(sourceResultStr) => {
    try {
        const raw = sourceResultStr ||
            (document.querySelector('#source-result textarea') || {}).value || '{}';
        const result = JSON.parse(raw);
        if (window.__handleSourceResult) window.__handleSourceResult(result);
    } catch (e) {
        console.error('[handle_source_result] parse error:', e);
    }
}