Auto-login via NCue session

If already logged in on ncue.net (Google), reuse NCue session and skip DreamGirl admin prompt.

Co-authored-by: Cursor <cursoragent@cursor.com>

login.php

@@ -4,6 +4,16 @@ require_once __DIR__ . '/auth/auth.php';
 
 dreamgirl_session_start();
 
+$didSso = false;
+// If the user is already logged-in to NCue (Google), auto-login to DreamGirl.
+if ($_SERVER['REQUEST_METHOD'] === 'GET') {
+  $didSso = dreamgirl_try_ncue_sso_login();
+  if ($didSso) {
+    header('Location: ' . dreamgirl_url('index.php'));
+    exit;
+  }
+}
+
 $error = '';
 if ($_SERVER['REQUEST_METHOD'] === 'POST') {
   $username = isset($_POST['username']) ? (string)$_POST['username'] : '';