blog/src/components/pages/BooksPage.astro

---
/**
 * 书评索引（/books）：方案 C「抽书阅读」（用户 2026-11-03 拍板定稿）。
 *
 * 为什么是这一版：五个方案里它是唯一在「书少、封面少」时也不露怯的——
 * 一排放得下、长书名不裁、没有 4+1 孤儿位；点一行抽出封面与简介，靠原生
 * details 零 JS。
 *
 * 置顶契约（与文章同一套，见 src/lib/post-order.ts）：
 * - frontmatter `pinned: true` → 排在最前（置顶优先 → 日期倒序）
 * - **支持多本置顶**：所有 pinned 书都默认展开，不限于一本
 * - 置顶标记用「↑ + 横线」的回到顶部图标，不写文字（用户要求）；
 *   展开/收起是另一个形状的 chevron，避免两个箭头混读
 */
import { getCollection } from 'astro:content';
import { isVisiblePost } from '../../lib/post-visibility';
import { Image } from 'astro:assets';
import BaseLayout from '../../layouts/BaseLayout.astro';
import { t } from '../../i18n/ui';
import type { Locale } from '../../lib/locale';
import { sortPosts } from '../../lib/post-order';
import { pageNote } from '../../lib/site-content';

interface Props {
  locale?: Locale;
}
const { locale = 'zh' } = Astro.props;
// 标题下说明：文字与样式都可后台改（白名单校验，非法值回落）
const note = await pageNote('books', locale);

const books = sortPosts(
  await getCollection(
    'posts',
    ({ data }) => isVisiblePost(data) && data.category === 'reading',
  ),
);

/**
 * description 回退契约：缺省取正文第一个非空段落（去 markdown 记号）前 60 字。
 * 与历史实现保持一致——书架卡不能出现空白简介。
 */
const firstPara = (body: string | undefined): string => {
  const line =
    (body ?? '')
      .split(/\n\s*\n/)
      .map((l) => l.trim())
      .find((l) => l && !l.startsWith('#') && !l.startsWith('---')) ?? '';
  return line.replace(/[*_>`[\]]/g, '').slice(0, 60);
};

const items = books.map((b) => ({
  id: b.id,
  title: b.data.title,
  author: b.data.bookAuthor ?? '',
  desc: b.data.description ?? firstPara(b.body),
  cover: b.data.cover,
  mood: b.data.mood ?? 'var(--ink-4)',
  pinned: b.data.pinned === true,
  href: locale === 'en' ? `/en/archives/${b.id}/` : `/archives/${b.id}/`,
}));
const pinnedCount = items.filter((i) => i.pinned).length;
const L = {
  shelf: t('books_title', locale),
  count: locale === 'zh' ? `${items.length} 本` : `${items.length} books`,
  read: locale === 'zh' ? '读这篇书评 →' : 'Read the review →',
  pinned: t('pinned_label', locale),
  expand: locale === 'zh' ? '展开封面与简介' : 'Expand cover and blurb',
};
---

<BaseLayout
  track="reading"
  title={`${L.shelf} · wait4x`}
  description={locale === 'zh' ? '读过的书与一句策展' : 'Books read, one line each'}
>
  <h1 class="page-title">
    {L.shelf}<span class="count mono">{L.count}</span>
    {pinnedCount > 0 && <span class="pinned-count mono">{pinnedCount} {L.pinned}</span>}
  </h1>
  <!-- 标题下说明：由 content/site/pages.yaml 的 books.note/style 驱动 -->
  <p class:list={['page-note', note.className]} style={note.style} set:html={note.html} />

  <ul class="books">
    {items.map((b) => (
      <li>
        <details class="book" style={`--mood:${b.mood}`} open={b.pinned}>
          <summary class="row" aria-label={`${b.title}${b.author ? ' · ' + b.author : ''} — ${L.expand}`}>
            <span class="bar" aria-hidden="true"></span>
            <span class="title">{b.title}</span>
            {b.pinned && (
              <span class="pin" title={L.pinned} role="img" aria-label={L.pinned}>
                {/* 回到顶部图标（↑ + 横线）：不写文字，形状与右侧 chevron 区分 */}
                <svg viewBox="0 0 16 16" width="13" height="13" aria-hidden="true">
                  <path d="M8 12.6V4.2M4.4 7.6 8 4l3.6 3.6" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round"></path>
                  <path d="M3.6 13.6h8.8" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round"></path>
                </svg>
              </span>
            )}
            {b.author && <span class="author">{b.author}</span>}
            <span class="chev" aria-hidden="true">
              <svg viewBox="0 0 16 16" width="14" height="14">
                <path d="M4 6.4 8 10.4l4-4" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"></path>
              </svg>
            </span>
          </summary>
          <div class="body">
            {b.cover && (
              <span class="cover">
                <Image
                  src={b.cover}
                  alt={`${b.title}${locale === 'zh' ? ' 封面' : ' cover'}`}
                  widths={[120, 240]}
                  sizes="120px"
                  loading="lazy"
                />
              </span>
            )}
            <div class="info">
              {b.desc && <p>{b.desc}</p>}
              <a class="link" href={b.href}>{L.read}</a>
            </div>
          </div>
        </details>
      </li>
    ))}
  </ul>
</BaseLayout>

<style>
  .page-title {
    font-size: var(--text-h1);
    color: var(--ink-1);
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
    margin-top: var(--space-5);
  }
  .count { font-size: 13px; color: var(--ink-3); }
  .pinned-count { font-size: 11.5px; color: var(--ink-4); }
  .page-note { font-size: 13px; color: var(--ink-4); margin-block: var(--space-1) var(--space-4); }

  .books { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
  .book {
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color var(--dur) var(--ease);
  }
  .book[open] { border-color: color-mix(in oklab, var(--mood) 42%, var(--line)); }
  .row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 10px var(--space-3);
    cursor: pointer;
    list-style: none;
    transition: background var(--dur) var(--ease);
  }
  .row::-webkit-details-marker { display: none; }
  .row:hover { background: var(--bg-soft); }
  /* 情绪色脊：贯通行的窄条（不是表单色标） */
  .bar {
    width: 8px;
    align-self: stretch;
    margin: 2px 0;
    border-radius: 4px;
    background: var(--mood);
    flex: none;
  }
  .title {
    font-family: var(--font-kai);
    font-size: 15.5px;
    color: var(--paper-ink);
    line-height: 1.4;
    /* 定宽列：作者起点不随书名长短漂移 */
    width: 11em;
    flex: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .pin {
    display: inline-flex;
    color: color-mix(in oklab, var(--mood) 62%, var(--ink-3));
    flex: none;
  }
  .author { font-size: 12.5px; color: var(--ink-3); }
  .author::before { content: '·'; margin-right: 6px; opacity: 0.5; }
  .chev {
    margin-left: auto;
    display: inline-flex;
    color: var(--ink-4);
    transition: rotate var(--dur) var(--ease), color var(--dur) var(--ease);
  }
  .row:hover .chev { color: var(--ink-2); }
  /* 展开时 chevron 转成向上，和左侧「回到顶部」图标形状不同，不会混读 */
  details[open] > .row .chev { rotate: 180deg; }

  .body {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-3);
    border-top: 1px dashed var(--line);
    background: var(--bg-soft);
  }
  .cover { flex: none; width: 96px; border-radius: 4px; overflow: hidden; }
  .cover :global(img) { width: 100%; height: auto; display: block; }
  .info { min-width: 0; }
  .info p {
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--ink-2);
    margin: 0 0 var(--space-2);
    max-width: var(--measure);
  }
  .link {
    font-size: 13px;
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: color-mix(in oklab, var(--accent) 35%, transparent);
    text-underline-offset: 0.2em;
  }

  @media (max-width: 620px) {
    .title { width: auto; flex: 1 1 auto; min-width: 0; }
    .author { display: none; }
    .body { flex-direction: column; }
    .cover { width: 88px; }
  }
  @media (prefers-reduced-motion: reduce) {
    .book, .row, .chev { transition: none; }
  }
</style>