlay').style.display = 'flex';
+    throw new Error('not logged in');
 }
 
 async function performLogin(authToken) {
@@ -177,7 +178,7 @@ document.addEventListener('DOMContentLoaded', () => {
         });
 
         document.documentElement.setAttribute('data-bs-theme', 'dark');
-    });
+    }).catch(() => {});
 });
 
 function resizeCanvas() {