chore: bump version to v0.8.4

.release-version

@@ -1 +1 @@
-v0.7.76
+v0.8.4

Web/app.py

@@ -1,11 +1,3 @@
-'''
-   Copyright 2025-2026 AIIrondev
-
-   Licensed under the Inventarsystem EULA (Endbenutzer-Lizenzvertrag).
-   See Legal/LICENSE for the full license text.
-   Unauthorized commercial use, SaaS hosting, or removal of branding is prohibited.
-   For commercial licensing inquiries: https://github.com/AIIrondev
-'''
 """
 Inventarsystem - Flask Web Application
 
@@ -82,6 +74,7 @@ import mimetypes
 import subprocess
 from Web.modules.inventarsystem.data_protection import (
     decrypt_document_fields,
+    decrypt_text,
     encrypt_document_fields,
     encrypt_soft_deleted_media_pack,
 )
@@ -90,7 +83,7 @@ from Web.modules.inventarsystem.data_protection import (
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
-from tenant import get_tenant_context
+from tenant import get_tenant_context, get_tenant_trial_status, purge_expired_trial_tenants
 
 
 app = Flask(__name__, static_folder='static')  # Correctly set static folder
@@ -162,6 +155,119 @@ def _decrypt_student_card_doc(card_doc):
         return card_doc
     return decrypt_document_fields(card_doc, STUDENT_CARD_ENCRYPTED_FIELDS)
 
+
+def _parse_and_increment_class(klass, max_class=13, graduate_label=''):
+    """Parse a class string like '7A' or '10' and increment the numeric part.
+    If the numeric part would exceed max_class, return graduate_label (or empty).
+    Leaves non-numeric / unparsable values unchanged.
+    """
+    if not klass:
+        return klass
+    s = str(klass).strip()
+    m = re.match(r"^\s*(\d{1,2})(\D.*)?$", s)
+    if not m:
+        return s
+    try:
+        num = int(m.group(1))
+    except Exception:
+        return s
+    suffix = m.group(2) or ''
+    new_num = num + 1
+    if max_class is not None and new_num > int(max_class):
+        return graduate_label or ''
+    return f"{new_num}{suffix}"
+
+
+def rollover_student_card_classes(dry_run=False, *, max_class=None, graduate_label=''):
+    """Increment class years on all student cards.
+
+    Returns a summary dict with counts.
+    """
+    client = None
+    updated = 0
+    examined = 0
+    failures = 0
+    try:
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        db = client[MONGODB_DB]
+        col = db['student_cards']
+        now = datetime.datetime.now()
+
+        cursor = list(col.find({}, {'Klasse': 1}))
+        for doc in cursor:
+            examined += 1
+            try:
+                # Decrypt to work on plain class string
+                plain = dict(doc)
+                plain = _decrypt_student_card_doc(plain)
+                orig = (plain.get('Klasse') or '').strip()
+                new_class = _parse_and_increment_class(orig, max_class=max_class, graduate_label=graduate_label)
+                if new_class != orig:
+                    if dry_run:
+                        updated += 1
+                        continue
+                    payload = {'Klasse': new_class}
+                    encrypted = encrypt_document_fields(payload, STUDENT_CARD_ENCRYPTED_FIELDS)
+                    update_doc = {'Klasse': encrypted.get('Klasse'), 'Aktualisiert': now}
+                    col.update_one({'_id': doc.get('_id')}, {'$set': update_doc})
+                    updated += 1
+            except Exception:
+                failures += 1
+                app.logger.exception('Failed to process student card rollover for %s', doc.get('_id'))
+    finally:
+        if client:
+            client.close()
+
+    summary = {'examined': examined, 'updated': updated, 'failures': failures, 'dry_run': bool(dry_run)}
+    try:
+        _append_audit_event_standalone('student_cards_rollover', summary)
+    except Exception:
+        app.logger.warning('Audit write failed for student_cards_rollover')
+    return summary
+
+
+# Admin route to trigger rollover manually
+@app.route('/admin/trigger_school_year_rollover', methods=['POST'])
+def admin_trigger_school_year_rollover():
+    if 'username' not in session:
+        return jsonify({'ok': False, 'message': 'Nicht angemeldet.'}), 401
+    if not us.check_admin(session['username']):
+        return jsonify({'ok': False, 'message': 'Administratorrechte erforderlich.'}), 403
+
+    max_class = int(os.getenv('INVENTAR_SCHOOL_MAX_CLASS', '13'))
+    graduate_label = os.getenv('INVENTAR_SCHOOL_GRADUATE_LABEL', '')
+    dry = request.args.get('dry', '0') in ('1', 'true', 'yes')
+    summary = rollover_student_card_classes(dry_run=dry, max_class=max_class, graduate_label=graduate_label)
+    return jsonify({'ok': True, 'summary': summary}), 200
+
+
+# Schedule annual rollover job using APScheduler (configurable via env)
+try:
+        if cfg.SCHEDULER_ENABLED:
+            _rollover_month = getattr(cfg, 'SCHOOL_ROLLOVER_MONTH', 9)
+            _rollover_day = getattr(cfg, 'SCHOOL_ROLLOVER_DAY', 1)
+            _rollover_hour = getattr(cfg, 'SCHOOL_ROLLOVER_HOUR', 3)
+            _rollover_minute = getattr(cfg, 'SCHOOL_ROLLOVER_MIN', 0)
+            _rollover_max_class = getattr(cfg, 'SCHOOL_ROLLOVER_MAX_CLASS', 13)
+            _rollover_grad_label = getattr(cfg, 'SCHOOL_ROLLOVER_GRADUATE_LABEL', '')
+
+            _scheduler = BackgroundScheduler()
+            # Use a cron-style yearly job on the configured month/day
+            _scheduler.add_job(
+                func=lambda: rollover_student_card_classes(dry_run=False, max_class=_rollover_max_class, graduate_label=_rollover_grad_label),
+                trigger='cron',
+                month=_rollover_month,
+                day=_rollover_day,
+                hour=_rollover_hour,
+                minute=_rollover_minute,
+                id='school_year_rollover',
+                replace_existing=True
+            )
+            _scheduler.start()
+            app.logger.info('Scheduled annual school year rollover: %s-%s %s:%s', _rollover_month, _rollover_day, _rollover_hour, _rollover_minute)
+except Exception as e:
+    app.logger.warning('Failed to schedule school year rollover: %s', e)
+
 # Thumbnail sizes
 THUMBNAIL_SIZE = cfg.THUMBNAIL_SIZE
 PREVIEW_SIZE = cfg.PREVIEW_SIZE
@@ -362,6 +468,54 @@ def _enforce_active_session_user():
     flash('Ihre Sitzung ist nicht mehr gültig. Bitte erneut anmelden.', 'error')
     return redirect(url_for('login'))
 
+
+@app.before_request
+def _enforce_trial_tenant_expiry():
+    endpoint = request.endpoint or ''
+    if endpoint == 'static' or endpoint.startswith('static'):
+        return None
+
+    if endpoint in {'login', 'logout', 'impressum', 'license'}:
+        return None
+
+    try:
+        ctx = get_tenant_context()
+        tenant_id = ctx.tenant_id if ctx else session.get('tenant_id')
+        if not tenant_id:
+            return None
+
+        trial_status = get_tenant_trial_status(tenant_id)
+        if not trial_status.get('enabled'):
+            return None
+
+        session['trial_status'] = {
+            'enabled': True,
+            'expired': bool(trial_status.get('expired')),
+            'days_left': trial_status.get('days_left'),
+            'expires_at': trial_status.get('expires_at').isoformat() if trial_status.get('expires_at') else None,
+        }
+
+        if not trial_status.get('expired'):
+            return None
+
+        if request.path.startswith('/api/') or request.is_json:
+            return jsonify({
+                'ok': False,
+                'message': 'Diese Testinstanz ist abgelaufen und wurde deaktiviert.',
+                'expired': True,
+            }), 410
+
+        session.pop('username', None)
+        session.pop('admin', None)
+        session.pop('is_admin', None)
+        session.pop('favorites', None)
+        session.pop('favorites_owner', None)
+        flash('Diese Testinstanz ist abgelaufen und wurde deaktiviert.', 'error')
+        return redirect(url_for('login'))
+    except Exception as exc:
+        app.logger.warning(f'Trial expiry check failed: {exc}')
+        return None
+
 @app.before_request
 def _enforce_module_access():
     endpoint = request.endpoint or ''
@@ -380,7 +534,7 @@ def _enforce_module_access():
                 return jsonify({'ok': False, 'message': msg}), 403
             
             flash(msg, 'info')
-            
+
             if name != 'inventory' and cfg.MODULES.is_enabled('inventory'):
                 return redirect(url_for('home'))
             elif name != 'library' and cfg.MODULES.is_enabled('library'):
@@ -1116,6 +1270,7 @@ def inject_version():
         'permission_action_options': PERMISSION_ACTION_OPTIONS,
         'permission_page_options': PERMISSION_PAGE_OPTIONS,
         'permission_presets': us.get_permission_preset_definitions(),
+        'trial_status': session.get('trial_status', {}),
     }
 
 
@@ -1132,6 +1287,16 @@ def create_daily_backup():
     except Exception as e:
         app.logger.error(f"Daily backup creation failed: {e}")
 
+
+def cleanup_expired_trial_tenants():
+    """Remove expired trial tenants from config and MongoDB."""
+    try:
+        purged_tenants = purge_expired_trial_tenants()
+        if purged_tenants:
+            app.logger.warning(f"Purged expired trial tenants: {', '.join(purged_tenants)}")
+    except Exception as exc:
+        app.logger.error(f"Trial tenant cleanup failed: {exc}")
+
 def update_appointment_statuses():
     """
     Aktualisiert automatisch die Status aller Terminplaner-Einträge.
@@ -1327,6 +1492,7 @@ def _initialize_scheduler():
             scheduler.add_job(func=create_daily_backup, trigger="interval", hours=cfg.BACKUP_INTERVAL_HOURS)
             scheduler.add_job(func=update_appointment_statuses, trigger="interval", minutes=cfg.SCHEDULER_INTERVAL_MIN)
             scheduler.add_job(func=create_return_reminders, trigger="interval", minutes=cfg.SCHEDULER_INTERVAL_MIN)
+            scheduler.add_job(func=cleanup_expired_trial_tenants, trigger="interval", hours=1)
             scheduler.start()
             _scheduler_initialized = True
             app.logger.info(f"Scheduler started successfully (interval={cfg.SCHEDULER_INTERVAL_MIN} min)")
@@ -1976,11 +2142,6 @@ def _upload_excel_items(scope='inventory'):
         flash('Nicht angemeldet.', 'error')
         return redirect(url_for('login'))
 
-    permissions = _get_current_user_permissions() or us.build_default_permission_payload('standard_user')
-    if not _action_access_allowed(permissions, 'can_insert'):
-        flash('Einfüge-Rechte erforderlich.', 'error')
-        return redirect(url_for('home'))
-
     is_library_scope = scope == 'library'
     file_field = 'library_excel' if is_library_scope else 'inventory_excel'
     fallback_route = 'library_admin' if is_library_scope else 'upload_admin'
@@ -1992,9 +2153,20 @@ def _upload_excel_items(scope='inventory'):
 
     excel_file = request.files.get(file_field)
     if not excel_file or not excel_file.filename:
-        flash('Bitte eine Excel-Datei auswählen.', 'error')
+        flash('Bitte eine Excel- oder CSV-Datei auswählen.', 'error')
         return redirect(url_for(fallback_route))
 
+    # Permission handling: allow authenticated normal users to import CSV for inventory scope
+    permissions = _get_current_user_permissions() or us.build_default_permission_payload('standard_user')
+    has_insert = _action_access_allowed(permissions, 'can_insert')
+    filename_lower = (excel_file.filename or '').lower()
+    is_csv = filename_lower.endswith('.csv')
+    if not has_insert:
+        # Allow CSV imports for authenticated non-admin users only for inventory (non-library)
+        if not (is_csv and not is_library_scope and 'username' in session):
+            flash('Einfüge-Rechte erforderlich.', 'error')
+            return redirect(url_for('home'))
+
     filename_lower = excel_file.filename.lower()
     if not filename_lower.endswith(('.xlsx', '.csv')):
         flash('Nur .xlsx oder .csv Dateien werden unterstützt.', 'error')
@@ -2297,6 +2469,19 @@ def _upload_excel_items(scope='inventory'):
         flash(f'Excel-Import abgeschlossen: {created_total} Artikel importiert, {len(import_errors)} Zeilen fehlgeschlagen.', 'warning')
     else:
         flash(f'Excel-Import erfolgreich: {created_total} Artikel importiert.', 'success')
+    if is_library_scope:
+        try:
+            _append_audit_event_standalone(
+                event_type='library_bulk_import',
+                payload={
+                    'channel': 'upload_library_excel',
+                    'created_total': created_total,
+                    'processed_rows': len(planned_rows),
+                }
+            )
+        except Exception:
+            app.logger.warning('Audit write failed for library_bulk_import')
+
     return redirect(url_for('home_admin'))
 
 
@@ -2982,6 +3167,7 @@ def api_library_items():
 
         query = {
             'ItemType': {'$in': ['book', 'cd', 'dvd', 'media']},
+            'IsGroupedSubItem': {'$ne': True},
             'Deleted': {'$ne': True}
         }
 
@@ -3004,20 +3190,45 @@ def api_library_items():
 
         total_count = items_db.count_documents(query)
         
-        library_items = list(
-            items_db.find(query, projection)
-            .sort([('Name', 1), ('_id', 1)])
-            .skip(offset)
-            .limit(limit)
-        )
+        raw_items = list(items_db.find(query, projection).sort([('Name', 1), ('_id', 1)]).skip(offset).limit(limit))
 
-        item_ids = [str(item.get('_id')) for item in library_items if item.get('_id')]
+        # Build maps for grouping by parent-child relationship (grouped sub-items)
+        parent_ids_list = [str(itm.get('_id')) for itm in raw_items if itm.get('_id')]
+        children_by_parent = {}
+        child_items = []
+        if parent_ids_list:
+            child_projection = {
+                'Name': 1,
+                'Autor': 1,
+                'Author': 1,
+                'ISBN': 1,
+                'Code_4': 1,
+                'Code4': 1,
+                'ItemType': 1,
+                'Verfuegbar': 1,
+                'Condition': 1,
+                'HasDamage': 1,
+                'User': 1,
+                'Ort': 1,
+                'Beschreibung': 1,
+                'Image': 1,
+                'ParentItemId': 1,
+            }
+            child_items = list(items_db.find({
+                'ParentItemId': {'$in': parent_ids_list},
+                'IsGroupedSubItem': True,
+                'Deleted': {'$ne': True}
+            }, child_projection))
+            for child in child_items:
+                parent_id = str(child.get('ParentItemId') or '')
+                if not parent_id:
+                    continue
+                children_by_parent.setdefault(parent_id, []).append(child)
+
+        all_ids = parent_ids_list + [str(child.get('_id')) for child in child_items if child.get('_id')]
         active_records = []
-        if item_ids:
-            active_records = list(ausleihungen_db.find(
-                {'Item': {'$in': item_ids}, 'Status': 'active'},
-                {'Item': 1, 'User': 1}
-            ))
+        if all_ids:
+            active_records = list(ausleihungen_db.find({'Item': {'$in': all_ids}, 'Status': 'active'}, {'Item': 1, 'User': 1}))
 
         active_item_ids = set()
         active_user_by_item = {}
@@ -3028,32 +3239,76 @@ def api_library_items():
             active_item_ids.add(item_id)
             if item_id not in active_user_by_item:
                 active_user_by_item[item_id] = rec.get('User', '')
-        
-        client.close()
-        
-        # Convert ObjectId to string for JSON serialization
-        for item in library_items:
-            item_id = str(item['_id'])
-            item['_id'] = item_id
-            if item.get('Code4') in (None, '') and item.get('Code_4') not in (None, ''):
-                item['Code4'] = item.get('Code_4')
 
-            condition_value = str(item.get('Condition', '')).strip().lower()
-            has_damage = bool(item.get('HasDamage')) or condition_value == 'destroyed'
-            has_active_borrow = item_id in active_item_ids
+        # Build aggregated list: iterate ordered parent list and include children like inventory module
+        aggregated = []
+        for parent in raw_items:
+            pid = str(parent.get('_id'))
+            children = children_by_parent.get(pid, [])
 
-            if has_damage and not has_active_borrow:
-                item['LibraryDisplayStatus'] = 'damaged'
-            elif has_active_borrow or item.get('Verfuegbar') is False:
-                item['LibraryDisplayStatus'] = 'borrowed'
+            # Compute grouped counts and availability
+            grouped_units = [parent] + children
+            grouped_all_codes = []
+            available_units = []
+            for unit in grouped_units:
+                unit_id = str(unit.get('_id'))
+                code = unit.get('Code_4') or unit.get('Code4') or ''
+                if code:
+                    grouped_all_codes.append(code)
+                if unit.get('Verfuegbar', True):
+                    available_units.append({'id': unit_id, 'code': code, 'label': f"{code} ({unit.get('Name','')})"})
+
+            # Convert ObjectId to string for JSON serialization on parent doc copy
+            doc = dict(parent)
+            doc['_id'] = str(parent.get('_id'))
+            if doc.get('Code4') in (None, '') and doc.get('Code_4') not in (None, ''):
+                doc['Code4'] = doc.get('Code_4')
+
+            condition_value = str(doc.get('Condition', '')).strip().lower()
+            has_damage = bool(doc.get('HasDamage')) or condition_value == 'destroyed'
+            has_active_borrow = any(str(unit.get('_id')) in active_item_ids for unit in grouped_units)
+
+            # Prefer 'available' when any grouped unit is available
+            if has_damage and len(available_units) == 0:
+                doc['LibraryDisplayStatus'] = 'damaged'
+            elif len(available_units) > 0:
+                doc['LibraryDisplayStatus'] = 'available'
+            elif has_active_borrow or doc.get('Verfuegbar') is False:
+                doc['LibraryDisplayStatus'] = 'borrowed'
             else:
-                item['LibraryDisplayStatus'] = 'available'
+                doc['LibraryDisplayStatus'] = 'available'
 
-            item['BorrowedBy'] = active_user_by_item.get(item_id) or item.get('User', '')
+            # Determine borrower: prefer any active borrow on grouped units, fallback to parent.User
+            borrower = ''
+            for unit in grouped_units:
+                u_id = str(unit.get('_id'))
+                if active_user_by_item.get(u_id):
+                    borrower = active_user_by_item.get(u_id)
+                    break
+            if not borrower:
+                borrower = doc.get('User', '')
+            # Decrypt if value is encrypted (decrypt_text returns original if not encrypted)
+            try:
+                borrower = decrypt_text(borrower) if borrower else ''
+            except Exception:
+                # Fallback: keep original string if decryption fails
+                borrower = borrower or ''
 
-        count = len(library_items)
+            doc['BorrowedBy'] = borrower
+
+            doc['GroupedDisplayCount'] = 1 + len(children)
+            doc['Quantity'] = doc['GroupedDisplayCount']
+            doc['AvailableGroupedCount'] = len(available_units)
+            doc['GroupedAvailableUnits'] = available_units
+            doc['GroupedAllCodes'] = grouped_all_codes
+
+            aggregated.append(doc)
+
+        client.close()
+
+        count = len(aggregated)
         return jsonify({
-            'items': library_items,
+            'items': aggregated,
             'offset': offset,
             'limit': limit,
             'count': count,
@@ -3237,28 +3492,82 @@ def api_item_detail(item_id):
         client = MongoClient(MONGODB_HOST, MONGODB_PORT)
         db = client[MONGODB_DB]
         ausleihungen_col = db['ausleihungen']
+        items_col = db['items']
 
-        active_borrow = ausleihungen_col.find_one(
-            {'Item': str(item.get('_id')), 'Status': 'active'},
-            {'User': 1}
-        )
-        client.close()
+        # Determine parent/group id (if this is a child, use its ParentItemId)
+        parent_id = str(item.get('ParentItemId') or str(item.get('_id')))
 
+        # Load all group units (parent + children)
+        group_units_cursor = items_col.find({
+            '$or': [
+                {'_id': ObjectId(parent_id)},
+                {'ParentItemId': parent_id}
+            ],
+            'Deleted': {'$ne': True}
+        })
+        group_units = list(group_units_cursor)
+        if not group_units:
+            # Fallback: just use the single item
+            group_units = [item]
+
+        group_unit_ids = [str(u.get('_id')) for u in group_units if u.get('_id')]
+
+        # Fetch all borrow records for the whole group (active + history)
+        borrow_records = list(ausleihungen_col.find({'Item': {'$in': group_unit_ids}}).sort('Start', -1))
+
+        # Compute availability and damage state across group
+        available_units = [u for u in group_units if u.get('Verfuegbar', True)]
         condition_value = str(item.get('Condition', '')).strip().lower()
         has_damage = bool(item.get('HasDamage')) or condition_value == 'destroyed'
-        if has_damage and not active_borrow:
+
+        if has_damage and len(available_units) == 0:
             status_label = 'Defekt/Zerstört'
-        elif item.get('Verfuegbar') is False or active_borrow:
+        elif len(available_units) > 0:
+            status_label = 'Verfügbar'
+        elif any(r.get('Status') == 'active' for r in borrow_records):
             status_label = 'Ausgeliehen'
         else:
             status_label = 'Verfügbar'
 
+        # Prefer the most recent active borrower across the group
         borrower_value = ''
-        if active_borrow:
-            borrower_value = active_borrow.get('User', '')
-        elif item.get('User'):
-            borrower_value = item.get('User')
-        
+        for rec in borrow_records:
+            if rec.get('Status') == 'active' and rec.get('User'):
+                try:
+                    borrower_value = decrypt_text(rec.get('User'))
+                except Exception:
+                    borrower_value = rec.get('User')
+                break
+        if not borrower_value and item.get('User'):
+            try:
+                borrower_value = decrypt_text(item.get('User'))
+            except Exception:
+                borrower_value = item.get('User')
+
+        # Helper to format datetimes
+        def fmt_dt(dt):
+            try:
+                return dt.strftime('%d.%m.%Y %H:%M') if dt else ''
+            except Exception:
+                return str(dt) if dt else ''
+
+        # Build HTML for borrow records (if any)
+        borrows_html = ''
+        if borrow_records:
+            rows = []
+            for rec in borrow_records:
+                user_raw = rec.get('User') or ''
+                try:
+                    user = decrypt_text(user_raw) if user_raw else ''
+                except Exception:
+                    user = user_raw
+                status = rec.get('Status', '')
+                start = fmt_dt(rec.get('Start'))
+                end = fmt_dt(rec.get('End'))
+                notes = html.escape(str(rec.get('Notes') or ''))
+                rows.append(f"<li><strong>{html.escape(user or '-')}</strong> — {html.escape(status)} — {html.escape(start)} → {html.escape(end)}{(' — ' + notes) if notes else ''}</li>")
+            borrows_html = f"<h3>Ausleihhistorie</h3><ul>{''.join(rows)}</ul>"
+
         # Basic detail HTML
         detail_html = f"""
         <h2>{html.escape(item.get('Name', 'Untitled'))}</h2>
@@ -3267,7 +3576,10 @@ def api_item_detail(item_id):
         <p><strong>Beschreibung:</strong> {html.escape(item.get('Beschreibung', '-'))}</p>
         <p><strong>Status:</strong> {html.escape(status_label)}</p>
         {f'<p><strong>Ausgeliehen von:</strong> {html.escape(str(borrower_value))}</p>' if borrower_value and status_label == 'Ausgeliehen' else ''}
+        {borrows_html}
         """
+        client.close()
+        return detail_html, 200
         return detail_html, 200
     except Exception as e:
         app.logger.error(f"Error fetching item detail: {e}")
@@ -3338,6 +3650,19 @@ def api_library_item_update(item_id):
             update_doc['ISBN'] = ''
 
         items_col.update_one({'_id': ObjectId(item_id)}, {'$set': update_doc})
+        try:
+            _append_audit_event_standalone(
+                event_type='library_item_updated',
+                payload={
+                    'channel': 'library_table',
+                    'item_id': item_id,
+                    'updated_fields': list(update_doc.keys()),
+                    'isbn': update_doc.get('ISBN', ''),
+                }
+            )
+        except Exception:
+            app.logger.warning('Audit write failed for library_item_updated')
+
         client.close()
 
         return jsonify({'ok': True, 'message': 'Bibliotheksmedium aktualisiert.'}), 200
@@ -4749,16 +5074,15 @@ def upload_item():
 
     item_isbn = ''
     item_type = 'general'
-    if cfg.MODULES.is_enabled('library'):
-        item_isbn = normalize_and_validate_isbn(isbn_raw)
-        if isbn_raw and not item_isbn:
-            error_msg = 'Ungültige ISBN. Bitte ISBN-10 oder ISBN-13 verwenden.'
-            if is_mobile:
-                return jsonify({'success': False, 'message': error_msg}), 400
-            flash(error_msg, 'error')
-            return redirect(url_for(success_redirect_endpoint))
-        if item_isbn:
+    if cfg.MODULES.is_enabled('library') and isbn_raw:
+        normalized_isbn = normalize_and_validate_isbn(isbn_raw)
+        if normalized_isbn:
+            item_isbn = normalized_isbn
             item_type = 'book'
+        else:
+            item_isbn = isbn_raw
+            if upload_mode == 'library':
+                item_type = 'book'
 
     if upload_mode == 'library':
         if not cfg.MODULES.is_enabled('library'):
@@ -4767,8 +5091,8 @@ def upload_item():
                 return jsonify({'success': False, 'message': error_msg}), 400
             flash(error_msg, 'error')
             return redirect(url_for(success_redirect_endpoint))
-        if not item_isbn:
-            error_msg = 'Für Bücher ist eine gültige ISBN erforderlich.'
+        if not isbn_raw:
+            error_msg = 'Für Bücher ist eine ISBN oder ein Barcode erforderlich.'
             if is_mobile:
                 return jsonify({'success': False, 'message': error_msg}), 400
             flash(error_msg, 'error')
@@ -5558,7 +5882,21 @@ def upload_item():
     # Create QR code for the item (deactivated)
     # create_qr_code(str(item_id))
         success_msg = f'Element wurde erfolgreich hinzugefügt ({len(created_item_ids)} erstellt)'
-        
+        if upload_mode == 'library':
+            try:
+                _append_audit_event_standalone(
+                    event_type='library_item_created',
+                    payload={
+                        'channel': 'upload_admin',
+                        'created_item_ids': created_item_ids,
+                        'created_count': len(created_item_ids),
+                        'isbn': item_isbn,
+                        'codes': created_item_ids and [it.get_item(cid).get('Code_4') for cid in created_item_ids] or []
+                    }
+                )
+            except Exception:
+                app.logger.warning('Audit write failed for library_item_created')
+
         if is_mobile:
             return jsonify({
                 'success': True, 
@@ -5862,6 +6200,79 @@ def delete_item(id):
     return redirect(url_for('home_admin'))
 
 
+@app.route('/delete_library_item/<id>', methods=['POST'])
+def delete_library_item(id):
+    """
+    Route to soft-delete library items (books/media) revisionssicher.
+    Requires admin and library module enabled.
+    """
+    if 'username' not in session:
+        flash('Nicht angemeldet.', 'error')
+        return redirect(url_for('login'))
+    if not us.check_admin(session['username']):
+        flash('Administratorrechte erforderlich.', 'error')
+        return redirect(url_for('login'))
+    if not cfg.MODULES.is_enabled('library'):
+        flash('Bibliotheks-Modul ist deaktiviert.', 'error')
+        return redirect(url_for('home_admin'))
+
+    # Verify item exists and is a library item
+    try:
+        item_doc = it.get_item(id)
+    except Exception:
+        item_doc = None
+
+    if not item_doc:
+        flash('Element nicht gefunden.', 'error')
+        return redirect(url_for('library_admin'))
+
+    if item_doc.get('ItemType') not in LIBRARY_ITEM_TYPES:
+        flash('Element ist kein Bibliotheksmedium.', 'error')
+        return redirect(url_for('library_admin'))
+
+    group_item_ids = it.get_group_item_ids(id)
+    if not group_item_ids:
+        flash('Element nicht gefunden.', 'error')
+        return redirect(url_for('library_admin'))
+
+    client = None
+    try:
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        db = client[MONGODB_DB]
+        result = _soft_delete_item_groups(db, [id], session.get('username', ''))
+        success = bool(result.get('success'))
+        soft_deleted = int(result.get('soft_deleted_items', 0))
+        archived_files = int((result.get('archive') or {}).get('archived_files', 0))
+
+        try:
+            _append_audit_event_standalone(
+                event_type='library_item_deleted',
+                payload={
+                    'root_item_id': id,
+                    'group_item_ids': result.get('group_item_ids', []),
+                    'soft_deleted_items': soft_deleted,
+                    'archived_files': archived_files,
+                }
+            )
+        except Exception:
+            app.logger.warning('Audit write failed for library_item_deleted')
+
+    except Exception as e:
+        app.logger.error(f"Error deleting library item {id}: {e}")
+        success = False
+        archived_files = 0
+    finally:
+        if client:
+            client.close()
+
+    if success:
+        flash(f'Bibliotheksmedium revisionssicher deaktiviert ({soft_deleted} Versionen, {archived_files} Mediendateien archiviert).', 'success')
+    else:
+        flash('Fehler beim Löschen des Bibliotheksmediums.', 'error')
+
+    return redirect(url_for('library_admin'))
+
+
 @app.route('/bulk_delete_items', methods=['POST'])
 def bulk_delete_items():
     """Soft-delete multiple selected item groups in one request."""
@@ -6109,6 +6520,20 @@ def report_damage(id):
         except Exception as log_err:
             app.logger.warning(f"Damage report log write failed for item {id}: {log_err}")
 
+        try:
+            _append_audit_event_standalone(
+                event_type='item_damage_reported',
+                payload={
+                    'item_id': id,
+                    'item_name': item_doc.get('Name', ''),
+                    'reported_by': session.get('username'),
+                    'description': description,
+                    'damage_count': damage_count,
+                }
+            )
+        except Exception:
+            app.logger.warning('Audit write failed for item_damage_reported')
+
         return jsonify({
             'success': True,
             'message': 'Schaden erfolgreich erfasst.',
@@ -6191,6 +6616,18 @@ def mark_damage_repaired(id):
         except Exception as log_err:
             app.logger.warning(f"Damage repair log write failed for item {id}: {log_err}")
 
+        try:
+            _append_audit_event_standalone(
+                event_type='item_damage_repaired',
+                payload={
+                    'item_id': id,
+                    'resolved_by': session.get('username'),
+                    'resolved_count': len(open_reports),
+                }
+            )
+        except Exception:
+            app.logger.warning('Audit write failed for item_damage_repaired')
+
         return jsonify({
             'success': True,
             'message': 'Schäden als repariert markiert.',

Web/modules/database/items.py

@@ -18,14 +18,6 @@ Collection Structure:
   - Optional fields: Images, Filter, Filter2, Filter3, Anschaffungsjahr, Anschaffungskosten, Code_4
   - Status fields: Verfuegbar, User (if currently borrowed)
 """
-'''
-   Copyright 2025-2026 AIIrondev
-
-   Licensed under the Inventarsystem EULA (Endbenutzer-Lizenzvertrag).
-   See Legal/LICENSE for the full license text.
-   Unauthorized commercial use, SaaS hosting, or removal of branding is prohibited.
-   For commercial licensing inquiries: https://github.com/AIIrondev
-'''
 from bson.objectid import ObjectId
 import datetime
 import Web.modules.database.settings as cfg

Web/modules/database/settings.py

@@ -71,6 +71,15 @@ DEFAULTS = {
         'logo_path': '',
         'logo_thumb': '',
         'logo_thumb': '',
+        # School-level rollover configuration for advancing class years
+        'rollover': {
+            'month': 9,
+            'day': 1,
+            'hour': 3,
+            'minute': 0,
+            'max_class': 13,
+            'graduate_label': ''
+        },
     },
     'schoolPeriods': {
         "1": {"start": "08:00", "end": "08:45", "label": "1. Stunde (08:00 - 08:45)"},
@@ -100,9 +109,29 @@ DEFAULTS = {
 }
 
 # Load configuration file
-CONFIG_PATH = os.path.join(BASE_DIR, '..', 'config.json')
+def _resolve_config_path():
+    """Resolve runtime config path with robust fallbacks for Docker deployments."""
+    env_path = os.getenv('INVENTAR_CONFIG_PATH', '').strip()
+    if env_path:
+        return env_path
+
+    candidates = [
+        os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(BASE_DIR))), 'config.json'),
+        os.path.join(os.path.dirname(os.path.dirname(BASE_DIR)), 'config.json'),
+        os.path.join(os.path.dirname(BASE_DIR), 'config.json'),
+        os.path.join(BASE_DIR, '..', 'config.json'),
+    ]
+
+    for candidate in candidates:
+        if os.path.isfile(candidate):
+            return os.path.abspath(candidate)
+
+    return os.path.abspath(candidates[0])
+
+
+CONFIG_PATH = _resolve_config_path()
 try:
-    with open(CONFIG_PATH, 'r') as f:
+    with open(CONFIG_PATH, 'r', encoding='utf-8') as f:
         _conf = json.load(f)
 except Exception:
     _conf = {}
@@ -135,10 +164,19 @@ def _get_int_env(name, default):
         return int(default)
 
 def get_version():
-    with open(os.path.join(BASE_DIR, '..', '..', '..', '.docker-build.env'), 'r') as f:
-        for l in f:
-            if l.startswith('INVENTAR_APP_IMAGE='):
-                return l.split(':', 1)[1].strip()
+    # Prefer an explicit release marker if present (created by release process).
+    project_root = os.path.abspath(os.path.join(BASE_DIR, '..', '..', '..'))
+    release_file = os.path.join(project_root, '.docker-build.env')
+    try:
+        if os.path.isfile(release_file):
+            with open(release_file, 'r', encoding='utf-8') as f:
+                var = f.readline()
+                for i in var:
+                    i = i.split(":")
+                    i.pop[0]
+                    return str(i)
+    except Exception:
+        pass
 
 # Expose settings
 APP_VERSION = get_version()
@@ -178,10 +216,30 @@ SSL_ENABLED = _get(_conf, ['ssl', 'enabled'], DEFAULTS['ssl']['enabled'])
 SSL_CERT = _get(_conf, ['ssl', 'cert'], DEFAULTS['ssl']['cert'])
 SSL_KEY = _get(_conf, ['ssl', 'key'], DEFAULTS['ssl']['key'])
 
+# Email settings
+EMAIL_ENABLED = _get(_conf, ['email', 'enabled'], False)
+EMAIL_SMTP_HOST = _get(_conf, ['email', 'smtp_host'], 'smtp.gmail.com')
+EMAIL_SMTP_PORT = int(_get(_conf, ['email', 'smtp_port'], 587))
+EMAIL_USE_TLS = bool(_get(_conf, ['email', 'use_tls'], True))
+EMAIL_USERNAME = _get(_conf, ['email', 'username'], '')
+EMAIL_PASSWORD = _get(_conf, ['email', 'password'], '')
+EMAIL_FROM_ADDRESS = _get(_conf, ['email', 'from_address'], EMAIL_USERNAME)
+EMAIL_DEFAULT_SENDER_NAME = _get(_conf, ['email', 'default_sender_name'], 'Inventarsystem')
+EMAIL_TIMEOUT_SECONDS = int(_get(_conf, ['email', 'timeout_seconds'], 30))
+
 # School periods
 SCHOOL_PERIODS = _get(_conf, ['schoolPeriods'], DEFAULTS['schoolPeriods'])
 SCHOOL_INFO_DEFAULT = _get(_conf, ['school'], DEFAULTS['school'])
 
+# School rollover configuration (can be set in config.json under `school.rollover`)
+SCHOOL_ROLLOVER = _get(_conf, ['school', 'rollover'], DEFAULTS['school'].get('rollover', {}))
+SCHOOL_ROLLOVER_MONTH = int(os.getenv('INVENTAR_SCHOOL_ROLLOVER_MONTH', str(SCHOOL_ROLLOVER.get('month', 9))))
+SCHOOL_ROLLOVER_DAY = int(os.getenv('INVENTAR_SCHOOL_ROLLOVER_DAY', str(SCHOOL_ROLLOVER.get('day', 1))))
+SCHOOL_ROLLOVER_HOUR = int(os.getenv('INVENTAR_SCHOOL_ROLLOVER_HOUR', str(SCHOOL_ROLLOVER.get('hour', 3))))
+SCHOOL_ROLLOVER_MIN = int(os.getenv('INVENTAR_SCHOOL_ROLLOVER_MIN', str(SCHOOL_ROLLOVER.get('minute', 0))))
+SCHOOL_ROLLOVER_MAX_CLASS = int(os.getenv('INVENTAR_SCHOOL_MAX_CLASS', str(SCHOOL_ROLLOVER.get('max_class', 13))))
+SCHOOL_ROLLOVER_GRADUATE_LABEL = os.getenv('INVENTAR_SCHOOL_GRADUATE_LABEL', str(SCHOOL_ROLLOVER.get('graduate_label', '')))
+
 # Optional feature modules
 TENANT_CONFIGS = _get(_conf, ['tenants'], {})
 

Web/modules/database/termine.py

@@ -0,0 +1,110 @@
+"""
+Apointment Managment
+=========================
+
+This module manages appointments in the database. It provides comprehensive 
+functionality for creating, updating, retrieving appointments items.
+
+Key Features:
+- Creating and updating appointments
+- Retrieving items by ID
+- Managing time slots
+- client retrival
+
+Collection Structure:
+- appointments:
+  - Required fields: user, start_date, end_date, daytime, slots, slot_time
+  - Optional fields: Images, Filter, Filter2, Filter3, Anschaffungsjahr, Anschaffungskosten, Code_4
+  - Status fields: slots_used_by
+"""
+import Web.modules.database.settings as cfg
+from Web.modules.database.settings import MongoClient
+from bson.objectid import ObjectId
+import datetime 
+
+def _active_record_query(extra_query=None):
+    """Build a query that excludes logically deleted records."""
+    base_query = {'Deleted': {'$ne': True}}
+    if extra_query:
+        base_query.update(extra_query)
+    return base_query
+
+
+def add(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght: int, user: str, mail: list=[], note:str=""):
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = client[cfg.MONGODB_DB]
+        items = db['appointments']
+
+        item = {
+            'date_start': date_start,
+            'date_end': date_end,
+            'time_span': time_span,
+            'slots': slots,
+            'slot_lenght': slot_lenght,
+            'user': user,
+            'mail': mail,
+            'note': note,
+            'slots_booked': [], # -> [(start_time, name), ...]the list gets there indexes as the slot 1-defined so is can be counted without an extra variable
+            'Created': datetime.datetime.now(),
+            'LastUpdated': datetime.datetime.now()
+        }
+        result = items.insert_one(item)
+        return result.inserted_id
+    except Exception as e:
+        print(f"Exception accured: {e}")
+
+
+def get_item(id):
+    """
+    Retrieve a specific appointment by its ID.
+    
+    Args:
+        id (str): ID of the appointsment to retrieve
+        
+    Returns:
+        dict: The appointment document or None if not found
+    """
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = client[cfg.MONGODB_DB]
+        items = db['appointments']
+        item = items.find_one(_active_record_query({'_id': ObjectId(id)}))
+        client.close()
+        return item
+    except Exception as e:
+        print(f"Error retrieving item: {e}")
+        return None
+
+def update(id,slots_used: list):
+    """
+    Update an existing appointment.
+    
+    Args:
+        id (str): ID of the item to update
+        
+        
+    Returns:
+        bool: True if successful, False otherwise
+    """
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = client[cfg.MONGODB_DB]
+        items = db['appointments']
+
+        update_data = {
+            'slots_booked': [slots_used],
+            'LastUpdated': datetime.datetime.now()
+        }
+
+        result = items.update_one(
+            {'_id': ObjectId(id)},
+            {'$set': update_data}
+        )
+
+        client.close()
+        return result.modified_count > 0
+    except Exception as e:
+        print(f"Error updating item: {e}")
+        return False
+

Web/modules/emailservice/email.py

@@ -0,0 +1,47 @@
+from email.mime.text import MIMEText
+from email.mime.multipart import MIMEMultipart
+import smtplib
+
+import Web.modules.database.settings as cfg
+
+
+def _build_smtp_client():
+    smtp = smtplib.SMTP(cfg.EMAIL_SMTP_HOST, cfg.EMAIL_SMTP_PORT, timeout=cfg.EMAIL_TIMEOUT_SECONDS)
+    smtp.ehlo()
+    if cfg.EMAIL_USE_TLS:
+        smtp.starttls()
+        smtp.ehlo()
+    if cfg.EMAIL_USERNAME:
+        smtp.login(cfg.EMAIL_USERNAME, cfg.EMAIL_PASSWORD or '')
+    return smtp
+
+def send(email: list, subject: str, note: str, sender: str) -> bool:
+  """
+  Sends the email with the link to the Clients
+
+  Input:
+  - email: Email list of all the addresses to send the link to ["","",""]
+  - subject: Subject of the email
+  - note: Note that is send with the Emails
+
+  Output:
+  - bool: true if the sending worked and false if it didnt
+  """
+  msg = MIMEMultipart()
+  msg['Subject'] = subject
+  msg['From'] = sender or cfg.EMAIL_FROM_ADDRESS or cfg.EMAIL_USERNAME
+  msg['To'] = ', '.join(email) if isinstance(email, (list, tuple)) else str(email)
+  msg.attach(MIMEText(note))
+  smtp = None
+  try:
+    smtp = _build_smtp_client()
+    smtp.sendmail(from_addr=msg['From'], to_addrs=email, msg=msg.as_string())
+    return True
+  except Exception:
+    return False
+  finally:
+    try:
+      if smtp:
+        smtp.quit()
+    except Exception:
+      pass

Web/modules/terminplaner/__init__.py

@@ -1 +1 @@
-print("hello")
+# Web.modules package initialization

Web/modules/terminplaner/executive.py

@@ -0,0 +1,51 @@
+"""
+Class for all funktions of the executive -> Lehrer
+"""
+import datetime
+import emailservice.email as mail_service
+import Web.modules.database.termine as termin
+import Web.modules.database.settings as cfg
+from tenant import get_tenant_context
+
+def new(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght: int, user: str, mail: list=[], note:str="") -> str:
+    """
+    Generates a link for the executive to send to his clients to book a time Slot
+    
+    Input:
+    - date_start: start of the time frae area
+    - date_end: end of the time frame area
+    - time_span: Time window for the days as a list [(first day Time Frame), (second day Time frame), (third etc.)]
+    - slots: amount of slots that are available
+    - slot_lenght: the lenght of a slot in minutes
+
+    Output:
+    - link: The link for the user to send to the clients
+    """
+    id = termin.add(date_start, date_end, time_span, slots, slot_lenght, user, mail, note)
+
+    tenant_context = get_tenant_context()
+    subdomain = ''
+    if tenant_context:
+        subdomain = getattr(tenant_context, 'subdomain', '') or getattr(tenant_context, 'tenant_id', '') or ''
+
+    host = f"https://{subdomain}.invario.eu" if subdomain else "invario.eu"
+    link = host + "/terminplaner/client" + "?" + "client_id=" + id 
+    subject = f"Terminanfrage von {user}"
+    note_link = note + f"Bitte klicken sie auf den folgenden Link um einen Termin zu vereinbaren: {link}"
+    mail_service.send(mail, subject, note_link)
+    return link
+    
+        
+def book_slot(id, date_start_time, name):
+    """
+    Updates slot for the booking per a id
+
+    Input:
+    - id: the id is the id you get from the
+    - date_start_time: the date of the booking that was selected with date and time
+    - name: name that the client gave himself
+    
+    Output:
+    - bool: if worked or not
+    """
+    termin.update()

Web/templates/base.html

@@ -930,6 +930,29 @@
                 box-shadow: none;
             }
 
+            .navbar-nav .nav-item.dropdown > .nav-link.dropdown-toggle,
+            .user-menu-wrap > .user-menu-btn {
+                display: none !important;
+            }
+
+            .navbar-nav .nav-item.dropdown > .dropdown-menu,
+            .user-menu-wrap > .dropdown-menu {
+                display: block !important;
+                position: static !important;
+                float: none !important;
+                transform: none !important;
+                inset: auto !important;
+                width: 100%;
+            }
+
+            .navbar-nav .nav-item.dropdown > .dropdown-menu {
+                margin-top: 0;
+            }
+
+            .user-menu-wrap > .dropdown-menu {
+                margin-top: 8px;
+            }
+
             .navbar-nav .dropdown-item {
                 color: rgba(255, 255, 255, 0.9);
                 padding: 12px 16px;
@@ -974,6 +997,7 @@
                 order: 3;
                 width: 100%;
                 margin: 0;
+                display: none !important;
             }
 
             .function-search-form {
@@ -2055,42 +2079,9 @@
                         return;
                     }
 
-                    // Mobile menu is collapsed: avoid hiding links preemptively.
-                    if (navCollapse && !navCollapse.classList.contains('show')) {
-                        restoreAllNavItems();
-                        return;
-                    }
-
+                    // Mobile burger menu should show the full list without overflow pruning.
                     restoreAllNavItems();
-
-                    const hiddenSources = [];
-                    let candidates = collectTopLevelNavSources();
-                    const overflowBuffer = 12;
-
-                    while (isNavOverflowing(overflowBuffer) && candidates.length > 0) {
-                        const toHide = pickNextNavItemToHide(candidates);
-                        if (!toHide) {
-                            break;
-                        }
-                        toHide.style.display = 'none';
-                        hiddenSources.unshift(toHide);
-                        candidates = collectTopLevelNavSources();
-                    }
-
-                    rebuildOverflowControl(hiddenSources);
-
-                    // One final pass in case the overflow menu label/count itself changed row width.
-                    candidates = collectTopLevelNavSources();
-                    while (isNavOverflowing(overflowBuffer) && candidates.length > 0) {
-                        const toHide = pickNextNavItemToHide(candidates);
-                        if (!toHide) {
-                            break;
-                        }
-                        toHide.style.display = 'none';
-                        hiddenSources.unshift(toHide);
-                        rebuildOverflowControl(hiddenSources);
-                        candidates = collectTopLevelNavSources();
-                    }
+                    return;
                 }
 
                 let resizeTimer = null;

Web/templates/library.html

@@ -72,6 +72,7 @@
     </div>
 
     <!-- Table Header (only in table mode) -->
+    <div class="library-table-wrapper">
     <div class="table-header" id="tableHeader" style="display: none;">
         <div class="table-row">
             <div class="table-cell title-cell">Titel</div>
@@ -166,6 +167,7 @@
             </div>
         {% endif %}
     </div>
+    </div>
 </div>
 
 <!-- Detail Modal -->
@@ -720,5 +722,20 @@ function onScanError(error) {
     background: #fce8e6;
     color: #b3261e;
 }
+
+/* Mobile: allow horizontal scrolling for table-mode views */
+@media (max-width: 900px) {
+    .library-table-wrapper {
+        overflow-x: auto;
+        -webkit-overflow-scrolling: touch;
+        width: 100%;
+    }
+    .library-table-wrapper .table-row {
+        min-width: 720px; /* allow table to have intrinsic width and be scrolled */
+    }
+    .table-header, .item-content.table-mode {
+        display: block; /* keep rows stacked but allow horizontal scroll */
+    }
+}
 </style>
 {% endblock %}

Web/templates/library_table.html

@@ -513,12 +513,13 @@
         <table class="library-items-table">
             <thead>
                 <tr>
-                    <th style="width: 25%;">Titel</th>
-                    <th style="width: 15%;">Autor/Künstler</th>
+                    <th style="width: 24%;">Titel</th>
+                    <th style="width: 14%;">Autor/Künstler</th>
                     <th style="width: 12%;">ISBN/Code</th>
-                    <th style="width: 10%;">Typ</th>
+                    <th style="width: 8%;">Typ</th>
+                    <th style="width: 8%;">Anzahl</th>
                     <th style="width: 12%;">Status</th>
-                    <th style="width: 26%;">Aktionen</th>
+                    <th style="width: 22%;">Aktionen</th>
                 </tr>
             </thead>
             <tbody id="itemsTableBody">
@@ -603,7 +604,7 @@
             }
         } catch (error) {
             console.error('Error loading library items:', error);
-            document.getElementById('itemsTableBody').innerHTML = '<tr><td colspan="6" style="text-align:center; color:#999;">Fehler beim Laden der Bibliothekselemente.</td></tr>';
+            document.getElementById('itemsTableBody').innerHTML = '<tr><td colspan="7" style="text-align:center; color:#999;">Fehler beim Laden der Bibliothekselemente.</td></tr>';
         } finally {
             pagingState.loading = false;
         }
@@ -707,6 +708,7 @@
                 <td>${escapeHtml(item.Autor || item.Author || '-')}</td>
                 <td>${escapeHtml(item.ISBN || item.Code_4 || item.Code4 || '-')}</td>
                 <td>${getItemTypeLabel(item.ItemType || 'book')}</td>
+                <td style="font-weight:600; text-align:center;">${item.Quantity || item.GroupedDisplayCount || 1}</td>
                 <td>
                     <span class="table-status ${statusClass}">
                         ${statusText}
@@ -718,6 +720,7 @@
                         ${actionLabel}
                     </button>
                     ${canEditLibraryItems ? `<button class="button" style="background:#0ea5e9;color:#fff;" onclick="openEditLibraryItem('${item._id}')">Bearbeiten</button>` : ''}
+                    ${canEditLibraryItems ? `<button class="button" style="background:#dc2626;color:#fff; margin-left:6px;" onclick="confirmDeleteLibraryItem('${item._id}')">Löschen</button>` : ''}
                 </td>
             </tr>
                 `;
@@ -737,6 +740,47 @@
         }
     }
 
+    // Confirm and call library item delete endpoint
+    function confirmDeleteLibraryItem(itemId) {
+        if (!itemId) return;
+        if (!confirm('Dieses Bibliotheksmedium revisionssicher löschen? Diese Aktion deaktiviert alle zugehörigen Exemplare und archiviert Medien.')) return;
+        deleteLibraryItem(itemId);
+    }
+
+    async function deleteLibraryItem(itemId) {
+        if (!itemId) return;
+        document.body.style.cursor = 'wait';
+        try {
+            const resp = await fetch(`/delete_library_item/${itemId}`, {
+                method: 'POST',
+                headers: {
+                    'X-CSRFToken': '{{ csrf_token }}',
+                    'X-CSRF-Token': '{{ csrf_token }}'
+                },
+                credentials: 'same-origin'
+            });
+
+            const ct = resp.headers.get('Content-Type') || '';
+            if (ct.includes('application/json')) {
+                const j = await resp.json();
+                if (!resp.ok || j.ok === false) {
+                    alert(j.message || 'Fehler beim Löschen');
+                } else {
+                    alert(j.message || 'Gelöscht');
+                }
+                loadLibraryItems();
+            } else {
+                // Server redirected to HTML (flash messages). Reload to show state.
+                location.reload();
+            }
+        } catch (e) {
+            console.error('Delete failed', e);
+            alert('Fehler beim Löschen des Elements.');
+        } finally {
+            document.body.style.cursor = '';
+        }
+    }
+
     // Filter toggle
     document.getElementById('filterToggleBtn').addEventListener('click', () => {
         filterPanelOpen = !filterPanelOpen;
@@ -820,11 +864,27 @@
         setActiveStudentCard(cardId);
 
         const durationInput = (window.prompt('Ausleihdauer in Tagen (optional):') || '').trim();
+        const maxAvailable = Math.max(1, parseInt(selectedItem?.AvailableGroupedCount || selectedItem?.Quantity || 1, 10) || 1);
+        const countPrompt = (window.prompt(`Anzahl ausleihen? (Standard: 1, verfügbar: ${maxAvailable})`, '1') || '').trim();
+        let borrowCount = parseInt(countPrompt || '1', 10);
+        if (!Number.isFinite(borrowCount) || borrowCount < 1) {
+            borrowCount = 1;
+        }
+        if (borrowCount > maxAvailable) {
+            alert(`Es sind nur ${maxAvailable} Exemplar(e) verfügbar.`);
+            return;
+        }
 
         const form = document.createElement('form');
         form.method = 'POST';
         form.action = `/ausleihen/${itemId}`;
 
+        const csrfField = document.createElement('input');
+        csrfField.type = 'hidden';
+        csrfField.name = 'csrf_token';
+        csrfField.value = '{{ csrf_token }}';
+        form.appendChild(csrfField);
+
         const cardField = document.createElement('input');
         cardField.type = 'hidden';
         cardField.name = 'borrower_card_id';
@@ -845,6 +905,12 @@
             form.appendChild(durationField);
         }
 
+        const countField = document.createElement('input');
+        countField.type = 'hidden';
+        countField.name = 'exemplare_count';
+        countField.value = String(borrowCount || 1);
+        form.appendChild(countField);
+
         document.body.appendChild(form);
         form.submit();
     }

Web/templates/license.html

@@ -1,11 +1,3 @@
-<!--
-   Copyright 2025-2026 AIIrondev
-
-   Licensed under the Inventarsystem EULA (Endbenutzer-Lizenzvertrag).
-   See Legal/LICENSE for the full license text.
-   Unauthorized commercial use, SaaS hosting, or removal of branding is prohibited.
-   For commercial licensing inquiries: https://github.com/AIIrondev
--->
 {% extends "base.html" %}
 
 {% block title %}License - Inventarsystem{% endblock %}
@@ -17,10 +9,6 @@
 
         <!-- Tab navigation -->
         <ul class="nav nav-tabs mt-3" id="legalTabs" role="tablist">
-            <li class="nav-item" role="presentation">
-                <button class="nav-link active" id="tab-eula" data-bs-toggle="tab" data-bs-target="#pane-eula"
-                    type="button" role="tab">EULA</button>
-            </li>
             <li class="nav-item" role="presentation">
                 <button class="nav-link" id="tab-notice" data-bs-toggle="tab" data-bs-target="#pane-notice"
                     type="button" role="tab">NOTICE</button>
@@ -43,139 +31,12 @@
             </li>
         </ul>
 
-        <div class="tab-content" id="legalTabContent">
-
-        <!-- ── EULA ─────────────────────────────────────────────────────── -->
-        <div class="tab-pane fade show active" id="pane-eula" role="tabpanel">
-        <div class="license-content">
-
-            <!-- EULA -->
-            <h2>Endbenutzer-Lizenzvertrag (EULA) und Nutzungsbedingungen</h2>
-            <p><strong>Softwareprojekt:</strong> Inventarsystem<br>
-               <strong>Urheberrechtshalter (Lizenzgeber):</strong> AIIrondev<br>
-               <strong>Gültigkeit:</strong> Stand 2026</p>
-
-            <hr>
-
-            <h3>Präambel</h3>
-            <p>Dieser Endbenutzer-Lizenzvertrag (im Folgenden „Vertrag") stellt eine rechtsgültige Vereinbarung zwischen Ihnen
-            (im Folgenden „Lizenznehmer") und dem Urheber <strong>AIIrondev</strong> (im Folgenden „Lizenzgeber") dar.
-            Durch den Zugriff auf den Quellcode, die Installation, das Kopieren oder die sonstige Nutzung der Software
-            „Inventarsystem" (im Folgenden „Produkt") erklärt sich der Lizenznehmer mit den nachfolgenden Bedingungen
-            vollumfänglich einverstanden.</p>
-            <p>Sollte der Lizenznehmer den Bedingungen dieses Vertrags nicht zustimmen, ist jegliche Nutzung,
-            Vervielfältigung oder Distribution des Produkts mit sofortiger Wirkung untersagt.</p>
-
-            <hr>
-
-            <h3>§ 1 Gegenstand der Lizenz und Eigentumsrechte</h3>
-            <ol>
-                <li>Das Produkt wird dem Lizenznehmer unter Vorbehalt lizenziert, nicht verkauft. Sämtliche
-                    Eigentumsrechte, Urheberrechte und sonstigen geistigen Eigentumsrechte am Produkt sowie an allen
-                    Kopien davon verbleiben ausschließlich beim Lizenzgeber.</li>
-                <li>Diese Lizenz gewährt lediglich ein eingeschränktes Nutzungsrecht unter den in diesem Vertrag
-                    explizit genannten Bedingungen.</li>
-            </ol>
-
-            <h3>§ 2 Zulässiger Nutzungskreis (Privatnutzung)</h3>
-            <ol>
-                <li>Die unentgeltliche Nutzung des Produkts ist ausschließlich <strong>natürlichen Personen für den
-                    rein privaten, häuslichen Gebrauch</strong> gestattet.</li>
-                <li>Die Nutzung umfasst die Verwaltung privater Bestände ohne jegliche Gewinnerzielungsabsicht.</li>
-                <li>Jegliche Nutzung durch <strong>Institutionelle Nutzer</strong> (einschließlich, aber nicht
-                    beschränkt auf: Unternehmen, Einzelunternehmer, Freiberufler, Vereine, Bildungseinrichtungen,
-                    Behörden oder NGOs) ist ausdrücklich <strong>untersagt</strong> und bedarf einer gesonderten,
-                    schriftlichen Lizenzvereinbarung mit dem Lizenzgeber.</li>
-            </ol>
-
-            <h3>§ 3 Funktionale Einschränkungen und Support</h3>
-            <ol>
-                <li>Dem Lizenznehmer wird das Produkt in der jeweils vorliegenden Fassung bereitgestellt („As-Is").</li>
-                <li>Für die kostenlose Privatnutzung besteht <strong>kein Anspruch</strong> auf:
-                    <ul>
-                        <li>Technischen Support oder Beratung.</li>
-                        <li>Bereitstellung von Sicherheits-Updates oder Patches.</li>
-                        <li>Gewährleistung der Kompatibilität mit spezifischen Hardware- oder Softwareumgebungen.</li>
-                    </ul>
-                </li>
-                <li>Der Lizenzgeber behält sich das Recht vor, Funktionen in zukünftigen Versionen zu ändern,
-                    einzuschränken oder kostenpflichtig zu gestalten.</li>
-            </ol>
-
-            <h3>§ 4 Wahrung der Urheberbezeichnung (Branding-Klausel)</h3>
-            <ol>
-                <li>Das Produkt verfügt über fest integrierte Urheberrechtshinweise, insbesondere die Kennzeichnung
-                    <strong>„Powered by AIIrondev"</strong> in der Benutzeroberfläche (Footer/Menü).</li>
-                <li>Es ist dem Lizenznehmer untersagt, diese Hinweise zu entfernen, zu modifizieren, zu verdecken oder
-                    deren Sichtbarkeit durch technische Maßnahmen (z. B. Manipulation von CSS, JavaScript oder
-                    Metadaten) zu beeinträchtigen.</li>
-                <li>Das Entfernen dieser Hinweise führt zum sofortigen und automatischen Erlöschen der
-                    Nutzungslizenz.</li>
-            </ol>
-
-            <h3>§ 5 Verbot der kommerziellen Verwertung &amp; SaaS</h3>
-            <ol>
-                <li>Die Bereitstellung des Produkts als Dienstleistung für Dritte (Software-as-a-Service, SaaS),
-                    insbesondere gegen Entgelt oder zur Generierung von Werbeeinnahmen, ist strikt untersagt.</li>
-                <li>Das Hosting auf öffentlichen Servern mit dem Ziel, Dritten ohne eigene Installation Zugriff auf
-                    die Funktionalität zu gewähren, ist nur mit ausdrücklicher schriftlicher Genehmigung des
-                    Lizenzgebers zulässig.</li>
-            </ol>
-
-            <h3>§ 6 Modifikationen und Contributions</h3>
-            <ol>
-                <li>Der Lizenznehmer darf den Quellcode für den privaten Eigenbedarf modifizieren.</li>
-                <li>Im Falle einer Veröffentlichung von Modifikationen oder der Einreichung von
-                    Verbesserungsvorschlägen (z. B. Pull Requests auf GitHub) räumt der Lizenznehmer dem Lizenzgeber
-                    ein unwiderrufliches, weltweites, zeitlich unbeschränktes und kostenfreies Nutzungs- und
-                    Verwertungsrecht an diesen Änderungen ein. Der Lizenzgeber ist berechtigt, diese Änderungen in
-                    das Hauptprodukt zu übernehmen und unter dieser oder einer anderen Lizenz zu vertreiben.</li>
-            </ol>
-
-            <h3>§ 7 Haftungsbeschränkung</h3>
-            <ol>
-                <li>Die Haftung des Lizenzgebers für Schäden, die aus der Nutzung oder Unmöglichkeit der Nutzung des
-                    Produkts entstehen (einschließlich Datenverlust, Betriebsunterbrechung oder entgangener Gewinn),
-                    ist auf Vorsatz und grobe Fahrlässigkeit beschränkt.</li>
-                <li>Der Lizenzgeber übernimmt keine Haftung für die Richtigkeit der mit dem Produkt verwalteten
-                    Daten.</li>
-            </ol>
-
-            <h3>§ 8 Rechtswahl und Gerichtsstand</h3>
-            <ol>
-                <li>Es gilt ausschließlich das Recht der <strong>Bundesrepublik Deutschland</strong> unter Ausschluss
-                    des UN-Kaufrechts (CISG).</li>
-                <li>Soweit gesetzlich zulässig, wird als Gerichtsstand für alle Streitigkeiten aus diesem Vertrag der
-                    Sitz des Lizenzgebers vereinbart.</li>
-                <li>Sollten einzelne Bestimmungen dieses Vertrags unwirksam sein, bleibt die Wirksamkeit der übrigen
-                    Bestimmungen unberührt (Salvatorische Klausel).</li>
-            </ol>
-
-            <hr>
-
-            <div class="license-exception-notice">
-                <h3>⚠️ Anfragen für Ausnahmegenehmigungen (Kommerzielle Lizenzen)</h3>
-                <p>
-                    Bitte kontaktieren Sie den Urheber direkt über das GitHub-Profil:
-                    <a href="https://github.com/AIIrondev" target="_blank" rel="noopener noreferrer">AIIrondev auf GitHub</a>
-                </p>
-            </div>
-
-        </div><!-- /.license-content -->
-        </div><!-- /#pane-eula -->
-
         <!-- ── NOTICE ────────────────────────────────────────────────────── -->
         <div class="tab-pane fade" id="pane-notice" role="tabpanel">
         <div class="license-content">
             <h2>NOTICE – Urheberrechtliche Hinweise</h2>
-            <p><strong>Inventarsystem</strong><br>Copyright © 2025-2026 AIIrondev</p>
-            <p>Dieses Projekt steht unter dem Inventarsystem EULA (Endbenutzer-Lizenzvertrag). Der vollständige Lizenztext
-            befindet sich in <code>Legal/LICENSE</code>. Die Software wird ausschließlich für den privaten,
-            nicht-kommerziellen Gebrauch bereitgestellt. Unerlaubte kommerzielle Nutzung, SaaS-Hosting oder das Entfernen
-            von Branding ist untersagt. Anfragen für kommerzielle Lizenzen:
-            <a href="https://github.com/AIIrondev" target="_blank" rel="noopener noreferrer">https://github.com/AIIrondev</a></p>
+            <p><strong>Invario Modul Suite</strong><br>Copyright © 2026 Invario UG</p>
 
-            <hr>
             <h3>Drittanbieter-Hinweise</h3>
             <p>Dieses Projekt nutzt oder referenziert die folgende Drittanbieter-Software. Deren jeweilige Lizenzen gelten
             wie angegeben. Dieser NOTICE-Abschnitt dient ausschließlich der Attribution und ändert keine Lizenzbedingungen.</p>
@@ -200,13 +61,6 @@
             <ul>
                 <li>html5-qrcode (MIT) © 2020-2025 Manoj Brahmbhatt (mebjas)</li>
             </ul>
-
-            <h4>Systemkomponenten (nicht im Repository enthalten, ggf. im Deployment genutzt)</h4>
-            <ul>
-                <li>NGINX (2-clause BSD) © Nginx, Inc. and/or its licensors</li>
-                <li>FFmpeg (LGPL/GPL, je nach Konfiguration) © 2000-2025 FFmpeg developers</li>
-            </ul>
-
             <hr>
         </div>
         </div><!-- /#pane-notice -->
@@ -258,9 +112,6 @@
         <div class="license-content">
             <h2>Sicherheitsrichtlinie (Security Policy)</h2>
 
-            <h3>Unterstützte Versionen</h3>
-            <p>Bitte nutzen Sie immer die neueste Version aus dem <code>main</code>-Branch, um Sicherheitsupdates zu erhalten.</p>
-
             <h3>Datenschutzrechtliche Mechanismen</h3>
             <ul>
                 <li><strong>Passwort-Hashing:</strong> Passwörter werden niemals im Klartext gespeichert.</li>
@@ -272,10 +123,7 @@
             <h3>Meldung von Sicherheitslücken</h3>
             <div class="license-exception-notice">
                 <h3>⚠️ Responsible Disclosure</h3>
-                <p>Falls Sie eine Sicherheitslücke entdecken, öffnen Sie bitte <strong>kein öffentliches Issue</strong>.
-                Kontaktieren Sie den Maintainer direkt über die
-                <a href="https://github.com/AIIrondev" target="_blank" rel="noopener noreferrer">GitHub Security Advisory-Funktion</a>
-                oder per E-Mail.</p>
+                <p>Falls Sie eine Sicherheitslücke entdecken, wenden sie sich umgehend an die Email: info@invario.eu .
             </div>
         </div>
         </div><!-- /#pane-security -->

Web/templates/register.html

@@ -55,7 +55,7 @@
                 <div class="form-group">
                     <label for="password">Passwort</label>
                     <div class="password-rules" id="password-rules" aria-live="polite">
-                        <p class="password-rules-title">Passwort-Anforderungen (live):</p>
+                        <p class="password-rules-title">Passwort-Anforderungen:</p>
                         <ul>
                             <li id="pw-rule-length" class="pw-rule">Mindestens 12 Zeichen</li>
                             <li id="pw-rule-lower" class="pw-rule">Mindestens ein Kleinbuchstabe</li>

Web/templates/upload_admin.html

@@ -716,6 +716,8 @@
         <p style="margin:0 0 10px 0; color:#555;">Laden Sie eine <strong>.xlsx</strong>- oder <strong>.csv</strong>-Datei hoch. Spalten werden automatisch erkannt (z.B. Name, Ort, Beschreibung, ISBN, Code, Anzahl). Für den Bibliotheksimport ist eine gültige ISBN je Zeile erforderlich.</p>
         <form method="POST" action="{{ url_for('upload_library_excel') }}" enctype="multipart/form-data" style="display:flex; gap:10px; flex-wrap:wrap; align-items:center;">
             <input type="file" name="library_excel" accept=".xlsx,.csv" required>
+            <button type="button" class="btn btn-link" onclick="downloadSampleCsv('library')">Beispiel-CSV herunterladen</button>
+            <button type="button" class="btn btn-outline-secondary" title="Format-Hilfe" onclick="showCsvHelp('library')">?</button>
             <button type="submit" class="btn btn-secondary" name="excel_action" value="validate">Nur validieren</button>
             <button type="submit" class="btn btn-primary" name="excel_action" value="import">Bibliothek importieren</button>
         </form>
@@ -726,6 +728,8 @@
         <p style="margin:0 0 10px 0; color:#555;">Laden Sie eine <strong>.xlsx</strong>- oder <strong>.csv</strong>-Datei hoch. Spalten werden automatisch erkannt (z.B. Name, Ort, Beschreibung, Filter1/2/3, Kosten, Jahr, Code, Anzahl).</p>
         <form method="POST" action="{{ url_for('upload_inventory_excel') }}" enctype="multipart/form-data" style="display:flex; gap:10px; flex-wrap:wrap; align-items:center;">
             <input type="file" name="inventory_excel" accept=".xlsx,.csv" required>
+            <button type="button" class="btn btn-link" onclick="downloadSampleCsv('inventory')">Beispiel-CSV herunterladen</button>
+            <button type="button" class="btn btn-outline-secondary" title="Format-Hilfe" onclick="showCsvHelp('inventory')">?</button>
             <button type="submit" class="btn btn-secondary" name="excel_action" value="validate">Nur validieren</button>
             <button type="submit" class="btn btn-primary" name="excel_action" value="import">Inventar importieren</button>
         </form>
@@ -883,7 +887,7 @@
             <div class="form-group">
                 <label for="individual_codes">Einzelcodes (optional, je Zeile ein Code)</label>
                 <textarea id="individual_codes" name="individual_codes" rows="4" placeholder="z.B.\nABC-001\nABC-002"></textarea>
-                <small style="display:block; color:#666;">Bei Anzahl > 1 können hier individuelle Codes pro Item gesetzt werden. Scanner-Eingaben werden bei Mehrfachanzahl automatisch hier angefügt.</small>
+                <small style="display:block; color:#666;">Bei Anzahl > 1 können hier individuelle Codes pro Item gesetzt werden. Der Scanner setzt immer zuerst den Basis-Code im Feld oben; weitere Einzelcodes können hier bei Bedarf manuell ergänzt werden.</small>
             </div>
             <!-- Image upload (hidden for library mode) -->
             <div class="form-group" {% if show_library_features %}style="display:none;"{% endif %}>
@@ -904,7 +908,7 @@
                     <button type="button" class="fetch-isbn-button" onclick="fetchBookInfo('upload')">Bild 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. Das Buchcover wird automatisch heruntergeladen.</small>
+                <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>
             
@@ -920,6 +924,53 @@
     </div>
 </div>
 
+<!-- CSV Help Modal -->
+<div id="csv-help-modal" class="popup-overlay" style="display:none;">
+    <div class="duplicate-code-popup" style="max-width:760px;">
+        <button class="popup-close-x" onclick="hideCsvHelp()">×</button>
+        <div class="popup-content">
+            <h3>CSV Import Format</h3>
+            <p id="csv-help-text" style="text-align:left; color:var(--ui-text);"></p>
+            <div style="margin-top:12px; text-align:center;">
+                <button class="popup-close-button" onclick="hideCsvHelp()">Schließen</button>
+            </div>
+        </div>
+    </div>
+</div>
+
+<script>
+    function downloadSampleCsv(scope) {
+        let headers = ['name','ort','beschreibung','filter1','filter2','filter3','anschaffungsjahr','anschaffungskosten','code_4','anzahl','isbn','item_type'];
+        let exampleInventory = ['Projektor','Aula','HD-Projektor für Präsentationen','Medien','Technik','','2019','450.00','PRJ-001','1','','general'];
+        let exampleLibrary = ['Harry Potter und der Stein der Weisen','Bibliothek','Kinderbuch von J.K. Rowling','Belletristik','','','1997','12.99','HP-001','1','9783551354013','book'];
+        let row = exampleInventory;
+        if (scope === 'library') row = exampleLibrary;
+
+        const csvContent = [headers.join(','), row.map(v=> '"'+String(v).replace(/"/g,'""')+'"').join(',')].join('\n');
+        const blob = new Blob([csvContent], { type: 'text/csv;charset=utf-8;' });
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = scope === 'library' ? 'sample_library_import.csv' : 'sample_inventory_import.csv';
+        document.body.appendChild(a);
+        a.click();
+        document.body.removeChild(a);
+        URL.revokeObjectURL(url);
+    }
+
+    function showCsvHelp(scope) {
+        const invText = `Erlaubte Spalten (Reihenfolge beliebig): name, ort, beschreibung, filter1, filter2, filter3, anschaffungsjahr, anschaffungskosten, code_4, anzahl, isbn, item_type.\n\n` +
+            `Hinweise:\n- Trenne Felder per Komma. Textfelder sollten in Anführungszeichen stehen, wenn sie Kommas enthalten.\n- Für Bibliotheks-Import ist eine gültige ISBN pro Zeile erforderlich (ISBN-10 oder ISBN-13).\n- 'code_4' kann leer bleiben; das System erzeugt in diesem Fall Codes.\n- 'anzahl' legt die Anzahl physischer Exemplare für diese Zeile fest.`;
+        const libText = invText;
+        document.getElementById('csv-help-text').textContent = scope === 'library' ? libText : invText;
+        document.getElementById('csv-help-modal').style.display = 'flex';
+    }
+
+    function hideCsvHelp() {
+        document.getElementById('csv-help-modal').style.display = 'none';
+    }
+</script>
+
 <script src="https://unpkg.com/html5-qrcode@2.0.9/dist/html5-qrcode.min.js"></script>
 <script>
     const libraryModuleEnabled = {{ 'true' if library_module_enabled else 'false' }};
@@ -965,33 +1016,30 @@
         return '';
     }
 
-    function appendIndividualCode(scannedCode) {
-        const textarea = document.getElementById('individual_codes');
-        const itemCountInput = document.getElementById('item_count');
-        if (!textarea || !itemCountInput) return false;
+    function updateIsbnLiveValidation() {
+        const isbnField = document.getElementById('isbn');
+        const statusEl = document.getElementById('isbn-scan-status');
+        if (!isbnField || !statusEl) return;
 
-        const itemCount = Math.max(1, parseInt(itemCountInput.value || '1', 10));
-        if (itemCount <= 1) return false;
+        const rawValue = isbnField.value.trim();
+        isbnField.classList.remove('code-valid', 'code-invalid');
 
-        const existing = textarea.value
-            .split(/\r?\n/)
-            .map(line => line.trim())
-            .filter(Boolean);
-
-        if (existing.includes(scannedCode)) {
-            setCode4ScanStatus(`Code ${scannedCode} ist bereits eingetragen.`, true);
-            return true;
+        if (!rawValue) {
+            statusEl.textContent = 'Scannen oder manuell eingeben. Gültige ISBNs helfen beim Abruf von Buchdaten, andere Codes werden trotzdem akzeptiert.';
+            statusEl.style.color = '#666';
+            return;
         }
 
-        if (existing.length >= itemCount) {
-            setCode4ScanStatus('Es sind bereits genug Einzelcodes für die gewählte Anzahl eingetragen.', true);
-            return true;
+        if (normalizeIsbnClient(rawValue)) {
+            isbnField.classList.add('code-valid');
+            statusEl.textContent = 'Gültiges ISBN-Format erkannt. Der Wert kann gespeichert werden.';
+            statusEl.style.color = '#666';
+            return;
         }
 
-        existing.push(scannedCode);
-        textarea.value = existing.join('\n');
-        setCode4ScanStatus(`Code ${scannedCode} hinzugefügt (${existing.length}/${itemCount}).`);
-        return true;
+        isbnField.classList.add('code-invalid');
+        statusEl.textContent = 'Kein gültiges ISBN-10/13-Format erkannt. Der Wert wird trotzdem akzeptiert.';
+        statusEl.style.color = '#b00020';
     }
 
     function startCode4Scanner() {
@@ -1027,7 +1075,7 @@
             rememberLastUsedCamera: true
         });
         code4ScannerRunning = true;
-        setCode4ScanStatus('Scanner läuft. Mehrere Codes nacheinander möglich.');
+        setCode4ScanStatus('Scanner läuft. Der Scan wird im Basis-Codefeld übernommen.');
 
         code4ScannerInstance.render((decodedText) => {
             const scannedCode = String(decodedText || '').trim();
@@ -1040,12 +1088,9 @@
             code4LastScanned = scannedCode;
             code4LastScannedAt = now;
 
-            const usedForIndividual = appendIndividualCode(scannedCode);
-            if (!usedForIndividual) {
-                codeField.value = scannedCode;
-                validateCodeField(codeField);
-                setCode4ScanStatus(`Code_4 gesetzt: ${scannedCode}`);
-            }
+            codeField.value = scannedCode;
+            validateCodeField(codeField);
+            setCode4ScanStatus(`Code_4 gesetzt: ${scannedCode}`);
         }, () => {});
     }
 
@@ -1094,21 +1139,23 @@
             if (!scannedCode) return;
 
             const normalizedIsbn = normalizeIsbnClient(scannedCode);
-            if (!normalizedIsbn) {
-                setIsbnScanStatus('Kein gültiger ISBN-Barcode erkannt. Bitte erneut scannen.', true);
-                return;
+            isbnField.value = normalizedIsbn || scannedCode;
+            updateIsbnLiveValidation();
+            if (normalizedIsbn) {
+                setIsbnScanStatus(`ISBN gesetzt: ${normalizedIsbn}`);
+            } else {
+                setIsbnScanStatus('Kein gültiges ISBN-Format erkannt, der gescannte Wert bleibt aber im Feld.', true);
             }
 
-            isbnField.value = normalizedIsbn;
-            setIsbnScanStatus(`ISBN gesetzt: ${normalizedIsbn}`);
-
             isbnScannerInstance.clear().catch(() => {});
             scannerBox.style.display = 'none';
             scanButton.textContent = 'ISBN scannen';
             isbnScannerRunning = false;
 
-            // Automatically load book metadata after scan.
-            fetchBookInfo('upload');
+            if (normalizedIsbn) {
+                // Automatically load book metadata after a valid ISBN scan.
+                fetchBookInfo('upload');
+            }
         }, () => {});
     }
 
@@ -1231,7 +1278,7 @@
         const isbn = normalizeIsbnClient(isbnField.value);
         
         if (!isbn) {
-            alert('Bitte eine gültige ISBN-10 oder ISBN-13 eingeben.');
+            infoContainer.innerHTML = '<div class="error-message">Bitte geben Sie eine ISBN oder einen Barcode ein.</div>';
             return;
         }
         
@@ -1645,6 +1692,13 @@
         if (scanIsbnBtn) {
             scanIsbnBtn.addEventListener('click', startIsbnScanner);
         }
+
+        const isbnField = document.getElementById('isbn');
+        if (isbnField) {
+            isbnField.addEventListener('input', updateIsbnLiveValidation);
+            isbnField.addEventListener('blur', updateIsbnLiveValidation);
+            updateIsbnLiveValidation();
+        }
         
         // Setup add new location button
         const addLocationBtn = document.getElementById('add-new-location-btn');

Web/tenant.py

@@ -9,6 +9,8 @@ Each tenant can support up to 20+ users with isolated data and resource pools.
 
 from flask import request, g, session, has_request_context
 from functools import wraps
+import datetime
+import json
 import logging
 import os
 import re
@@ -18,10 +20,48 @@ from Web.modules.database.settings import MongoClient
 
 logger = logging.getLogger(__name__)
 
+_TENANT_REGISTRY_MTIME = None
+
+
+def _load_tenant_registry_from_config():
+    registry = {}
+    config_path = getattr(cfg, 'CONFIG_PATH', None)
+    if config_path and os.path.isfile(config_path):
+        try:
+            with open(config_path, 'r', encoding='utf-8') as handle:
+                config = json.load(handle)
+            tenants = config.get('tenants', {})
+            if isinstance(tenants, dict):
+                registry.update(tenants)
+        except Exception as exc:
+            logger.warning("Failed to load tenant registry from config: %s", exc)
+    elif isinstance(getattr(cfg, 'TENANT_CONFIGS', None), dict):
+        registry.update(cfg.TENANT_CONFIGS)
+    return registry
+
+
+def _refresh_tenant_registry():
+    global TENANT_REGISTRY, _TENANT_REGISTRY_MTIME
+    config_path = getattr(cfg, 'CONFIG_PATH', None)
+
+    current_mtime = None
+    if config_path and os.path.isfile(config_path):
+        try:
+            current_mtime = os.path.getmtime(config_path)
+        except OSError:
+            current_mtime = None
+
+    if current_mtime == _TENANT_REGISTRY_MTIME:
+        return TENANT_REGISTRY
+
+    TENANT_REGISTRY.clear()
+    TENANT_REGISTRY.update(_load_tenant_registry_from_config())
+    _TENANT_REGISTRY_MTIME = current_mtime
+    return TENANT_REGISTRY
+
+
 # Tenant registry: maps subdomain/tenant_id to database name
-TENANT_REGISTRY = {}
-if isinstance(getattr(cfg, 'TENANT_CONFIGS', None), dict):
-    TENANT_REGISTRY.update(cfg.TENANT_CONFIGS)
+TENANT_REGISTRY = _load_tenant_registry_from_config()
 
 
 def _get_nested_value(source, path, default=None):
@@ -139,6 +179,8 @@ def _is_ip_host(hostname):
 
 def get_tenant_config(tenant_id=None):
     """Return the registered config for a tenant, falling back to default."""
+    _refresh_tenant_registry()
+
     if tenant_id is None:
         ctx = get_tenant_context()
         tenant_id = ctx.tenant_id if ctx and ctx.tenant_id else 'default'
@@ -232,6 +274,183 @@ def is_tenant_module_enabled(module_name, tenant_id=None, default=False):
     return bool(default)
 
 
+def _parse_datetime_value(value):
+    if value is None or value == '':
+        return None
+    if isinstance(value, datetime.datetime):
+        parsed = value
+    else:
+        text = str(value).strip()
+        if not text:
+            return None
+        try:
+            parsed = datetime.datetime.fromisoformat(text.replace('Z', '+00:00'))
+        except ValueError:
+            return None
+
+    if parsed.tzinfo is not None:
+        parsed = parsed.astimezone(datetime.timezone.utc).replace(tzinfo=None)
+    return parsed
+
+
+def get_tenant_trial_config(tenant_id=None):
+    """Return the optional trial/demo lifecycle settings for a tenant."""
+    config = get_tenant_config(tenant_id)
+    trial_config = _get_nested_value(config, ['trial'], {})
+    if not isinstance(trial_config, dict):
+        trial_config = {}
+
+    demo_config = _get_nested_value(config, ['demo'], {})
+    if isinstance(demo_config, dict):
+        merged = dict(demo_config)
+        merged.update(trial_config)
+        trial_config = merged
+
+    return trial_config
+
+
+def get_tenant_trial_status(tenant_id=None, now=None):
+    """Compute the current trial status for a tenant.
+
+    The config may define either an absolute "expires_at" timestamp or a
+    relative lifetime via "started_at"/"created_at" plus one of
+    "expires_after_days", "ttl_days", or "days".
+    """
+    trial_config = get_tenant_trial_config(tenant_id)
+    now = now or datetime.datetime.now()
+
+    enabled = bool(trial_config.get('enabled') or trial_config.get('active'))
+    if not enabled:
+        return {
+            'enabled': False,
+            'expired': False,
+            'auto_delete': bool(trial_config.get('auto_delete', False)),
+            'started_at': None,
+            'expires_at': None,
+            'days_left': None,
+        }
+
+    started_at = _parse_datetime_value(
+        trial_config.get('started_at')
+        or trial_config.get('created_at')
+        or trial_config.get('activated_at')
+    )
+    expires_at = _parse_datetime_value(trial_config.get('expires_at'))
+
+    if expires_at is None:
+        duration_days = trial_config.get('expires_after_days')
+        if duration_days is None:
+            duration_days = trial_config.get('ttl_days')
+        if duration_days is None:
+            duration_days = trial_config.get('days')
+        try:
+            duration_days = int(duration_days) if duration_days is not None else None
+        except (TypeError, ValueError):
+            duration_days = None
+
+        if duration_days is not None:
+            base_time = started_at or now
+            expires_at = base_time + datetime.timedelta(days=max(0, duration_days))
+
+    expired = bool(expires_at and now >= expires_at)
+    days_left = None
+    if expires_at:
+        remaining = expires_at - now
+        days_left = max(0, int(remaining.total_seconds() // 86400))
+
+    return {
+        'enabled': True,
+        'expired': expired,
+        'auto_delete': bool(trial_config.get('auto_delete', False)),
+        'started_at': started_at,
+        'expires_at': expires_at,
+        'days_left': days_left,
+    }
+
+
+def _get_tenant_db_name_from_config(tenant_id):
+    config = get_tenant_config(tenant_id)
+    explicit_db = None
+    if isinstance(config, dict):
+        explicit_db = config.get('db') or config.get('db_name')
+
+    if explicit_db:
+        return _normalize_db_name(explicit_db)
+
+    sanitized = ''.join(c if c.isalnum() or c == '_' else '' for c in str(tenant_id).lower())
+    return f'inventar_{sanitized}' if sanitized else cfg.MONGODB_DB
+
+
+def delete_tenant(tenant_id, *, drop_database=True, remove_from_config=True):
+    """Delete a tenant's runtime data and optionally remove its config entry."""
+    tenant_id = str(tenant_id or '').strip()
+    if not tenant_id:
+        return False
+
+    db_name = _get_tenant_db_name_from_config(tenant_id)
+
+    if drop_database:
+        try:
+            client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+            try:
+                client.drop_database(db_name)
+            finally:
+                client.close()
+        except Exception as exc:
+            logger.warning("Failed to drop tenant database %s for %s: %s", db_name, tenant_id, exc)
+
+    if remove_from_config:
+        try:
+            config_path = getattr(cfg, 'CONFIG_PATH', None)
+            if config_path and os.path.isfile(config_path):
+                with open(config_path, 'r', encoding='utf-8') as handle:
+                    config = json.load(handle)
+
+                tenants = config.get('tenants', {})
+                if not isinstance(tenants, dict):
+                    tenants = {}
+
+                aliases = set(_tenant_db_aliases(tenant_id))
+                aliases.add(tenant_id)
+                lowered = tenant_id.lower()
+                if lowered.startswith('schule'):
+                    aliases.add('school' + lowered[len('schule'):])
+                elif lowered.startswith('school'):
+                    aliases.add('schule' + lowered[len('school'):])
+
+                removed_any = False
+                for alias in aliases:
+                    if alias in tenants:
+                        tenants.pop(alias, None)
+                        removed_any = True
+
+                if removed_any:
+                    config['tenants'] = tenants
+                    with open(config_path, 'w', encoding='utf-8') as handle:
+                        json.dump(config, handle, indent=4, ensure_ascii=False)
+
+            for alias in [tenant_id, *_tenant_db_aliases(tenant_id)]:
+                TENANT_REGISTRY.pop(alias, None)
+        except Exception as exc:
+            logger.warning("Failed to remove tenant config for %s: %s", tenant_id, exc)
+
+    return True
+
+
+def purge_expired_trial_tenants(now=None):
+    """Delete expired trial tenants that opted into auto-delete."""
+    now = now or datetime.datetime.now()
+    purged_tenants = []
+
+    for tenant_id in list(TENANT_REGISTRY.keys()):
+        status = get_tenant_trial_status(tenant_id, now=now)
+        if status.get('enabled') and status.get('expired') and status.get('auto_delete'):
+            if delete_tenant(tenant_id):
+                purged_tenants.append(tenant_id)
+
+    return purged_tenants
+
+
 class TenantContext:
     """
     Manages current tenant context for request lifecycle.

config.json

@@ -19,6 +19,17 @@
         "cert": "Web/certs/cert.pem",
         "key": "Web/certs/key.pem"
     },
+    "email": {
+        "enabled": false,
+        "smtp_host": "smtp.gmail.com",
+        "smtp_port": 587,
+        "use_tls": true,
+        "username": "",
+        "password": "",
+        "from_address": "",
+        "default_sender_name": "Invario Inventurprogramm",
+        "timeout_seconds": 30
+    },
     "images": {
         "thumbnail_size": [
             150,

docker-compose-multitenant.yml

@@ -95,6 +95,7 @@ services:
       INVENTAR_MONGODB_HOST: mongodb
       INVENTAR_MONGODB_PORT: "27017"
       INVENTAR_MONGODB_DB: inventar_default
+      INVENTAR_CONFIG_PATH: /app/config.json
       
       # Redis Configuration (for sessions and caching)
       INVENTAR_REDIS_HOST: redis

manage-tenant.sh

@@ -56,6 +56,7 @@ show_help() {
     echo ""
     echo "Commands:"
     echo "  add <tenant_id> [port]       Add a new tenant (initializes database)"
+    echo "  trial <tenant_id> [port] [days] Create a 7-day demo tenant that auto-deletes after expiry"
     echo "  remove <tenant_id>           Remove a tenant completely (deletes data!)"
     echo "  restart-tenant <id>          'Restart' a single tenant (clears cache/sessions)"
     echo "  restart-all                  Restart all application containers (zero-downtime reload)"
@@ -65,6 +66,7 @@ show_help() {
     echo ""
     echo "Examples:"
     echo "  ./manage-tenant.sh add school_a 10001"
+    echo "  ./manage-tenant.sh trial school_demo 10002 7"
     echo "  ./manage-tenant.sh remove test_tenant"
     echo "  ./manage-tenant.sh module school_a inventory=off library=on"
     echo "  ./manage-tenant.sh restart-all"
@@ -137,6 +139,176 @@ PY
     fi
 }
 
+write_trial_tenant_config() {
+    local tenant_id="$1"
+    local port="$2"
+    local trial_days="$3"
+
+    if python3 - <<'PY' "$CONFIG_FILE" "$tenant_id" "$port" "$trial_days"
+import json, sys, os, datetime
+
+path, tenant_id, port_str, trial_days_str = sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4]
+if not os.path.isfile(path):
+    print(f"Error: config file not found: {path}", file=sys.stderr)
+    sys.exit(1)
+
+with open(path, 'r', encoding='utf-8') as f:
+    cfg = json.load(f)
+
+tenants = cfg.get('tenants')
+if tenants is None or not isinstance(tenants, dict):
+    tenants = {}
+
+aliases = {tenant_id}
+normalized = tenant_id.lower()
+if normalized.startswith('schule'):
+    aliases.add('school' + normalized[len('schule'):])
+elif normalized.startswith('school'):
+    aliases.add('schule' + normalized[len('school'):])
+
+for tid, conf in tenants.items():
+    if port_str and isinstance(conf, dict) and str(conf.get('port')) == port_str and tid not in aliases:
+        print(f"Error: port {port_str} is already mapped to tenant {tid}", file=sys.stderr)
+        sys.exit(2)
+
+try:
+    trial_days = max(1, int(trial_days_str))
+except ValueError:
+    print(f"Error: trial days must be numeric, got {trial_days_str!r}", file=sys.stderr)
+    sys.exit(3)
+
+now = datetime.datetime.now(datetime.timezone.utc).isoformat()
+trial_config = {
+    'enabled': True,
+    'auto_delete': True,
+    'days': trial_days,
+    'ttl_days': trial_days,
+    'expires_after_days': trial_days,
+    'started_at': now,
+    'created_at': now,
+}
+
+existing = {}
+for alias in aliases:
+    alias_cfg = tenants.get(alias)
+    if isinstance(alias_cfg, dict):
+        existing = alias_cfg
+        break
+
+if port_str:
+    existing['port'] = int(port_str)
+existing['modules'] = {
+    'inventory': {'enabled': True},
+    'library': {'enabled': True},
+    'student_cards': {'enabled': True, 'default_borrow_days': 14, 'max_borrow_days': 365},
+}
+existing['trial'] = trial_config
+
+for alias in aliases:
+    tenants[alias] = dict(existing)
+
+cfg['tenants'] = tenants
+with open(path, 'w', encoding='utf-8') as f:
+    json.dump(cfg, f, indent=4, ensure_ascii=False)
+
+print(f"Configured trial tenant {tenant_id} with {trial_days} day(s) and auto-delete enabled")
+PY
+    then
+        echo "Trial tenant $tenant_id configured in config.json"
+    else
+        echo "Failed to configure trial tenant $tenant_id"
+        exit 1
+    fi
+}
+
+initialize_tenant_database() {
+    local tenant_id="$1"
+    local mode="$2"
+
+    APP_CONTAINER=$(docker ps -qf "name=app" | head -n 1)
+    if [ -z "$APP_CONTAINER" ]; then
+        echo "Warning: Application container is not running. Please start the multi-tenant system first."
+        echo "Data will be initialized upon first access by the tenant."
+        return 0
+    fi
+
+    docker exec "$APP_CONTAINER" python3 -c '
+import sys, re, datetime, hashlib
+sys.path.insert(0, "/app")
+sys.path.insert(0, "/app/Web")
+from Web.modules.database import settings
+from pymongo import MongoClient
+
+tenant_id = sys.argv[1].lower()
+mode = sys.argv[2]
+sanitized = "".join(c for c in tenant_id if c.isalnum() or c == "_")
+db_name = f"inventar_{sanitized}"
+client = MongoClient(settings.MONGODB_HOST, int(settings.MONGODB_PORT))
+db = client[db_name]
+hashed_pw = hashlib.sha512("admin123".encode()).hexdigest()
+
+action_permissions = {
+    "can_borrow": True,
+    "can_insert": True,
+    "can_edit": True,
+    "can_delete": True,
+    "can_manage_users": True,
+    "can_manage_settings": True,
+    "can_view_logs": True,
+}
+
+page_permissions = {
+    "home": True,
+    "tutorial_page": True,
+    "my_borrowed_items": True,
+    "notifications_view": True,
+    "impressum": True,
+    "license": True,
+    "library_view": True,
+    "terminplan": True,
+    "home_admin": True,
+    "upload_admin": True,
+    "library_admin": True,
+    "admin_borrowings": True,
+    "library_loans_admin": True,
+    "admin_damaged_items": True,
+    "admin_audit_dashboard": True,
+    "logs": True,
+    "manage_filters": True,
+    "manage_locations": True,
+}
+
+if db.users.count_documents({"Username": "admin"}) == 0:
+    db.users.insert_one({
+        "Username": "admin",
+        "Password": hashed_pw,
+        "Admin": True,
+        "active_ausleihung": None,
+        "name": "Admin",
+        "last_name": "User",
+        "IsStudent": False,
+        "PermissionPreset": "full_access",
+        "ActionPermissions": action_permissions,
+        "PagePermissions": page_permissions,
+    })
+
+if mode == "trial":
+    db.settings.update_one(
+        {"setting_type": "tenant_trial"},
+        {"$set": {
+            "setting_type": "tenant_trial",
+            "enabled": True,
+            "auto_delete": True,
+            "days": 7,
+            "created_at": datetime.datetime.now(datetime.timezone.utc).isoformat(),
+        }},
+        upsert=True,
+    )
+
+print(f"Tenant {sys.argv[1]} database initialized. Default admin: admin / admin123")
+' "$tenant_id" "$mode"
+}
+
 update_runtime_ports() {
     local new_port="$1"
     local env_file="$PWD/.docker-build.env"
@@ -471,6 +643,36 @@ print(f'Tenant {sys.argv[1]} database initialized. Default admin: admin / admin1
             echo "Data will be initialized upon first access by the tenant."
         fi
         ;;
+
+    trial)
+        if [ -z "$TENANT_ID" ]; then
+            echo "Error: Please provide a tenant_id."
+            exit 1
+        fi
+
+        PORT_ARG="${3:-}"
+        DAYS_ARG="${4:-7}"
+
+        if [ -n "$PORT_ARG" ]; then
+            if ! printf '%s\n' "$PORT_ARG" | grep -qE '^[0-9]+$'; then
+                echo "Error: Port must be a numeric value."
+                exit 1
+            fi
+            register_tenant_port "$TENANT_ID" "$PORT_ARG"
+            update_runtime_ports "$PORT_ARG"
+            sync_tenant_port_map
+        fi
+
+        write_trial_tenant_config "$TENANT_ID" "$PORT_ARG" "$DAYS_ARG"
+
+        if [ -n "$(docker ps -qf 'name=app' | head -n 1)" ]; then
+            restart_app_container
+        fi
+
+        echo "Initializing trial database for $TENANT_ID..."
+        initialize_tenant_database "$TENANT_ID" "trial"
+        echo "Trial tenant '$TENANT_ID' successfully configured. It will expire after $DAYS_ARG day(s) and self-delete."
+        ;;
     
     remove)
         if [ -z "$TENANT_ID" ]; then