feat(reader): add PDF reading support with outline chapters, CLI blocks, and noise filtering (task 7)

app/static/js/app.js

@@ -2077,12 +2077,12 @@ document.addEventListener('DOMContentLoaded', () => {
             card.innerHTML = `
                 <div>
                     <div class="book-card-top">
-                        <div class="book-cover-icon">${b.source_type === 'epub' ? '📕' : '📄'}</div>
+                        <div class="book-cover-icon">${b.source_type === 'epub' ? '📕' : (b.source_type === 'pdf' ? '📑' : '📄')}</div>
                         <div class="book-card-info">
                             <h4 class="book-card-title" title="${escapeHtml(b.title)}">${escapeHtml(b.title)}</h4>
                             <p class="book-card-author">${escapeHtml(b.author || 'Неизвестный автор')}</p>
                             <div class="book-card-badges">
-                                <span class="badge-format">${escapeHtml(b.source_type)}</span>
+                                <span class="badge-format">${escapeHtml((b.source_type || 'text').toUpperCase())}</span>
                                 <span class="badge-words">${b.total_words ? b.total_words.toLocaleString() + ' слов' : ''}</span>
                             </div>
                         </div>