Bücher: Ordner (eine Ebene) + "Zuletzt gelesen"-Leiste (SW v36)

Ordnername lebt im bereits verschlüsselten meta-Blob (wie Titel/Autor),
daher keine Schema-Änderung nötig — nur ein schlanker Endpoint zum
Aktualisieren von meta_ct/meta_iv ohne die Buchdaten neu hochzuladen.
Die Bücheransicht zeigt jetzt immer oben die letzten 7 gelesenen Titel
als Shortcut-Leiste, darunter Ordner-Kacheln (root) bzw. den Inhalt
eines geöffneten Ordners (kein Verschachteln).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011j4LcoeddwFt6Rw8Wyaknj

books/urls.py

@@ -7,6 +7,7 @@ urlpatterns = [
     path('<int:pk>/data/', views.get_book_data, name='get_book_data'),
     path('<int:pk>/delete/', views.delete_book, name='delete_book'),
     path('<int:pk>/read/', views.set_book_read, name='set_book_read'),
+    path('<int:pk>/meta/', views.update_book_meta, name='update_book_meta'),
     path('<int:pk>/replace-data/', views.replace_book_data, name='replace_book_data'),
     path('<int:pk>/rekey/', views.rekey_book, name='rekey_book'),
     path('<int:pk>/progress/', views.save_progress, name='save_book_progress'),

books/views.py

@@ -89,6 +89,35 @@ def set_book_read(request, pk):
     return JsonResponse({'ok': True, 'is_read': book.is_read})
 
 
+@csrf_exempt
+@require_http_methods(['POST'])
+def update_book_meta(request, pk):
+    """Update only the encrypted metadata blob (e.g. to assign a folder) without touching book bytes."""
+    err = _require_auth(request)
+    if err:
+        return err
+
+    try:
+        book = EBook.objects.get(pk=pk, user=request.user)
+    except EBook.DoesNotExist:
+        return JsonResponse({'error': 'not found'}, status=404)
+
+    try:
+        body = json.loads(request.body)
+    except (json.JSONDecodeError, ValueError):
+        return JsonResponse({'error': 'invalid JSON'}, status=400)
+
+    meta_ct = body.get('meta_ct', '')
+    meta_iv = body.get('meta_iv', '')
+    if not meta_ct or not meta_iv:
+        return JsonResponse({'error': 'meta_ct, meta_iv required'}, status=400)
+
+    book.meta_ct = meta_ct
+    book.meta_iv = meta_iv
+    book.save(update_fields=['meta_ct', 'meta_iv'])
+    return JsonResponse({'ok': True})
+
+
 @csrf_exempt
 @require_http_methods(['POST'])
 def upload_book(request):

static/css/app.css

@@ -1602,6 +1602,89 @@ body.dnd-mode .timer-display {
   cursor: pointer;
 }
 
+/* --- Recently-read shelf (always pinned atop the books view) --- */
+.book-recent-shelf {
+  margin-bottom: 14px;
+}
+.book-recent-title {
+  font-size: 13px;
+  font-weight: 600;
+  margin: 0 0 6px;
+  color: var(--muted, #888);
+}
+.book-recent-row {
+  display: flex;
+  gap: 8px;
+  overflow-x: auto;
+  padding-bottom: 2px;
+}
+.book-recent-item {
+  flex: 0 0 auto;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  max-width: 160px;
+  padding: 8px 10px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: none;
+  text-align: left;
+  cursor: pointer;
+}
+.book-recent-item-title {
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+.book-recent-item-author {
+  font-size: 11px;
+  color: var(--muted, #888);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* --- Book folders (single level) --- */
+.book-folder-grid {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
+  gap: 8px;
+  margin-bottom: 10px;
+}
+.book-folder-tile {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 4px;
+  padding: 12px 8px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: none;
+  cursor: pointer;
+  text-align: center;
+}
+.book-folder-tile-icon {
+  font-size: 22px;
+}
+.book-folder-tile-name {
+  font-size: 13px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  max-width: 100%;
+}
+.book-folder-tile-count {
+  font-size: 11px;
+  color: var(--muted, #888);
+}
+.book-folder-header {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 8px;
+}
+
 /* --- PDF pages --- */
 .pdf-page-wrapper {
   margin: 0 auto 1rem;

static/js/app.js

@@ -3249,11 +3249,11 @@ async function loadBookList() {
       try {
         const metaBuf = await decryptBytes(key, b.meta_iv, b.meta_ct);
         const meta = JSON.parse(new TextDecoder().decode(metaBuf));
-        bookMetaCache[b.id] = {title: meta.title || '?', author: meta.author || '', type: meta.type || 'epub'};
-        decrypted.push({id: b.id, title: meta.title || '?', author: meta.author || '', type: meta.type || 'epub', scroll_fraction: b.scroll_fraction, position_anchor: b.position_anchor || '', uploaded_at: b.uploaded_at, last_read: b.last_read || null, keyOk: true, is_read: !!b.is_read, has_highlights: !!b.has_highlights});
+        bookMetaCache[b.id] = {title: meta.title || '?', author: meta.author || '', type: meta.type || 'epub', filename: meta.filename || '', folder: meta.folder || ''};
+        decrypted.push({id: b.id, title: meta.title || '?', author: meta.author || '', type: meta.type || 'epub', folder: meta.folder || '', scroll_fraction: b.scroll_fraction, position_anchor: b.position_anchor || '', uploaded_at: b.uploaded_at, last_read: b.last_read || null, keyOk: true, is_read: !!b.is_read, has_highlights: !!b.has_highlights});
       } catch (e) {
-        bookMetaCache[b.id] = {title: `Book #${b.id}`, author: '', type: 'epub'};
-        decrypted.push({id: b.id, title: `Book #${b.id}`, author: '', type: 'epub', scroll_fraction: b.scroll_fraction, position_anchor: b.position_anchor || '', uploaded_at: b.uploaded_at, last_read: b.last_read || null, keyOk: false, is_read: !!b.is_read, has_highlights: !!b.has_highlights});
+        bookMetaCache[b.id] = {title: `Book #${b.id}`, author: '', type: 'epub', filename: '', folder: ''};
+        decrypted.push({id: b.id, title: `Book #${b.id}`, author: '', type: 'epub', folder: '', scroll_fraction: b.scroll_fraction, position_anchor: b.position_anchor || '', uploaded_at: b.uploaded_at, last_read: b.last_read || null, keyOk: false, is_read: !!b.is_read, has_highlights: !!b.has_highlights});
       }
     }
     // If local cache is further ahead than the server, push it and use it for display.
@@ -3292,7 +3292,7 @@ async function loadBookList() {
         if (b.last_read) return 1;
         return (b.uploaded_at || '').localeCompare(a.uploaded_at || '');
       });
-      for (const b of cachedBooks) bookMetaCache[b.id] = {title: b.title, author: b.author, type: b.type || 'epub'};
+      for (const b of cachedBooks) bookMetaCache[b.id] = {title: b.title, author: b.author, type: b.type || 'epub', filename: b.filename || '', folder: b.folder || ''};
       const uploadArea = $('book-upload-area');
       if (uploadArea) uploadArea.style.display = 'none';
       renderBookList(cachedBooks);
@@ -3415,23 +3415,23 @@ async function toggleBookRead(bookId, currentlyRead) {
   }
 }
 
-function renderBookList(books) {
-  const listEl = $('book-list');
-  if (!listEl) return;
-  _lastBookListData = books;
-  const visible = _bookShowRead ? books : books.filter(b => !b.is_read);
-  if (!visible.length) {
-    listEl.innerHTML = books.length
-      ? '<p class="muted">Keine ungelesenen Bücher. „Gelesene Bücher anzeigen“ aktivieren, um alle zu sehen.</p>'
-      : '';
-    return;
-  }
-  let html = '';
-  for (const b of visible) {
+// Folder assigned to a book lives inside its encrypted meta blob (like title/author), so the
+// server never sees plaintext folder names — no schema change needed, and it rides along for
+// free in /api/sync/. One level only: folders don't nest.
+let _currentBookFolder = null; // null = root view (folder tiles + unfiled books)
+
+function _recentlyReadBooks(books) {
+  return books
+    .filter(b => b.last_read)
+    .sort((a, b) => b.last_read.localeCompare(a.last_read))
+    .slice(0, 7);
+}
+
+function _renderBookItemHtml(b) {
   const pct = Math.round((b.scroll_fraction || 0) * 100);
   const keyWarning = b.keyOk === false ? '<span title="Wrong encryption key — import the correct key to open this book" style="color:var(--accent,#e63946);margin-left:4px;">⚠ wrong key</span>' : '';
   const broken = _brokenBooks.has(b.id);
-    html += `<div class="book-item" data-book-id="${b.id}">
+  return `<div class="book-item" data-book-id="${b.id}">
       <div class="book-item-info">
         <strong class="book-title">${escapeHtml(b.title)}${keyWarning}${b.is_read ? ' <span class="muted book-read-badge">✓ gelesen</span>' : ''}</strong>
         <span class="muted book-author">${escapeHtml(b.author)}</span>
@@ -3440,13 +3440,127 @@ function renderBookList(books) {
       <div class="book-item-actions">
         ${broken ? `<button class="btn btn-sm btn-danger book-broken-btn" title="Buch konnte nicht geöffnet werden — Datei erneut hochladen" onclick="repairBook(${b.id})">!</button>` : ''}
         ${b.has_highlights ? `<button class="btn btn-sm" title="Markierungen &amp; Notizen herunterladen" onclick="downloadBookAnnotationsFromList(${b.id}, this)">⭳</button>` : ''}
+        <button class="btn btn-sm" title="Ordner zuweisen" onclick="assignBookFolder(${b.id})">📁</button>
         <button class="btn btn-sm" title="${b.is_read ? 'Als ungelesen markieren' : 'Als gelesen markieren'}" onclick="toggleBookRead(${b.id}, ${!!b.is_read})">${b.is_read ? '↺' : '✓'}</button>
         <button class="btn btn-sm" onclick="openBook(${b.id})"${b.keyOk === false ? ' disabled title="Import the correct encryption key first"' : ''}>Open</button>
         <button class="btn btn-sm btn-danger" onclick="deleteBook(${b.id})">Delete</button>
       </div>
     </div>`;
+}
+
+function _openBookFolder(name) {
+  _currentBookFolder = name;
+  renderBookList(_lastBookListData);
+}
+
+function renderBookList(books) {
+  const listEl = $('book-list');
+  if (!listEl) return;
+  _lastBookListData = books;
+
+  if (!books.length) {
+    listEl.innerHTML = '';
+    return;
   }
+
+  let html = '';
+
+  // Always-visible "recently read" shelf, independent of folder navigation and the
+  // read/unread filter below — it's a shortcut back into whatever was open last.
+  const recent = _recentlyReadBooks(books);
+  if (recent.length) {
+    html += '<div class="book-recent-shelf">'
+      + '<h3 class="book-recent-title">Zuletzt gelesen</h3>'
+      + '<div class="book-recent-row">'
+      + recent.map(b => `<button class="book-recent-item" onclick="openBook(${b.id})" title="${escapeHtml(b.title)}">
+          <span class="book-recent-item-title">${escapeHtml(b.title)}</span>
+          ${b.author ? `<span class="book-recent-item-author">${escapeHtml(b.author)}</span>` : ''}
+        </button>`).join('')
+      + '</div></div>';
+  }
+
+  const visible = _bookShowRead ? books : books.filter(b => !b.is_read);
+  if (!visible.length) {
+    html += books.length
+      ? '<p class="muted">Keine ungelesenen Bücher. „Gelesene Bücher anzeigen“ aktivieren, um alle zu sehen.</p>'
+      : '';
     listEl.innerHTML = html;
+    return;
+  }
+
+  const grouped = new Map();
+  for (const b of visible) {
+    const key = b.folder || '';
+    if (!grouped.has(key)) grouped.set(key, []);
+    grouped.get(key).push(b);
+  }
+  // Folder emptied out (last book moved/deleted, or read-filter hid it) — fall back to root.
+  if (_currentBookFolder !== null && !grouped.has(_currentBookFolder)) {
+    _currentBookFolder = null;
+  }
+
+  if (_currentBookFolder === null) {
+    const folderNames = [...grouped.keys()].filter(k => k !== '').sort((a, b) => a.localeCompare(b, 'de'));
+    if (folderNames.length) {
+      html += '<div class="book-folder-grid">'
+        + folderNames.map(name => `<button class="book-folder-tile" data-folder="${escapeHtml(name)}">
+            <span class="book-folder-tile-icon">📁</span>
+            <span class="book-folder-tile-name">${escapeHtml(name)}</span>
+            <span class="book-folder-tile-count">${grouped.get(name).length}</span>
+          </button>`).join('')
+        + '</div>';
+    }
+    html += (grouped.get('') || []).map(_renderBookItemHtml).join('');
+  } else {
+    html += `<div class="book-folder-header">
+        <button class="btn btn-sm" onclick="_openBookFolder(null)">← Alle Ordner</button>
+        <strong>${escapeHtml(_currentBookFolder)}</strong>
+      </div>`;
+    html += grouped.get(_currentBookFolder).map(_renderBookItemHtml).join('');
+  }
+
+  listEl.innerHTML = html;
+  listEl.querySelectorAll('.book-folder-tile').forEach(tile => {
+    tile.addEventListener('click', () => _openBookFolder(tile.dataset.folder));
+  });
+}
+
+async function assignBookFolder(bookId) {
+  const book = _lastBookListData.find(b => b.id === bookId);
+  if (!book) return;
+  const folders = [...new Set(_lastBookListData.map(b => b.folder).filter(Boolean))].sort((a, b) => a.localeCompare(b, 'de'));
+  const hint = folders.length ? ` Vorhandene Ordner: ${folders.join(', ')}.` : '';
+  const result = await customPrompt(`Ordner für „${book.title}“ (leer = kein Ordner).${hint}`, book.folder || '');
+  if (result === null) return;
+  const folder = result.trim();
+  if (folder === (book.folder || '')) return;
+
+  try {
+    const key = await getOrCreateEncKey();
+    const cached = bookMetaCache[bookId] || {};
+    const metaJson = new TextEncoder().encode(JSON.stringify({
+      title: cached.title || book.title,
+      author: cached.author || book.author,
+      filename: cached.filename || '',
+      type: cached.type || book.type || 'epub',
+      folder,
+    }));
+    const metaEnc = await encryptBytes(key, metaJson);
+    const res = await fetch(`/books/${bookId}/meta/`, {
+      method: 'POST',
+      headers: {'Content-Type': 'application/json', 'X-CSRFToken': getCsrfToken()},
+      body: JSON.stringify({meta_ct: metaEnc.ciphertext, meta_iv: metaEnc.iv}),
+    });
+    const data = await res.json();
+    if (!data.ok) throw new Error('Server error');
+    book.folder = folder;
+    bookMetaCache[bookId] = {...cached, folder};
+    _saveBookMeta(_lastBookListData);
+    if (folder) _currentBookFolder = folder;
+    renderBookList(_lastBookListData);
+  } catch (e) {
+    await customAlert('Konnte Ordner nicht ändern: ' + e.message);
+  }
 }
 
 function bookFileSelected(input) {

static/js/sw.js

@@ -2,7 +2,7 @@
  * diora service worker — caches the app shell for offline use.
  */
 
-const CACHE = 'diora-v35';
+const CACHE = 'diora-v36';
 const PODCAST_CACHE = 'diora-podcast-v1';
 const SHELL = [
   '/static/css/app.css',