fix landing page

frontend/pages/login.html

@@ -37,11 +37,30 @@
 
     <script src="/js/api.js"></script>
     <script>
-        // Redirect if already logged in
-        if (api.isAuthenticated()) {
-            window.location.href = '/presence';
+        async function init() {
+            // Redirect if already logged in
+            if (api.isAuthenticated()) {
+                window.location.href = '/presence';
+                return;
+            }
+
+            // Check auth mode - if Authelia enabled, redirect to Authelia login
+            try {
+                const configResponse = await fetch('/api/auth/config');
+                const config = await configResponse.json();
+
+                if (config.authelia_enabled && config.login_url) {
+                    const returnUrl = encodeURIComponent(window.location.origin + '/presence');
+                    window.location.href = `${config.login_url}?rd=${returnUrl}`;
+                    return;
+                }
+            } catch (e) {
+                // Continue with local login
+            }
         }
 
+        init();
+
         document.getElementById('loginForm').addEventListener('submit', async (e) => {
             e.preventDefault();