feat : page /books et section livres accueil (v1.6.26)

- #99 : page publique /books — catalogue des books avec ≥1 article publié
- #100 : section « Livres » sur la homepage (max 6, après redécouvertes)
- CSS : .book-grid, .book-home-card*, .home-section-more
- .htaccess : règle RewriteRule ^books/?$

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

public/assets/css/style.css

@@ -1844,6 +1844,68 @@ main { transition: max-width .22s ease; }
 
 /* ─── Livres ─────────────────────────────────────────────────────── */
 
+/* Grille catalogue /books + section accueil */
+.book-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
+    gap: 1rem;
+}
+.book-home-card {
+    display: flex;
+    flex-direction: column;
+    border-radius: var(--vl-radius);
+    overflow: hidden;
+    text-decoration: none;
+    color: inherit;
+    background: var(--vl-card-bg, var(--bs-body-bg));
+    box-shadow: var(--vl-shadow-sm, 0 1px 3px rgba(0,0,0,.08));
+    transition: transform .15s, box-shadow .15s;
+}
+.book-home-card:hover {
+    transform: translateY(-2px);
+    box-shadow: var(--vl-shadow-md, 0 4px 12px rgba(0,0,0,.14));
+    color: inherit;
+}
+.book-home-card-cover {
+    height: 120px;
+    background-size: cover;
+    background-position: center;
+    flex-shrink: 0;
+}
+.book-home-card-body {
+    padding: .7rem;
+    display: flex;
+    flex-direction: column;
+    gap: .2rem;
+    flex: 1;
+}
+.book-home-card-title {
+    font-weight: 600;
+    font-size: .9rem;
+    line-height: 1.3;
+}
+.book-home-card-desc {
+    font-size: .78rem;
+    color: var(--vl-muted);
+    line-height: 1.4;
+}
+.book-home-card-meta {
+    font-size: .72rem;
+    color: var(--vl-muted);
+    margin-top: auto;
+    padding-top: .3rem;
+}
+.home-section-more {
+    font-size: .75rem;
+    font-weight: 400;
+    margin-left: .5rem;
+    color: var(--vl-accent);
+    text-decoration: none;
+    letter-spacing: 0;
+    text-transform: none;
+}
+.home-section-more:hover { text-decoration: underline; }
+
 /* Bandeau dans un article appartenant à un livre */
 .book-article-banner {
     border-radius: var(--vl-radius);