front: poll the Tasks page every 1s (was 2s) for smoother live progress

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011DDv7BchtZQWsnPG6Jm49m

codai/admin/templates/tasks.html

@@ -435,8 +435,8 @@ async function removeTask(id) {
 loadTasks();
 loadSystemStats();
 loadEngines();
-setInterval(loadTasks, 2000);
-setInterval(loadSystemStats, 2000);
+setInterval(loadTasks, 1000);
+setInterval(loadSystemStats, 1000);
 setInterval(loadEngines, 5000);
 </script>
 {% endblock %}