Fix of an missing parethasys

Web/app.py

@@ -225,12 +225,95 @@ def rollover_student_card_classes(dry_run=False, *, max_class=None, graduate_lab
         if client:
             client.close()
 
-    summary = {'examined': examined, 'updated': updated, 'failures': failures, 'dry_run': bool(dry_run)}
+
+@app.route('/api/library_return_by_code', methods=['POST'])
+def api_library_return_by_code():
+    """
+    Return a library item by scanning its code only (no student card required).
+    This marks active ausleihungen for the item as completed and updates item status.
+    """
+    if 'username' not in session:
+        return jsonify({'ok': False, 'message': 'Nicht angemeldet.'}), 401
+    if not cfg.MODULES.is_enabled('library'):
+        return jsonify({'ok': False, 'message': 'Bibliotheks-Modul ist deaktiviert.'}), 403
+
+    payload = request.get_json(silent=True) or {}
+    item_code_raw = str(payload.get('item_code') or payload.get('code') or '').strip()
+    if not item_code_raw:
+        return jsonify({'ok': False, 'message': 'Mediencode fehlt.'}), 400
+
+    normalized_isbn = normalize_and_validate_isbn(item_code_raw)
+    normalized_code = item_code_raw.upper()
+
+    client = None
     try:
-        _append_audit_event_standalone('student_cards_rollover', summary)
-    except Exception:
-        app.logger.warning('Audit write failed for student_cards_rollover')
-    return summary
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        db = client[MONGODB_DB]
+        items_col = db['items']
+        ausleihungen_col = db['ausleihungen']
+
+        query_or = [
+            {'Code_4': item_code_raw},
+            {'Code_4': normalized_code},
+        ]
+        if normalized_isbn:
+            query_or.append({'ISBN': normalized_isbn})
+
+        item_doc = items_col.find_one({
+            'ItemType': {'$in': LIBRARY_ITEM_TYPES},
+            '$or': query_or
+        })
+
+        if not item_doc:
+            return jsonify({'ok': False, 'message': 'Kein Bibliotheksmedium für diesen Code gefunden.'}), 404
+
+        item_id = str(item_doc['_id'])
+        now = datetime.datetime.now()
+
+        # If item already available -> nothing to return
+        if item_doc.get('Verfuegbar', True):
+            return jsonify({'ok': False, 'message': 'Dieses Medium ist nicht als ausgeliehen markiert.'}), 409
+
+        # Mark active ausleihungen as completed
+        update_result = ausleihungen_col.update_many(
+            {'Item': item_id, 'Status': 'active'},
+            {'$set': {
+                'Status': 'completed',
+                'End': now,
+                'LastUpdated': now
+            }}
+        )
+
+        # Update item status to available
+        borrower_name = str(item_doc.get('User') or '').strip() or ''
+        it.update_item_status(item_id, True, borrower_name)
+
+        _append_audit_event_standalone(
+            event_type='ausleihung_returned_by_code',
+            payload={
+                'channel': 'library_return_code',
+                'item_id': item_id,
+                'item_name': item_doc.get('Name', ''),
+                'completed_records': update_result.modified_count,
+                'performed_by': session.get('username')
+            }
+        )
+
+        return jsonify({
+            'ok': True,
+            'action': 'returned',
+            'item_id': item_id,
+            'item_name': item_doc.get('Name', ''),
+            'completed_records': update_result.modified_count,
+            'message': f"{item_doc.get('Name', 'Medium')} wurde zurückgegeben."
+        }), 200
+    except Exception as e:
+        app.logger.error(f"Error in library return by code: {e}")
+        return jsonify({'ok': False, 'message': 'Fehler beim Verarbeiten der Rückgabe.'}), 500
+    finally:
+        if client:
+            client.close()
+
 
 
 # Admin route to trigger rollover manually
@@ -3231,7 +3314,6 @@ def api_library_items():
 
         query = {
             'ItemType': {'$in': ['book', 'cd', 'dvd', 'schoolbook', 'schulbuch', 'Buch', 'Schulbuch']},
-            'IsGroupedSubItem': {'$ne': True},
             'Deleted': {'$ne': True}
         }
 
@@ -3249,7 +3331,12 @@ def api_library_items():
             'User': 1,
             'Ort': 1,
             'Beschreibung': 1,
-            'Image': 1
+            'Image': 1,
+            'SeriesGroupId': 1,
+            'SeriesCount': 1,
+            'SeriesPosition': 1,
+            'IsGroupedSubItem': 1,
+            'ParentItemId': 1,
         }
 
         total_count = items_db.count_documents(query)
@@ -3277,6 +3364,10 @@ def api_library_items():
                 'Beschreibung': 1,
                 'Image': 1,
                 'ParentItemId': 1,
+                'SeriesGroupId': 1,
+                'SeriesCount': 1,
+                'SeriesPosition': 1,
+                'IsGroupedSubItem': 1,
             }
             child_items = list(items_db.find({
                 'ParentItemId': {'$in': parent_ids_list},
@@ -3390,6 +3481,48 @@ def api_library_items():
         return jsonify({'error': 'An error occurred while fetching library items'}), 500
 
 
+@app.route('/api/library_group/<series_group_id>')
+def api_library_group(series_group_id):
+    """Fetch all items belonging to one library series group."""
+    if 'username' not in session:
+        return jsonify({'items': []}), 401
+
+    try:
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        db = client[MONGODB_DB]
+        items_col = db['items']
+
+        query = {
+            'SeriesGroupId': series_group_id,
+            'Deleted': {'$ne': True},
+            'ItemType': {'$in': ['book', 'cd', 'dvd', 'schoolbook', 'schulbuch', 'Buch', 'Schulbuch']},
+        }
+        projection = {
+            'Name': 1,
+            'ISBN': 1,
+            'Code_4': 1,
+            'Code4': 1,
+            'ItemType': 1,
+            'Ort': 1,
+            'Beschreibung': 1,
+            'SeriesGroupId': 1,
+            'SeriesCount': 1,
+            'SeriesPosition': 1,
+            'IsGroupedSubItem': 1,
+            'ParentItemId': 1,
+        }
+
+        items = list(items_col.find(query, projection).sort([('SeriesPosition', 1), ('Name', 1), ('_id', 1)]))
+        for item in items:
+            item['_id'] = str(item['_id'])
+
+        client.close()
+        return jsonify({'items': items, 'count': len(items), 'series_group_id': series_group_id})
+    except Exception as exc:
+        app.logger.error('Error loading library group %s: %s', series_group_id, exc)
+        return jsonify({'items': [], 'message': 'Gruppe konnte nicht geladen werden.'}), 500
+
+
 @app.route('/api/library_scan_action', methods=['POST'])
 def api_library_scan_action():
     """
@@ -5177,17 +5310,13 @@ def upload_item():
 
     fs = get_gridfs()
 
-    can_access_admin_home = _page_access_allowed(permissions, 'home_admin') and _action_access_allowed(permissions, 'can_manage_settings')
-    if can_access_admin_home:
-        success_redirect_endpoint = 'home_admin'
-    elif cfg.MODULES.is_enabled('library') and _page_access_allowed(permissions, 'home_library'):
-        success_redirect_endpoint = 'home_library'
+    if cfg.MODULES.is_enabled('library') and sanitize_form_value(request.form.get('item_type_input', '')) != "other":
+        success_redirect_endpoint = 'library'
     else:
         success_redirect_endpoint = 'home_admin'
 
     # Detect if request is from mobile device
     is_mobile = 'Mobile' in request.headers.get('User-Agent', '')
-    is_ios = 'iPhone' in request.headers.get('User-Agent', '') or 'iPad' in request.headers.get('User-Agent', '')
     
     # Log mobile request for debugging
     if is_mobile:
@@ -6257,17 +6386,20 @@ def update_group():
 
     # 1. Shared Fields (Group Logic)
     # These apply to every item in the group
-    shared_update = {
-        'Name': data.get('name'),
-        'Ort': data.get('ort'),
-        'Beschreibung': data.get('beschreibung'),
-        'Anschaffungsjahr': data.get('ansch_jahr'),
-        'Anschaffungskosten': data.get('ansch_kost'),
-        'Reservierbar': data.get('reservierbar'),
-        'ISBN': data.get('isbn'),
-        'ItemType': data.get('item_type'),
-        'LastUpdated': datetime.datetime.now()
-    }
+    shared_update = {'LastUpdated': datetime.datetime.now()}
+    for source_key, target_key in (
+        ('name', 'Name'),
+        ('ort', 'Ort'),
+        ('beschreibung', 'Beschreibung'),
+        ('ansch_jahr', 'Anschaffungsjahr'),
+        ('ansch_kost', 'Anschaffungskosten'),
+        ('reservierbar', 'Reservierbar'),
+        ('isbn', 'ISBN'),
+        ('item_type', 'ItemType'),
+    ):
+        value = data.get(source_key)
+        if value is not None:
+            shared_update[target_key] = value
 
     # 2. Individual Updates (Specific Code Logic)
     # Expected format: [{'id': '...', 'code_4': '...'}, ...]

Web/templates/manage_filters.html

@@ -19,7 +19,7 @@
         <div class="col-md-4">
             <div class="card mb-4">
                 <div class="card-header">
-                    <h2 class="card-title h5 mb-0">{{ filter_names.get('1', 'Fach/Kategorie') }} (Filter 1)</h2>
+                    <h2 class="card-title h5 mb-0">{{ filter_names.get('1', 'Jahrgang') }} (Filter 1)</h2>
                 </div>
                 <div class="card-body">
                     <form method="POST" action="{{ url_for('add_filter_value', filter_num=1) }}" class="mb-4">
@@ -67,7 +67,7 @@
         <div class="col-md-4">
             <div class="card mb-4">
                 <div class="card-header">
-                    <h2 class="card-title h5 mb-0">{{ filter_names.get('2', 'System/Bereich') }} (Filter 2)</h2>
+                    <h2 class="card-title h5 mb-0">{{ filter_names.get('2', 'Fach') }} (Filter 2)</h2>
                 </div>
                 <div class="card-body">
                     <form method="POST" action="{{ url_for('add_filter_value', filter_num=2) }}" class="mb-4">
@@ -110,54 +110,6 @@
                 </div>
             </div>
         </div>
-
-        <!-- Filter 3 -->
-        <div class="col-md-4">
-            <div class="card mb-4">
-                <div class="card-header">
-                    <h2 class="card-title h5 mb-0">{{ filter_names.get('3', 'Typ/Art') }} (Filter 3)</h2>
-                </div>
-                <div class="card-body">
-                    <form method="POST" action="{{ url_for('add_filter_value', filter_num=3) }}" class="mb-4">
-                        <div class="input-group">
-                            <input type="text" name="value" class="form-control" placeholder="Neuer Wert..." required>
-                            <button type="submit" class="btn btn-primary">Hinzufügen</button>
-                        </div>
-                    </form>
-                    
-                    <h5 class="mb-3">Vorhandene Werte</h5>
-                    {% if filter3_values %}
-                    <div class="list-group">
-                        {% for value in filter3_values %}
-                        <div class="list-group-item">
-                            <div class="d-flex justify-content-between align-items-center mb-2">
-                                <span>{{ value }}</span>
-                                <div>
-                                    <button type="button" class="btn btn-sm btn-secondary me-1" onclick="toggleEdit('edit-3-{{ loop.index }}')">Bearbeiten</button>
-                                    <form method="POST" action="{{ url_for('remove_filter_value', filter_num=3, value=value) }}" class="d-inline">
-                                        <button type="submit" class="btn btn-sm btn-danger"
-                                                onclick="return confirm('Sind Sie sicher, dass Sie den Wert \"' + '{{ value }}'.replace(/'/g, '\\\'') + '\" löschen möchten?');">
-                                            Entfernen
-                                        </button>
-                                    </form>
-                                </div>
-                            </div>
-                            <form id="edit-3-{{ loop.index }}" method="POST" action="{{ url_for('edit_filter_value', filter_num=3, old_value=value) }}" style="display: none;" class="mt-2">
-                                <div class="input-group input-group-sm">
-                                    <input type="text" name="new_value" class="form-control" value="{{ value }}" required>
-                                    <button type="submit" class="btn btn-primary" onclick="return confirm('Tipp: Das Ändern des Namens aktualisiert auch alle Einträge in der Datenbank, die diesen Filter verwenden. Fortfahren?');">Speichern</button>
-                                    <button type="button" class="btn btn-secondary" onclick="toggleEdit('edit-3-{{ loop.index }}')">Abbrechen</button>
-                                </div>
-                            </form>
-                        </div>
-                        {% endfor %}
-                    </div>
-                    {% else %}
-                    <div class="alert alert-info">Keine Werte definiert.</div>
-                    {% endif %}
-                </div>
-            </div>
-        </div>
     </div>
     
     <div class="alert alert-warning">

Web/templates/upload_admin.html

@@ -761,6 +761,21 @@
         <h1>{{ page_title|default('Artikel hochladen') }}</h1>
         <form method="POST" action="{{ url_for('upload_item') }}" enctype="multipart/form-data">
             <input type="hidden" name="upload_mode" value="{{ upload_mode|default('item') }}">
+
+            {% if show_library_features %}
+            <div class="form-group">
+                <label for="isbn">ISBN/Barcode (für Bild-Suche):</label>
+                <div class="isbn-input-group">
+                    <input type="text" id="isbn" name="isbn" placeholder="ISBN oder Barcode eingeben..." required>
+                    <button type="button" id="scan-isbn-btn" class="fetch-isbn-button">Barcode scannen</button>
+                    <button type="button" class="fetch-isbn-button" onclick="fetchBookInfo('upload')">Informationen abrufen</button>
+                </div>
+                <div id="isbn-scanner" style="width:100%; max-width:520px; display:none; margin-top:10px;"></div>
+                <small id="isbn-scan-status" style="display:block; color:#666; margin-top:6px;">Scannen oder manuell eingeben. Gültige ISBNs helfen beim Abruf von Buchdaten, andere Codes werden trotzdem akzeptiert.</small>
+                <div id="book-info-container" class="book-info-container"></div>
+            </div>
+            {% endif %}
+
             <div class="form-group">
                 <label for="name">Name:</label>
                 <input type="text" id="name" name="name" required>
@@ -784,7 +799,44 @@
                 <label for="beschreibung">Beschreibung:</label>
                 <textarea id="beschreibung" name="beschreibung" required></textarea>
             </div>
-            
+
+            <div class="form-group">
+                <label for="scan_mode">Erfassungs-Modus:</label>
+                <select id="scan_mode" name="scan_mode" class="form-control" onchange="toggleScanMode()">
+                    <option value="single">Einzel-Code (Scanner stoppt nach 1 Scan) ↓ </option>
+                    <option value="continuous">Fortlaufend scannen (Mehrere Codes nacheinander)</option>
+                    <option value="range">Code-Bereich generieren (z.B. ABC-001 bis ABC-010)</option>
+                </select>
+            </div>
+
+            <div id="range_generator_group" class="form-group" style="display:none; background: #f9f9f9; padding: 15px; border-radius: 5px; border: 1px solid #ddd; margin-bottom: 15px;">
+                <label style="font-weight: bold;">Code-Bereich automatisch generieren:</label>
+                <div style="display: flex; gap: 10px; margin-bottom: 10px; align-items: center;">
+                    <input type="text" id="range_prefix" placeholder="Präfix optional (z.B. IT-)" class="form-control" style="flex: 2;">
+                    <input type="number" id="range_start" placeholder="Start (z.B. 1)" class="form-control" style="flex: 1;">
+                    <span style="font-weight: bold;">bis</span>
+                    <input type="text" id="range_end" placeholder="Ende (z.B. 020)" class="form-control" style="flex: 1;">
+                </div>
+                <small style="display:block; color:#666; margin-bottom: 10px;">Tipp: Der Präfix ist optional. Die Anzahl der Ziffern im "Ende"-Feld bestimmt die führenden Nullen (z.B. Ende "050" macht aus Start "1" einen "001").</small>
+                <button type="button" class="btn btn-secondary" onclick="generateCodeRange()">Bereich generieren & einfügen</button>
+            </div>
+
+            <div class="form-group" id="primary_code_group">
+                <label for="code_4">Basis-Code</label>
+                <div style="display: flex; gap: 10px;">
+                    <input type="text" id="code_4" name="code_4" class="form-control" placeholder="Haupt-Barcode" required>
+                    <button type="button" id="scan-code4-btn" class="btn btn-primary">Barcode scannen</button>
+                </div>
+                <div id="code4-scanner" style="display:none; margin-top: 10px;"></div>
+                <small id="code4-scan-status" class="form-text text-muted"></small>
+            </div>
+
+            <div class="form-group" id="individual_codes_group">
+                <label for="individual_codes">Weitere Einzelcodes (je Zeile ein Code)</label>
+                <textarea id="individual_codes" name="individual_codes" rows="6" placeholder="z.B.&#10;ABC-001&#10;ABC-002" class="form-control"></textarea>
+                <small style="display:block; color:#666; margin-top: 5px;">Bei Anzahl > 1 können hier individuelle Codes pro Item gesetzt werden. Der Scanner setzt immer zuerst den Basis-Code im Feld oben; weitere Einzelcodes werden hier angehängt.</small>
+            </div>
+
             {% if show_library_features %}
             <!-- Library Mode: Single Customizable Filter -->
             <div class="filter-inputs">
@@ -800,9 +852,9 @@
                     </select>
                     <small style="display:block; color:#666;">Wählen Sie einen Medientyp aus zur Klassifizierung.</small>
                 </div>
-                <h3>Kategorie/Typ:</h3>
+                <h3>Kategorie/Typ/Fach:</h3>
                 <div class="form-group">
-                    <input type="text" name="library_category" id="library_category" placeholder="z.B. Belletristik, Sachbücher, Nachschlagewerke, etc.">
+                    <input type="text" name="library_category" id="library_category" placeholder="z.B. Belletristik, Sachbücher, Nachschlagewerke, etc. (optional)">
                     <small style="display:block; color:#666;">Geben Sie hier eine beliebige Kategorie ein zur freien Klassifizierung.</small>
                 </div>
             </div>
@@ -902,42 +954,6 @@
                 <label for="anschaffungskosten">Anschaffungskosten (€)</label>
                 <input id="anschaffungskosten" name="anschaffungskosten">
             </div>
-           <div class="form-group">
-                <label for="scan_mode">Erfassungs-Modus:</label>
-                <select id="scan_mode" name="scan_mode" class="form-control" onchange="toggleScanMode()">
-                    <option value="single">Einzel-Code (Scanner stoppt nach 1 Scan)</option>
-                    <option value="continuous">Fortlaufend scannen (Mehrere Codes nacheinander)</option>
-                    <option value="range">Code-Bereich generieren (z.B. ABC-001 bis ABC-010)</option>
-                </select>
-            </div>
-
-            <div id="range_generator_group" class="form-group" style="display:none; background: #f9f9f9; padding: 15px; border-radius: 5px; border: 1px solid #ddd; margin-bottom: 15px;">
-                <label style="font-weight: bold;">Code-Bereich automatisch generieren:</label>
-                <div style="display: flex; gap: 10px; margin-bottom: 10px; align-items: center;">
-                    <input type="text" id="range_prefix" placeholder="Präfix (z.B. IT-)" class="form-control" style="flex: 2;">
-                    <input type="number" id="range_start" placeholder="Start (z.B. 1)" class="form-control" style="flex: 1;">
-                    <span style="font-weight: bold;">bis</span>
-                    <input type="text" id="range_end" placeholder="Ende (z.B. 020)" class="form-control" style="flex: 1;">
-                </div>
-                <small style="display:block; color:#666; margin-bottom: 10px;">Tipp: Die Anzahl der Ziffern im "Ende"-Feld bestimmt die führenden Nullen (z.B. Ende "050" macht aus Start "1" einen "001").</small>
-                <button type="button" class="btn btn-secondary" onclick="generateCodeRange()">Bereich generieren & einfügen</button>
-            </div>
-
-            <div class="form-group" id="primary_code_group">
-                <label for="code_4">Basis-Code</label>
-                <div style="display: flex; gap: 10px;">
-                    <input type="text" id="code_4" name="code_4" class="form-control" placeholder="Haupt-Barcode" required>
-                    <button type="button" id="scan-code4-btn" class="btn btn-primary">Barcode scannen</button>
-                </div>
-                <div id="code4-scanner" style="display:none; margin-top: 10px;"></div>
-                <small id="code4-scan-status" class="form-text text-muted"></small>
-            </div>
-
-            <div class="form-group" id="individual_codes_group">
-                <label for="individual_codes">Weitere Einzelcodes (je Zeile ein Code)</label>
-                <textarea id="individual_codes" name="individual_codes" rows="6" placeholder="z.B.&#10;ABC-001&#10;ABC-002" class="form-control"></textarea>
-                <small style="display:block; color:#666; margin-top: 5px;">Bei Anzahl > 1 können hier individuelle Codes pro Item gesetzt werden. Der Scanner setzt immer zuerst den Basis-Code im Feld oben; weitere Einzelcodes werden hier angehängt.</small>
-            </div>
             <!-- Image upload (hidden for library mode) -->
             <div class="form-group" {% if show_library_features %}style="display:none;"{% endif %}>
                 <label for="images">Bilder/Videos:</label>
@@ -946,27 +962,12 @@
                 <!-- Add image preview area -->
                 <div class="image-preview-container" id="image-preview-container"></div>
             </div>
-            
-            <!-- ISBN fields (library page only) -->
-            {% if show_library_features %}
-            <div class="form-group">
-                <label for="isbn">ISBN/Barcode (für Bild-Suche):</label>
-                <div class="isbn-input-group">
-                    <input type="text" id="isbn" name="isbn" placeholder="ISBN oder Barcode eingeben..." required>
-                    <button type="button" id="scan-isbn-btn" class="fetch-isbn-button">Barcode scannen</button>
-                    <button type="button" class="fetch-isbn-button" onclick="fetchBookInfo('upload')">Informationen abrufen</button>
-                </div>
-                <div id="isbn-scanner" style="width:100%; max-width:520px; display:none; margin-top:10px;"></div>
-                <small id="isbn-scan-status" style="display:block; color:#666; margin-top:6px;">Scannen oder manuell eingeben. Gültige ISBNs helfen beim Abruf von Buchdaten, andere Codes werden trotzdem akzeptiert.</small>
-                <div id="book-info-container" class="book-info-container"></div>
-            </div>
-            
+
             <div class="form-group">
                 <label for="reservierbar" style="display:inline-block; width:auto; margin-right:10px;">Reservierbar:</label>
                 <input type="checkbox" id="reservierbar" name="reservierbar" style="width:auto;">
                 <small style="display:block; color:#666;">Wenn deaktiviert, kann der Artikel nicht im Voraus reserviert werden (Sofort-Ausleihe bleibt möglich).</small>
             </div>
-            {% endif %}
 
             <button type="submit" class="submit-button">{{ 'Bücher hochladen' if show_library_features else 'Artikel hochladen' }}</button>
         </form>
@@ -1023,6 +1024,90 @@
 <script>
     const libraryModuleEnabled = {{ 'true' if library_module_enabled else 'false' }};
 
+    function getFocusableFormFields(form) {
+        if (!form) return [];
+        return Array.from(form.querySelectorAll('input, select, textarea, button'))
+            .filter((element) => {
+                if (element.disabled || element.getAttribute('aria-hidden') === 'true') return false;
+                const style = window.getComputedStyle(element);
+                if (style.display === 'none' || style.visibility === 'hidden') return false;
+                const tagName = element.tagName.toLowerCase();
+                const type = (element.type || '').toLowerCase();
+                return tagName !== 'button' || type !== 'button';
+            });
+    }
+
+    function focusNextFormField(currentField) {
+        const form = currentField && currentField.form ? currentField.form : null;
+        const fields = getFocusableFormFields(form || document);
+        const currentIndex = fields.indexOf(currentField);
+
+        if (currentIndex >= 0) {
+            for (let i = currentIndex + 1; i < fields.length; i++) {
+                const nextField = fields[i];
+                const nextStyle = window.getComputedStyle(nextField);
+                if (nextStyle.display !== 'none' && nextStyle.visibility !== 'hidden') {
+                    nextField.focus();
+                    if (nextField.tagName.toLowerCase() === 'select') {
+                        nextField.click();
+                    }
+                    return true;
+                }
+            }
+        }
+
+        if (form) {
+            const submitButton = form.querySelector('button[type="submit"]');
+            if (submitButton) {
+                submitButton.focus();
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    function handleIsbnLookupFromScanner() {
+        const isbnField = document.getElementById('isbn');
+        if (!isbnField) return false;
+
+        const normalizedIsbn = typeof normalizeIsbnClient === 'function' ? normalizeIsbnClient(isbnField.value) : isbnField.value.trim();
+        if (!normalizedIsbn) return false;
+
+        if (typeof updateIsbnLiveValidation === 'function') {
+            updateIsbnLiveValidation();
+        }
+
+        if (typeof fetchBookInfo === 'function') {
+            fetchBookInfo('upload');
+        }
+
+        return true;
+    }
+
+    document.addEventListener('DOMContentLoaded', function () {
+        document.querySelectorAll('form').forEach(function (form) {
+            form.addEventListener('keydown', function (event) {
+                const target = event.target;
+                if (event.key !== 'Enter') return;
+                if (!target || target.tagName === 'TEXTAREA' && !event.shiftKey) return;
+                const tagName = target.tagName.toLowerCase();
+                const type = (target.type || '').toLowerCase();
+                if (!['input', 'select', 'textarea'].includes(tagName)) return;
+                if (['button', 'submit', 'reset', 'file', 'checkbox', 'radio', 'hidden'].includes(type)) return;
+
+                event.preventDefault();
+
+                if (target.id === 'isbn' || target.name === 'isbn') {
+                    handleIsbnLookupFromScanner();
+                    return;
+                }
+
+                focusNextFormField(target);
+            });
+        });
+    });
+
     // Function to check if a file is a video
     function isVideoFile(filename) {
         const videoExtensions = ['.mp4', '.mov', '.avi', '.mkv', '.webm', '.flv', '.m4v', '.3gp'];
@@ -1194,7 +1279,7 @@
         let generatedCodes = [];
         for (let i = start; i <= end; i++) {
             let numStr = i.toString().padStart(paddingLength, '0');
-            generatedCodes.push(`${prefix}${numStr}`);
+            generatedCodes.push(prefix ? `${prefix}${numStr}` : numStr);
         }
 
         const codeField = document.getElementById('code_4');
@@ -1384,10 +1469,32 @@
             scanModeSelect.addEventListener('change', toggleScanMode);
         }
 
-        // 4. ISBN Live-Validierung
+        // 4. ISBN Live-Validierung und automatische Abfrage nach Scan/Enter
         const isbnInput = document.getElementById('isbn');
-        if (isbnInput && typeof updateIsbnLiveValidation === 'function') {
-            isbnInput.addEventListener('input', updateIsbnLiveValidation);
+        if (isbnInput) {
+            if (typeof updateIsbnLiveValidation === 'function') {
+                isbnInput.addEventListener('input', updateIsbnLiveValidation);
+            }
+
+            let isbnLookupTimer = null;
+            isbnInput.addEventListener('input', function () {
+                clearTimeout(isbnLookupTimer);
+                const normalizedIsbn = typeof normalizeIsbnClient === 'function' ? normalizeIsbnClient(isbnInput.value) : isbnInput.value.trim();
+                if (normalizedIsbn) {
+                    isbnLookupTimer = setTimeout(function () {
+                        handleIsbnLookupFromScanner();
+                    }, 250);
+                }
+            });
+
+            isbnInput.addEventListener('change', function () {
+                if (typeof normalizeIsbnClient === 'function') {
+                    const normalizedIsbn = normalizeIsbnClient(isbnInput.value);
+                    if (normalizedIsbn) {
+                        handleIsbnLookupFromScanner();
+                    }
+                }
+            });
         }
     });
     // Load predefined filter values for dropdowns

Web/templates/user_del.html

@@ -17,15 +17,11 @@
     <div class="user-management-container">
         <h2>Benutzer</h2>
 
-        <form method="POST" action="{{ url_for('admin_anonymize_names') }}" class="mb-3">
-            <button
-                type="submit"
-                class="btn btn-outline-danger"
-                onclick="return confirm('Sollen alle gespeicherten Klarnamen dauerhaft in Synonym-Kuerzel umgewandelt werden?')"
-            >
-                Gespeicherte Namen anonymisieren
-            </button>
-        </form>
+        <div class="mb-3">
+            <a href="{{ url_for('register') }}" class="btn btn-success">
+                Neuen Benutzer registrieren
+            </a>
+        </div>
 
         <div class="filter-bar mb-3">
             <div class="row g-2 align-items-end">