prepare('SELECT COUNT(*) FROM threads' . $wsql);
$stc->execute($args);
$total = (int)$stc->fetchColumn();
$pageSize = max(5, (int)fb_cfg('page_size', 20));
$pages = max(1, (int)ceil($total / $pageSize));
$page = isset($_GET['page']) ? (int)$_GET['page'] : 1;
if ($page < 1) { $page = 1; }
if ($page > $pages){ $page = $pages; }
$offset = ($page - 1) * $pageSize;
$sql = 'SELECT id, title, category, status, author_name, reply_count, created_at, updated_at,'
. ' substr(body, 1, 300) AS excerpt FROM threads'
. $wsql . ' ORDER BY ' . $order . ' LIMIT ' . $pageSize . ' OFFSET ' . $offset;
$sth = $pdo->prepare($sql);
$sth->execute($args);
$threads = $sth->fetchAll();
// 附件缩略图与数量（只在有附件时才有开销）
$tids = [];
foreach ($threads as $t) { $tids[] = (int)$t['id']; }
$attImgs = $tids ? fb_attach_map_images($pdo, $tids, 3) : [];
$attCount = $tids ? fb_attach_count_map($pdo, $tids) : [];
fb_layout_head('全部问题');
?>
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