connect_error) die("数据库连接失败");
$user_id = $_SESSION['user_id'];
$message = '';
$analysis = null;
$result_id = null;
// 获取已开放审稿的期刊列表（至少有一条政策或样本的期刊）
$journals = $conn->query("
SELECT DISTINCT j.id, j.name, j.issn, j.cn
FROM journals j
LEFT JOIN review_policies p ON j.id = p.journal_id
LEFT JOIN review_samples s ON j.id = s.journal_id
WHERE p.id IS NOT NULL OR s.id IS NOT NULL
ORDER BY j.name
");
// 处理提交
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['manuscript_text'])) {
$journal_id = intval($_POST['journal_id'] ?? 0);
$manuscript_text = trim($_POST['manuscript_text'] ?? '');
if (!$journal_id) {
$message = '