FeedLite/admin.php

<?php
/**
 * 反馈管理后台
 * ------------------------------------------------------------------
 * 管理员用口令登录后可以：
 *   · 审核：通过（公开）/ 关闭（判定不是问题，邮件告知提问人）/ 撤下
 *   · 管理：以官方身份回复、改处理状态与可见性、删除问题
 *   · 设置：附件数量与大小上限、附件存储方式（关闭 / 本机硬盘 / 阿里云 OSS）、
 *           OSS 桶信息与鉴权方式（ECS 实例 RAM 角色 或 静态 AccessKey）
 *   · 修改自己的登录口令
 *
 * 入口：/feedback/admin.php
 */
require __DIR__ . '/lib/bootstrap.php';

$pdo = fb_db();

/* ---------------- 退出 ---------------- */
if (isset($_GET['logout'])) {
    unset($_SESSION['fb_admin'], $_SESSION['fb_admin_at']);
    fb_redirect('admin.php');
}

/* ---------------- 登录 ---------------- */
$loginErr = '';
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['login'])) {
    $pw = isset($_POST['admin_password']) ? (string)$_POST['admin_password'] : '';
    $cs = isset($_POST['csrf']) ? (string)$_POST['csrf'] : '';
    if (!fb_csrf_ok($cs)) {
        $loginErr = '会话已过期，请重试。';
    } elseif (!fb_rate_check('admin_login', 10)) {
        $loginErr = '尝试次数过多，请一小时后再试。';
    } elseif ($pw !== '' && fb_admin_verify_password($pw)) {
        fb_admin_login();
        fb_mod_log('login');
        fb_redirect('admin.php');
    } else {
        fb_rate_hit('admin_login');
        $loginErr = '口令不正确。';
    }
}

if (!fb_admin_logged_in()) {
    fb_layout_head('管理登录', ['robots' => 'noindex,nofollow']);
    ?>
    <div class="crumbs"><a href="index.php">← 返回问题列表</a></div>
    <section class="narrow">
      <h1>管理登录</h1>
      <p class="muted">请输入管理员口令（初始口令在 <code>config.php</code> 的 <code>admin_password</code>，登录后在「站点设置」里可以改掉它）。</p>
      <?php fb_flash_box($loginErr, 'error'); ?>
      <form method="post" action="admin.php" class="card-form">
        <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
        <label class="field">
          <span>管理员口令</span>
          <input type="password" name="admin_password" autocomplete="current-password" required>
        </label>
        <div class="form-actions">
          <button class="btn primary" type="submit" name="login" value="1">登录</button>
        </div>
      </form>
    </section>
    <?php
    fb_layout_foot();
    exit;
}

/* ==================================================================
 * 已登录：处理各种操作
 * ================================================================== */
$msg     = '';
$msgType = 'ok';

/** 取一条主题 */
function fb_admin_thread(PDO $pdo, $id) {
    $st = $pdo->prepare('SELECT * FROM threads WHERE id = ?');
    $st->execute([(int)$id]);
    $t = $st->fetch();
    return is_array($t) ? $t : null;
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['act'])) {
    $cs = isset($_POST['csrf']) ? (string)$_POST['csrf'] : '';
    if (!fb_csrf_ok($cs)) {
        $msg = '会话已过期，请重试。';
        $msgType = 'error';
    } else {
        $id  = isset($_POST['id']) ? (int)$_POST['id'] : 0;
        $act = (string)$_POST['act'];
        $t   = fb_admin_thread($pdo, $id);

        if (!$t && $act !== 'settings' && $act !== 'password') {
            $msg = '问题不存在。';
            $msgType = 'error';

        } elseif ($act === 'approve') {
            $newStatus = ((string)$t['status'] === 'closed') ? 'open' : (string)$t['status'];
            $pdo->prepare('UPDATE threads SET visible = 1, status = ?, mod_note = NULL, moderated_at = ? WHERE id = ?')
                ->execute([$newStatus, time(), $id]);
            fb_mod_log('approve', $id, '通过审核并公开');
            $msg = '#' . $id . ' 已通过审核，现已公开显示。';

        } elseif ($act === 'close') {
            $note = trim(isset($_POST['note']) ? (string)$_POST['note'] : '');
            if ($note === '') {
                $msg = '关闭前请先填写给提问人的说明（这段内容会随邮件发出）。';
                $msgType = 'error';
            } else {
                $pdo->prepare("UPDATE threads SET status = 'closed', visible = 0, mod_note = ?, moderated_at = ? WHERE id = ?")
                    ->execute([$note, time(), $id]);
                list($sent, $err) = fb_notify_closed($pdo, $t, $note);
                fb_mod_log('close', $id, '关闭并邮件告知：' . ($sent ? '已发信' : '未发信（' . $err . '）'));
                $msg = $sent
                    ? ('#' . $id . ' 已关闭，说明邮件已发送给 ' . (string)$t['author_email'] . '。')
                    : ('#' . $id . ' 已关闭，但邮件未发出：' . $err);
                $msgType = $sent ? 'ok' : 'error';
            }

        } elseif ($act === 'hide') {
            $pdo->prepare('UPDATE threads SET visible = 0, moderated_at = ? WHERE id = ?')->execute([time(), $id]);
            fb_mod_log('hide', $id, '撤下（转为不公开）');
            $msg = '#' . $id . ' 已撤下（转为不公开）。';

        } elseif ($act === 'status') {
            $statuses = fb_statuses();
            $new      = (string)(isset($_POST['status']) ? $_POST['status'] : '');
            if (!isset($statuses[$new])) {
                $msg = '未知的状态。';
                $msgType = 'error';
            } else {
                $vis = isset($_POST['visible']) ? 1 : 0;
                $pdo->prepare('UPDATE threads SET status = ?, visible = ?, updated_at = ? WHERE id = ?')
                    ->execute([$new, $vis, time(), $id]);
                fb_mod_log('status', $id, '状态改为 ' . $statuses[$new] . '，公开=' . $vis);
                $msg = '#' . $id . ' 已更新：状态「' . $statuses[$new] . '」，' . ($vis ? '公开' : '不公开') . '。';
            }

        } elseif ($act === 'reply') {
            $body = trim(isset($_POST['body']) ? (string)$_POST['body'] : '');
            if (!fb_valid_body($body)) {
                $msg = '回复内容需要 2~5000 个字符。';
                $msgType = 'error';
            } else {
                $now       = time();
                $statuses  = fb_statuses();
                $new       = (string)(isset($_POST['status']) ? $_POST['status'] : '');
                $setStatus = isset($statuses[$new]) ? $new : null;

                $ins = $pdo->prepare('INSERT INTO replies(thread_id, body, author_name, author_email, is_admin, created_at, ip_hash) VALUES(?,?,?,?,?,?,?)');
                $ins->execute([$id, $body, '官方', null, 1, $now, fb_ip_hash()]);
                $replyId = (int)$pdo->lastInsertId();

                if ($setStatus !== null) {
                    $pdo->prepare('UPDATE threads SET reply_count = reply_count + 1, updated_at = ?, status = ? WHERE id = ?')
                        ->execute([$now, $setStatus, $id]);
                } else {
                    $pdo->prepare('UPDATE threads SET reply_count = reply_count + 1, updated_at = ? WHERE id = ?')
                        ->execute([$now, $id]);
                }

                $replyRow = [
                    'id'           => $replyId,
                    'body'         => $body,
                    'author_name'  => '官方',
                    'author_email' => null,
                    'is_admin'     => 1,
                ];
                $err2 = fb_notify_reply($pdo, $t, $replyRow, true);
                fb_mod_log('reply', $id, '官方回复' . ($setStatus !== null ? '，状态改为 ' . $statuses[$setStatus] : ''));
                $msg = '#' . $id . ' 已以官方身份回复' . ($err2 === '' ? '' : '（邮件：' . $err2 . '）') . '。';
            }

        } elseif ($act === 'delete') {
            $st = $pdo->prepare('SELECT oss_key FROM attachments WHERE thread_id = ?');
            $st->execute([$id]);
            foreach ($st->fetchAll() as $r) { fb_attach_delete((string)$r['oss_key']); }
            $pdo->prepare('DELETE FROM threads WHERE id = ?')->execute([$id]);
            fb_mod_log('delete', $id, '删除问题：' . fb_excerpt((string)$t['title'], 40));
            $msg = '#' . $id . ' 已删除。';

        } elseif ($act === 'settings') {
            $msg = fb_admin_save_settings();

        } elseif ($act === 'password') {
            $old = (string)(isset($_POST['old_password']) ? $_POST['old_password'] : '');
            $n1  = (string)(isset($_POST['new_password']) ? $_POST['new_password'] : '');
            $n2  = (string)(isset($_POST['new_password2']) ? $_POST['new_password2'] : '');
            if (!fb_admin_verify_password($old)) {
                $msg = '当前口令不正确。';
                $msgType = 'error';
            } elseif (fb_len($n1) < 8) {
                $msg = '新口令至少 8 个字符。';
                $msgType = 'error';
            } elseif ($n1 !== $n2) {
                $msg = '两次输入的新口令不一致。';
                $msgType = 'error';
            } else {
                fb_admin_set_password($n1);
                fb_mod_log('password');
                $msg = '口令已修改，下次登录请使用新口令。';
            }
        }
    }
}

/**
 * 保存站点设置（把表单值写进 settings 表；config.php 仍是出厂默认值）
 * @return string 提示语
 */
function fb_admin_save_settings() {
    // PHP 会把表单字段名里的「.」替换成「_」，所以两种写法都读一遍
    $post = function ($k, $def = null) {
        if (isset($_POST[$k])) { return $_POST[$k]; }
        $alt = str_replace('.', '_', $k);
        if (isset($_POST[$alt])) { return $_POST[$alt]; }
        return $def;
    };

    // 站点信息（对外展示，用于说明「本系统为哪个软件提供反馈服务」）
    // 留空 = 删除该设置项，回落到 config.php 的出厂值，便于恢复默认。
    foreach (['site_name', 'site_desc'] as $k) {
        $v = trim((string)$post($k, ''));
        if ($v === '') { fb_unset_setting($k); }
        else           { fb_set_setting($k, $v); }
    }

    $ints = [
        'upload.image_max_per_post' => [0, 20],
        'upload.video_max_per_post' => [0, 10],
        'upload.retention_days'     => [1, 3650],
        'upload.upload_per_hour'    => [1, 2000],
        'upload.image_max_side'     => [480, 4096],
    ];
    foreach ($ints as $k => $range) {
        $v = (int)$post($k, 0);
        $v = max($range[0], min($range[1], $v));
        fb_set_setting($k, $v);
    }

    // MB → 字节
    $mbs = [
        'upload.image_max_bytes' => [0.2, 50],
        'upload.video_max_bytes' => [1, 500],
        'upload.total_cap_bytes' => [10, 100000],
    ];
    foreach ($mbs as $k => $range) {
        $mb = (float)$post($k, 0);
        $mb = max($range[0], min($range[1], $mb));
        fb_set_setting($k, (int)round($mb * 1048576));
    }

    $storage = (string)$post('attachment.storage', 'off');
    if (!in_array($storage, ['off', 'local', 'oss'], true)) { $storage = 'off'; }
    fb_set_setting('attachment.storage', $storage);
    // OSS 模式下 oss.enabled 必须跟着开；其它模式关掉，避免误判
    fb_set_setting('oss.enabled', $storage === 'oss' ? 1 : 0);

    $texts = ['oss.endpoint', 'oss.bucket', 'oss.instance_role', 'oss.domain', 'oss.prefix', 'moderation.close_mail_subject'];
    foreach ($texts as $k) {
        $v = trim((string)$post($k, ''));
        // 对象键前缀留空会让对象键变成 "/2026/..."，回落到出厂默认 'fb'
        if ($k === 'oss.prefix' && $v === '') { fb_unset_setting($k); continue; }
        fb_set_setting($k, $v);
    }

    $src = (string)$post('oss.credential_source', 'instance_role');
    fb_set_setting('oss.credential_source', $src === 'static' ? 'static' : 'instance_role');
    fb_set_setting('oss.access_key', trim((string)$post('oss.access_key', '')));
    $sk = trim((string)$post('oss.secret_key', ''));
    if ($sk !== '') { fb_set_setting('oss.secret_key', $sk); }

    fb_set_setting('oss.visibility', ((string)$post('oss.visibility', 'public')) === 'private' ? 'private' : 'public');
    fb_set_setting('oss.url_scheme', ((string)$post('oss.url_scheme', 'https')) === 'http' ? 'http' : 'https');
    fb_set_setting('oss.verify',         $post('oss.verify') ? 1 : 0);
    fb_set_setting('oss.image_process',  $post('oss.image_process') ? 1 : 0);
    fb_set_setting('moderation.enabled', $post('moderation.enabled') ? 1 : 0);

    fb_mod_log('settings', null, '保存站点设置：存储=' . $storage);
    return '设置已保存。';
}

/* ==================================================================
 * 页面
 * ================================================================== */
$tab = (string)(isset($_GET['tab']) ? $_GET['tab'] : 'pending');
if (!in_array($tab, ['pending', 'all', 'thread', 'settings', 'log'], true)) { $tab = 'pending'; }

fb_layout_head('管理后台', ['robots' => 'noindex,nofollow']);
?>
<div class="page-head">
  <div>
    <h1>管理后台</h1>
    <p class="muted">登录状态 <?php echo (int)floor(fb_admin_idle_ttl() / 3600); ?> 小时内有效，超时自动退出。</p>
  </div>
  <a class="btn" href="admin.php?logout=1">退出登录</a>
</div>

<nav class="tabs">
  <a class="tab<?php echo $tab === 'pending' ? ' on' : ''; ?>" href="admin.php?tab=pending">待审核</a>
  <a class="tab<?php echo $tab === 'all' ? ' on' : ''; ?>" href="admin.php?tab=all">全部问题</a>
  <a class="tab<?php echo $tab === 'settings' ? ' on' : ''; ?>" href="admin.php?tab=settings">站点设置</a>
  <a class="tab<?php echo $tab === 'log' ? ' on' : ''; ?>" href="admin.php?tab=log">操作日志</a>
</nav>

<?php fb_flash_box($msg, $msgType === 'ok' ? 'ok' : 'error'); ?>

<?php if ($tab === 'pending'): ?>
  <?php
  $pending = $pdo->query(
      "SELECT id, title, body, category, status, author_name, author_email, created_at
       FROM threads WHERE visible = 0 AND status <> 'closed' ORDER BY created_at DESC"
  )->fetchAll();
  ?>
  <h2 style="margin:22px 0 10px">待审核 <span class="muted">（<?php echo count($pending); ?>）</span></h2>
  <?php if (!$pending): ?>
    <div class="empty"><p>当前没有待审核的反馈。</p></div>
  <?php else: ?>
    <?php foreach ($pending as $t) { echo fb_admin_thread_card($t); } ?>
  <?php endif; ?>

<?php elseif ($tab === 'all'): ?>
  <?php
  $where = [];
  $args  = [];
  $stF   = (string)(isset($_GET['status']) ? $_GET['status'] : '');
  $visF  = (string)(isset($_GET['vis']) ? $_GET['vis'] : '');
  $catF  = (string)(isset($_GET['cat']) ? $_GET['cat'] : '');
  $qF    = trim((string)(isset($_GET['q']) ? $_GET['q'] : ''));
  if ($stF !== '')  { $where[] = 'status = ?';   $args[] = $stF; }
  if ($visF === '1' || $visF === '0') { $where[] = 'visible = ?'; $args[] = (int)$visF; }
  if ($catF !== '') { $where[] = 'category = ?'; $args[] = $catF; }
  if ($qF !== '')   { $where[] = '(title LIKE ? OR body LIKE ?)'; $args[] = '%' . $qF . '%'; $args[] = '%' . $qF . '%'; }
  $wSql = $where ? ('WHERE ' . implode(' AND ', $where)) : '';

  $cntSt = $pdo->prepare('SELECT COUNT(*) FROM threads ' . $wSql);
  $cntSt->execute($args);
  $total    = (int)$cntSt->fetchColumn();
  $pageSize = max(5, (int)fb_cfg('page_size', 20));
  $pages    = max(1, (int)ceil($total / $pageSize));
  $page     = min(max(1, (int)(isset($_GET['page']) ? $_GET['page'] : 1)), $pages);
  $offset   = ($page - 1) * $pageSize;

  $lst = $pdo->prepare('SELECT * FROM threads ' . $wSql . ' ORDER BY updated_at DESC LIMIT ' . (int)$pageSize . ' OFFSET ' . (int)$offset);
  $lst->execute($args);
  $rows = $lst->fetchAll();
  ?>
  <form class="filters" method="get" action="admin.php">
    <input type="hidden" name="tab" value="all">
    <input type="text" name="q" value="<?php echo e($qF); ?>" placeholder="搜索标题或正文">
    <select name="status">
      <option value="">全部状态</option>
      <?php foreach (fb_statuses() as $k => $label): ?>
        <option value="<?php echo e($k); ?>"<?php echo $stF === $k ? ' selected' : ''; ?>><?php echo e($label); ?></option>
      <?php endforeach; ?>
    </select>
    <select name="cat">
      <option value="">全部分类</option>
      <?php foreach (fb_categories() as $k => $label): ?>
        <option value="<?php echo e($k); ?>"<?php echo $catF === $k ? ' selected' : ''; ?>><?php echo e($label); ?></option>
      <?php endforeach; ?>
    </select>
    <select name="vis">
      <option value="">公开与否不限</option>
      <option value="1"<?php echo $visF === '1' ? ' selected' : ''; ?>>已公开</option>
      <option value="0"<?php echo $visF === '0' ? ' selected' : ''; ?>>未公开</option>
    </select>
    <button class="btn" type="submit">筛选</button>
    <a class="btn" href="admin.php?tab=all">重置</a>
  </form>

  <h2 style="margin:16px 0 10px">全部问题 <span class="muted">（<?php echo $total; ?> 条，第 <?php echo $page; ?>/<?php echo $pages; ?> 页）</span></h2>

  <?php if (!$rows): ?>
    <div class="empty"><p>没有符合条件的问题。</p></div>
  <?php else: ?>
    <div class="list">
      <?php foreach ($rows as $t): ?>
        <div class="item" style="cursor:default">
          <div class="item-top">
            <span class="badge cat"><?php echo e(fb_category_label($t['category'])); ?></span>
            <span class="badge st st-<?php echo e($t['status']); ?>"><?php echo e(fb_status_label($t['status'])); ?></span>
            <a class="item-title" href="admin.php?tab=thread&amp;id=<?php echo (int)$t['id']; ?>"><?php echo e($t['title']); ?></a>
            <span class="item-id">#<?php echo (int)$t['id']; ?></span>
            <?php if ((int)$t['visible'] !== 1): ?><span class="badge st st-closed">未公开</span><?php endif; ?>
          </div>
          <p class="item-ex"><?php echo e(fb_excerpt((string)$t['body'], 120)); ?></p>
          <div class="item-meta">
            <span class="who"><?php echo e($t['author_name']); ?></span>
            <span class="dot">·</span>
            <span><?php echo e(fb_fmt_time($t['created_at'])); ?></span>
            <span class="dot">·</span>
            <span><?php echo (int)$t['reply_count']; ?> 条回复</span>
            <span class="dot">·</span>
            <a href="admin.php?tab=thread&amp;id=<?php echo (int)$t['id']; ?>">管理</a>
          </div>
        </div>
      <?php endforeach; ?>
    </div>
    <?php if ($pages > 1): ?>
      <div class="pager">
        <?php if ($page > 1): ?><a class="btn" href="admin.php?<?php echo e(http_build_query(array_merge($_GET, ['tab' => 'all', 'page' => $page - 1]))); ?>">上一页</a><?php endif; ?>
        <?php if ($page < $pages): ?><a class="btn" href="admin.php?<?php echo e(http_build_query(array_merge($_GET, ['tab' => 'all', 'page' => $page + 1]))); ?>">下一页</a><?php endif; ?>
      </div>
    <?php endif; ?>
  <?php endif; ?>

<?php elseif ($tab === 'thread'): ?>
  <?php
  $id = (int)(isset($_GET['id']) ? $_GET['id'] : 0);
  $t  = fb_admin_thread($pdo, $id);
  if (!$t): ?>
    <div class="empty"><p>问题不存在。<a href="admin.php?tab=all">返回列表</a></p></div>
  <?php else:
    $rs = $pdo->prepare('SELECT * FROM replies WHERE thread_id = ? ORDER BY created_at ASC, id ASC');
    $rs->execute([$id]);
    $replies = $rs->fetchAll();
    $atts    = fb_attach_for_thread($pdo, $id);
  ?>
    <div class="crumbs"><a href="admin.php?tab=all">← 返回全部问题</a></div>

    <div class="card-form" style="margin:0 0 16px">
      <div class="item-top">
        <span class="badge cat"><?php echo e(fb_category_label($t['category'])); ?></span>
        <span class="badge st st-<?php echo e($t['status']); ?>"><?php echo e(fb_status_label($t['status'])); ?></span>
        <span class="item-title"><?php echo e($t['title']); ?></span>
        <span class="item-id">#<?php echo (int)$t['id']; ?></span>
      </div>
      <div class="item-ex" style="white-space:normal"><?php echo nl2br(e($t['body'])); ?></div>
      <?php if (!empty($atts['main'])) { echo fb_attach_render($atts['main']); } ?>
      <div class="item-meta">
        <span class="who"><?php echo e($t['author_name']); ?></span>
        <span class="dot">·</span>
        <span><?php echo e($t['author_email']); ?></span>
        <?php if (!empty($t['author_phone'])): ?><span class="dot">·</span><span><?php echo e($t['author_phone']); ?></span><?php endif; ?>
        <span class="dot">·</span>
        <span><?php echo e(fb_fmt_time($t['created_at'])); ?></span>
        <span class="dot">·</span>
        <span><?php echo ((int)$t['visible'] === 1) ? '已公开' : '未公开'; ?></span>
      </div>
    </div>

    <?php foreach ($replies as $r): ?>
      <div class="reply<?php echo ((int)$r['is_admin'] === 1) ? ' admin' : ''; ?>">
        <div class="reply-head">
          <span class="who"><?php echo e($r['author_name']); ?></span>
          <?php if ((int)$r['is_admin'] === 1): ?><span class="badge official">官方</span><?php endif; ?>
          <span class="dot">·</span>
          <span><?php echo e(fb_fmt_time($r['created_at'])); ?></span>
        </div>
        <div class="reply-body"><?php echo nl2br(e($r['body'])); ?></div>
        <?php if (isset($atts['replies'][(int)$r['id']])) { echo fb_attach_render($atts['replies'][(int)$r['id']], ['compact' => true]); } ?>
      </div>
    <?php endforeach; ?>

    <h2 style="margin:24px 0 10px">以官方身份回复</h2>
    <form method="post" action="admin.php?tab=thread&amp;id=<?php echo (int)$id; ?>" class="card-form">
      <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
      <input type="hidden" name="id" value="<?php echo (int)$id; ?>">
      <label class="field">
        <span>回复内容</span>
        <textarea name="body" rows="5" maxlength="5000" placeholder="写给提问人的答复；提交后会给对方发一封通知邮件"></textarea>
      </label>
      <label class="field">
        <span>同时把状态改为</span>
        <select name="status">
          <option value="">（不改）</option>
          <?php foreach (fb_statuses() as $k => $label): ?>
            <option value="<?php echo e($k); ?>"><?php echo e($label); ?></option>
          <?php endforeach; ?>
        </select>
      </label>
      <div class="form-actions">
        <button class="btn primary" type="submit" name="act" value="reply">发布官方回复</button>
      </div>
    </form>

    <h2 style="margin:24px 0 10px">状态与可见性</h2>
    <form method="post" action="admin.php?tab=thread&amp;id=<?php echo (int)$id; ?>" class="card-form">
      <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
      <input type="hidden" name="id" value="<?php echo (int)$id; ?>">
      <div class="row2">
        <label class="field">
          <span>处理状态</span>
          <select name="status">
            <?php foreach (fb_statuses() as $k => $label): ?>
              <option value="<?php echo e($k); ?>"<?php echo ((string)$t['status'] === $k) ? ' selected' : ''; ?>><?php echo e($label); ?></option>
            <?php endforeach; ?>
          </select>
        </label>
        <label class="field">
          <span>公开显示</span>
          <label class="check"><input type="checkbox" name="visible" value="1"<?php echo ((int)$t['visible'] === 1) ? ' checked' : ''; ?>> 在公开列表中显示</label>
        </label>
      </div>
      <div class="form-actions">
        <button class="btn primary" type="submit" name="act" value="status">保存</button>
        <?php if ((int)$t['visible'] !== 1): ?>
          <button class="btn" type="submit" name="act" value="approve">通过并公开</button>
        <?php else: ?>
          <button class="btn" type="submit" name="act" value="hide">撤下</button>
        <?php endif; ?>
      </div>
    </form>

    <h2 style="margin:24px 0 10px">关闭（判定不是应用问题，会发邮件给提问人）</h2>
    <form method="post" action="admin.php?tab=thread&amp;id=<?php echo (int)$id; ?>" class="card-form">
      <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
      <input type="hidden" name="id" value="<?php echo (int)$id; ?>">
      <label class="field">
        <span>关闭说明 <b class="req">*</b> <i class="hint">会作为邮件正文发给 <?php echo e($t['author_email']); ?></i></span>
        <textarea name="note" rows="4" maxlength="4000" placeholder="例如：该现象来自服务器端的 CalDAV 限制，并非应用问题；建议…"></textarea>
      </label>
      <div class="form-actions">
        <button class="btn" type="submit" name="act" value="close">关闭并邮件告知</button>
      </div>
    </form>

    <form method="post" action="admin.php?tab=all" class="card-form" style="margin-top:24px"
          onsubmit="return confirm('确定删除 #<?php echo (int)$id; ?>？该问题的回复与附件会一并删除，且不可恢复。');">
      <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
      <input type="hidden" name="id" value="<?php echo (int)$id; ?>">
      <div class="form-actions">
        <button class="btn danger" type="submit" name="act" value="delete">删除这条问题</button>
      </div>
    </form>
  <?php endif; ?>

<?php elseif ($tab === 'settings'): ?>
  <?php
  $mode    = fb_store_mode();
  $ossStat = fb_oss_cred_status();
  $mb = function ($bytes) { return round(((int)$bytes) / 1048576, 1); };
  ?>
  <form method="post" action="admin.php?tab=settings" class="card-form">
    <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">

    <h2 style="margin:8px 0 10px">站点信息</h2>
    <label class="field"><span>站点标题</span>
      <input type="text" name="site_name" maxlength="80" placeholder="轻反馈"
             value="<?php echo e((string)fb_cfg('site_name', '')); ?>">
      <i class="hint">显示在浏览器标签、页面顶栏与页脚。用它说明「本系统为哪个软件提供反馈服务」，如「XX 软件 · 问题反馈」。</i></label>
    <label class="field"><span>站点描述</span>
      <textarea name="site_desc" rows="3" maxlength="300"
                placeholder="欢迎在这里反馈使用问题、提出功能建议。"><?php echo e((string)fb_cfg('site_desc', '')); ?></textarea>
      <i class="hint">显示在首页标题下方，一句话说明这里可以反馈什么。两项都留空则恢复为出厂默认。</i></label>

    <h2 style="margin:24px 0 10px">附件存储</h2>
    <label class="field">
      <span>附件保存在哪</span>
      <select name="attachment_storage">
        <option value="off"<?php echo $mode === 'off' ? ' selected' : ''; ?>>关闭（不开放上传）</option>
        <option value="local"<?php echo $mode === 'local' ? ' selected' : ''; ?>>本机硬盘（站点 uploads/ 目录）</option>
        <option value="oss"<?php echo $mode === 'oss' ? ' selected' : ''; ?>>阿里云 OSS（浏览器直传）</option>
      </select>
      <i class="hint">本机：文件落在站点目录，占用服务器磁盘与带宽，但零配置、立刻可用；OSS：文件不经过服务器，需先建桶并授权。</i>
    </label>

    <div class="grid2">
      <label class="field"><span>每个问题最多几张图片</span>
        <input type="number" name="upload_image_max_per_post" min="0" max="20" value="<?php echo (int)fb_upload_cfg('image_max_per_post', 4); ?>"></label>
      <label class="field"><span>单张图片上限（MB）</span>
        <input type="number" step="0.1" min="0.2" max="50" name="upload_image_max_bytes" value="<?php echo $mb(fb_upload_cfg('image_max_bytes', 5242880)); ?>"></label>
      <label class="field"><span>每个问题最多几个视频</span>
        <input type="number" name="upload_video_max_per_post" min="0" max="10" value="<?php echo (int)fb_upload_cfg('video_max_per_post', 1); ?>"></label>
      <label class="field"><span>单个视频上限（MB）</span>
        <input type="number" step="1" min="1" max="500" name="upload_video_max_bytes" value="<?php echo $mb(fb_upload_cfg('video_max_bytes', 52428800)); ?>"></label>
      <label class="field"><span>全站附件总量上限（MB）</span>
        <input type="number" step="16" min="10" name="upload_total_cap_bytes" value="<?php echo $mb(fb_upload_cfg('total_cap_bytes', 1073741824)); ?>"></label>
      <label class="field"><span>附件保留天数</span>
        <input type="number" name="upload_retention_days" min="1" max="3650" value="<?php echo (int)fb_upload_cfg('retention_days', 365); ?>"></label>
      <label class="field"><span>每 IP 每小时最多上传几次</span>
        <input type="number" name="upload_upload_per_hour" min="1" max="2000" value="<?php echo (int)fb_upload_cfg('upload_per_hour', 60); ?>"></label>
      <label class="field"><span>图片压缩后的最长边（像素）</span>
        <input type="number" name="upload_image_max_side" min="480" max="4096" value="<?php echo (int)fb_upload_cfg('image_max_side', 1600); ?>"></label>
    </div>

    <h2 style="margin:24px 0 10px">阿里云 OSS（选「OSS」时才需要填）</h2>
    <div class="grid2">
      <label class="field"><span>Endpoint</span>
        <input type="text" name="oss_endpoint" placeholder="oss-cn-beijing.aliyuncs.com" value="<?php echo e((string)fb_cfg('oss.endpoint', '')); ?>"></label>
      <label class="field"><span>Bucket 名</span>
        <input type="text" name="oss_bucket" value="<?php echo e((string)fb_cfg('oss.bucket', '')); ?>"></label>
      <label class="field"><span>鉴权方式</span>
        <select name="oss_credential_source">
          <option value="instance_role"<?php echo fb_oss_credential_source() === 'instance_role' ? ' selected' : ''; ?>>ECS 实例 RAM 角色（推荐）</option>
          <option value="static"<?php echo fb_oss_credential_source() === 'static' ? ' selected' : ''; ?>>静态 AccessKey</option>
        </select></label>
      <label class="field"><span>ECS 实例 RAM 角色名</span>
        <input type="text" name="oss_instance_role" placeholder="FeedLiteOssRole" value="<?php echo e((string)fb_cfg('oss.instance_role', '')); ?>"></label>
      <label class="field"><span>AccessKeyId（静态鉴权用）</span>
        <input type="text" name="oss_access_key" value="<?php echo e((string)fb_cfg('oss.access_key', '')); ?>"></label>
      <label class="field"><span>AccessKeySecret（留空＝不修改）</span>
        <input type="password" name="oss_secret_key" autocomplete="new-password"
               placeholder="<?php echo (string)fb_cfg('oss.secret_key', '') !== '' ? '已设置，留空保持不变' : '未设置'; ?>"></label>
      <label class="field"><span>自定义访问域名（可选）</span>
        <input type="text" name="oss_domain" placeholder="https://fb-img.example.com" value="<?php echo e((string)fb_cfg('oss.domain', '')); ?>"></label>
      <label class="field"><span>对象键前缀</span>
        <input type="text" name="oss_prefix" value="<?php echo e((string)fb_cfg('oss.prefix', 'fb')); ?>"></label>
      <label class="field"><span>桶读写权限</span>
        <select name="oss_visibility">
          <option value="public"<?php echo ((string)fb_cfg('oss.visibility', 'public')) === 'public' ? ' selected' : ''; ?>>公共读</option>
          <option value="private"<?php echo ((string)fb_cfg('oss.visibility', 'public')) === 'private' ? ' selected' : ''; ?>>私有（展示时签名）</option>
        </select></label>
      <label class="field"><span>访问协议</span>
        <select name="oss_url_scheme">
          <option value="https"<?php echo ((string)fb_cfg('oss.url_scheme', 'https')) === 'https' ? ' selected' : ''; ?>>https</option>
          <option value="http"<?php echo ((string)fb_cfg('oss.url_scheme', 'https')) === 'http' ? ' selected' : ''; ?>>http</option>
        </select></label>
    </div>
    <label class="check"><input type="checkbox" name="oss_verify" value="1"<?php echo fb_cfg('oss.verify', true) ? ' checked' : ''; ?>> 提交时回源复核附件（防伪造）</label>
    <label class="check"><input type="checkbox" name="oss_image_process" value="1"<?php echo fb_cfg('oss.image_process', true) ? ' checked' : ''; ?>> 缩略图使用 OSS 图片处理（省流量）</label>

    <h2 style="margin:24px 0 10px">审核</h2>
    <label class="check"><input type="checkbox" name="moderation_enabled" value="1"<?php echo fb_moderation_on() ? ' checked' : ''; ?>> 先审后显（新提交的问题默认不公开，需你通过后才显示）</label>
    <label class="field"><span>关闭通知邮件标题</span>
      <input type="text" name="moderation_close_mail_subject" value="<?php echo e((string)fb_cfg('moderation.close_mail_subject', '关于你反馈的问题《%s》')); ?>">
      <i class="hint">%s 会替换成问题标题。</i></label>

    <div class="form-actions">
      <button class="btn primary" type="submit" name="act" value="settings">保存设置</button>
    </div>
  </form>

  <h2 style="margin:26px 0 10px">存储体检</h2>
  <div class="card-form">
    <div style="display:flex;flex-direction:column;gap:6px">
      <span>当前存储方式：<b><?php echo $mode === 'oss' ? '阿里云 OSS' : ($mode === 'local' ? '本机硬盘' : '已关闭'); ?></b></span>
      <?php if ($mode === 'local'): ?>
        <?php $ld = fb_local_diag(); ?>
        <span>上传目录：<code><?php echo e($ld['dir']); ?></code> — <?php echo $ld['ok'] ? '可写 ✅' : '不可写 ❌'; ?></span>
        <?php if (!$ld['ok']): ?>
          <span class="muted small"><?php echo e($ld['tip']); ?></span>
        <?php endif; ?>
      <?php elseif ($mode === 'oss'): ?>
        <span>鉴权方式：<b><?php echo e($ossStat['label']); ?></b></span>
        <span>凭证状态：<?php echo !empty($ossStat['ok']) ? ('已取得 AccessKey（尾号 ' . e($ossStat['ak_tail']) . '）✅') : ('未取得 ❌ ' . e((string)$ossStat['error'])); ?></span>
        <span>Bucket：<?php echo e((string)fb_cfg('oss.bucket', '')); ?> ／ Endpoint：<?php echo e((string)fb_cfg('oss.endpoint', '')); ?></span>
      <?php endif; ?>
      <span>已用附件：<?php echo e(fb_size_h(fb_attach_total_bytes($pdo))); ?> ／ 上限 <?php echo e(fb_size_h(fb_upload_cfg('total_cap_bytes', 0))); ?></span>
    </div>
  </div>

  <h2 style="margin:26px 0 10px">修改登录口令</h2>
  <form method="post" action="admin.php?tab=settings" class="card-form">
    <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
    <div class="grid2">
      <label class="field"><span>当前口令</span><input type="password" name="old_password" autocomplete="current-password"></label>
      <label class="field"><span>新口令（至少 8 位）</span><input type="password" name="new_password" autocomplete="new-password"></label>
      <label class="field"><span>再输入一次新口令</span><input type="password" name="new_password2" autocomplete="new-password"></label>
    </div>
    <div class="form-actions">
      <button class="btn" type="submit" name="act" value="password">修改口令</button>
    </div>
    <p class="muted small">新口令保存在数据库里，优先级高于 <code>config.php</code> 的 <code>admin_password</code>；改完立即生效。</p>
  </form>

<?php else: ?>
  <?php
  $logs = $pdo->query('SELECT * FROM mod_log ORDER BY created_at DESC, id DESC LIMIT 100')->fetchAll();
  ?>
  <h2 style="margin:8px 0 10px">最近操作 <span class="muted">（<?php echo count($logs); ?> 条）</span></h2>
  <?php if (!$logs): ?>
    <div class="empty"><p>还没有操作记录。</p></div>
  <?php else: ?>
    <div class="list">
      <?php foreach ($logs as $l): ?>
        <div class="item" style="cursor:default">
          <div class="item-top">
            <span class="badge cat"><?php echo e((string)$l['action']); ?></span>
            <?php if (!empty($l['thread_id'])): ?>
              <a class="item-title" href="admin.php?tab=thread&amp;id=<?php echo (int)$l['thread_id']; ?>">#<?php echo (int)$l['thread_id']; ?></a>
            <?php endif; ?>
          </div>
          <p class="item-ex"><?php echo e((string)$l['detail']); ?></p>
          <div class="item-meta"><span><?php echo e(fb_fmt_time($l['created_at'])); ?></span></div>
        </div>
      <?php endforeach; ?>
    </div>
  <?php endif; ?>
<?php endif; ?>

<?php
fb_layout_foot();

/**
 * 待审核卡片（含「通过」与「关闭并邮件告知」两个操作）
 */
function fb_admin_thread_card(array $t) {
    ob_start(); ?>
    <div class="card-form" style="margin:0 0 16px">
      <div class="item-top">
        <span class="badge cat"><?php echo e(fb_category_label($t['category'])); ?></span>
        <span class="badge st st-<?php echo e($t['status']); ?>"><?php echo e(fb_status_label($t['status'])); ?></span>
        <span class="item-title"><?php echo e($t['title']); ?></span>
        <span class="item-id" title="问题编号">#<?php echo (int)$t['id']; ?></span>
      </div>

      <div class="item-ex" style="white-space:normal"><?php echo nl2br(e($t['body'])); ?></div>

      <div class="item-meta">
        <span class="who"><?php echo e($t['author_name']); ?></span>
        <span class="dot">·</span>
        <span><?php echo e(fb_fmt_time($t['created_at'])); ?></span>
        <span class="dot">·</span>
        <span><?php echo e($t['author_email']); ?></span>
        <span class="dot">·</span>
        <a href="admin.php?tab=thread&amp;id=<?php echo (int)$t['id']; ?>">进入管理</a>
      </div>

      <div class="row2" style="margin-top:14px">
        <form method="post" action="admin.php?tab=pending">
          <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
          <input type="hidden" name="id" value="<?php echo (int)$t['id']; ?>">
          <div class="form-actions">
            <button class="btn primary" type="submit" name="act" value="approve">通过并公开</button>
          </div>
        </form>

        <form method="post" action="admin.php?tab=pending">
          <input type="hidden" name="csrf" value="<?php echo e(fb_csrf_token()); ?>">
          <input type="hidden" name="id" value="<?php echo (int)$t['id']; ?>">
          <label class="field">
            <span>关闭说明 <b class="req">*</b> <i class="hint">判定"不是问题"时填写，会随邮件发给提问人</i></span>
            <textarea name="note" rows="4" maxlength="4000" placeholder="例如：该现象是服务器端的 CalDAV 限制，并非应用问题；建议改用…"></textarea>
          </label>
          <div class="form-actions">
            <button class="btn" type="submit" name="act" value="close">关闭并邮件告知</button>
          </div>
        </form>
      </div>
    </div>
    <?php
    return ob_get_clean();
}