Fix for the delete user function

Web/app.py

@@ -27,6 +27,10 @@ import os
 import sys
 from bs4 import BeautifulSoup
 from gridfs import GridFS
+import string
+from reportlab.lib.pagesizes import A4
+from reportlab.pdfgen import canvas
+from reportlab.lib import colors
 
 # Ensure imports work regardless of whether gunicorn starts in /app or /app/Web.
 _CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
@@ -3313,7 +3317,7 @@ def api_library_items():
         ausleihungen_db = db['ausleihungen']
 
         query = {
-            'ItemType': {'$in': ['book', 'cd', 'dvd', 'schoolbook', 'schulbuch', 'Buch', 'Schulbuch']},
+            'ItemType': {'$in': ['book', 'cd', 'CD', 'DVD', 'dvd', 'schoolbook', 'schulbuch', 'Buch', 'Schulbuch']},
             'IsGroupedSubItem': {'$ne': True},
             'Deleted': {'$ne': True}
         }
@@ -6366,13 +6370,22 @@ def edit_item(id):
 
     return redirect(url_for('home_admin'))
 
+def is_library_item(item):
+    """
+    Prüft, ob ein Artikel ein Bibliotheks-Item ist.
+    - 'other', None oder Leerstring -> Inventarsystem (False)
+    - Jeder andere Medientyp ('Buch', 'CD', etc.) -> Bibliothek (True)
+    """
+    if not item:
+        return False
+    item_type = item.get('ItemType', 'other')
+    if not item_type:
+        return False
+    return item_type.strip().lower() != 'other'
+
 
 @app.route('/item_edit/<id>', methods=['GET', 'POST'])
 def item_edit(id):
-    """
-    Endpoint zum Laden und Aktualisieren eines Eintrags (item_edit).
-    """
-    # 1. Rechte- & Auth-Check
     if 'username' not in session:
         if request.method == 'POST' and request.is_json:
             return jsonify({'success': False, 'message': 'Nicht angemeldet.'}), 401
@@ -6392,127 +6405,161 @@ def item_edit(id):
         flash('Ungültige Element-ID.', 'error')
         return redirect(url_for('home_admin'))
 
-
-    # --- GET: Template anzeigen ---
-    if request.method == 'GET':
-        item = it.get_item(id)
-        if not item:
-            flash('Element nicht gefunden.', 'error')
-            return redirect(url_for('home_admin'))
-
-        item['_id'] = str(item['_id'])
-        show_library = cfg.MODULES.is_enabled('library')
-
-        return render_template(
-            'item_edit.html',
-            username=session['username'],
-            item=item,
-            library_module_enabled=show_library,
-            show_library_features=show_library,
-            page_title=f"Bearbeiten: {item.get('Name', '')}"
-        )
-
-    # --- POST: Speichern ---
-    redirect_target = request.referrer or url_for('home_admin')
     current_item = it.get_item(obj_id)
-
     if not current_item:
         flash('Element in der Datenbank nicht gefunden.', 'error')
-        return redirect(redirect_target)
+        return redirect(url_for('home_admin'))
+
+    # Bibliothek-Status ermitteln
+    library_module_active = cfg.MODULES.is_enabled('library')
+    is_lib_item = it.is_library_item(current_item)
+    show_library_features = library_module_active and is_lib_item
+
+    # -------------------------------------------------------------------
+    # GET METHOD
+    # -------------------------------------------------------------------
+    if request.method == 'GET':
+        current_item['_id'] = str(current_item['_id'])
+
+        base_code = current_item.get('Code_4', '')
+        individual_codes = []
+        if current_item.get('SeriesGroupId'):
+            group_ids = it.get_group_item_ids(str(current_item['_id']))
+            if group_ids:
+                for gid in group_ids:
+                    g_item = it.get_item(gid)
+                    c4 = g_item.get('Code_4')
+                    if c4 and c4 != base_code:
+                        individual_codes.append(c4)
+
+        current_item['IndividualCodes'] = '\n'.join(individual_codes)
+
+        return render_template(
+            'edit_library.html',
+            username=session['username'],
+            item=current_item,
+            show_library_features=show_library_features,
+            library_module_enabled=library_module_active,
+            page_title=f"Bearbeiten: {current_item.get('Name', '')}"
+        )
+
+    # -------------------------------------------------------------------
+    # POST METHOD
+    # -------------------------------------------------------------------
+    redirect_target = request.referrer or url_for('home_admin')
 
-    # Formulardaten auslesen und bereinigen
     name = sanitize_form_value(request.form.get('name'))
     ort = sanitize_form_value(request.form.get('ort'))
     beschreibung = sanitize_form_value(request.form.get('beschreibung'))
-    code_4 = sanitize_form_value(request.form.get('code_4'))
-    isbn_raw = sanitize_form_value(request.form.get('isbn', ''))
-
     anschaffungs_jahr = sanitize_form_value(request.form.get('anschaffungsjahr'))
     anschaffungs_kosten = sanitize_form_value(request.form.get('anschaffungskosten'))
     reservierbar = 'reservierbar' in request.form
 
-    item_type_input = sanitize_form_value(request.form.get('item_type_input'))
-    library_category = sanitize_form_value(request.form.get('library_category'))
+    code_4 = sanitize_form_value(request.form.get('code_4'))
+    individual_codes_raw = request.form.get('individual_codes', '')
 
-    filter1 = expand_filter_selection(sanitize_form_value(request.form.getlist('filter')), 1)
-    filter2 = expand_filter_selection(sanitize_form_value(request.form.getlist('filter2')), 2)
-    filter3 = sanitize_form_value(request.form.getlist('filter3'))
+    individual_codes = []
+    for c in individual_codes_raw.replace('\r', '').split('\n'):
+        clean_c = sanitize_form_value(c)
+        if clean_c and clean_c != code_4 and clean_c not in individual_codes:
+            individual_codes.append(clean_c)
 
-    # WICHTIG: Den aktuellen Verfügbarkeitsstatus aus der Datenbank übernehmen
-    verfuegbar = current_item.get('Verfuegbar', True)
+    all_codes_to_check = [code_4] + individual_codes
 
-    # Barcode Prüfen
-    if code_4 and not it.is_code_unique(code_4, exclude_id=str(id)):
-        flash(f'Der Code "{code_4}" wird bereits verwendet.', 'error')
+    current_group_id = current_item.get('SeriesGroupId')
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    db_instance = client[cfg.MONGODB_DB]
+    items_col = db_instance['items']
+
+    has_code_error = False
+    for code in all_codes_to_check:
+        if not code:
+            continue
+        existing = items_col.find_one({'Code_4': code, 'Deleted': {'$ne': True}})
+        if existing:
+            is_same_item = str(existing['_id']) == str(id)
+            is_in_same_group = current_group_id and existing.get('SeriesGroupId') == current_group_id
+            if not is_same_item and not is_in_same_group:
+                flash(f'Der Code "{code}" wird bereits von einem anderen Artikel verwendet.', 'error')
+                has_code_error = True
+                break
+    client.close()
+
+    if has_code_error:
         return redirect(redirect_target)
 
-    # ISBN und Medientyp verarbeiten
-    item_isbn = ''
-    item_type = item_type_input or current_item.get('ItemType', 'general')
-    if cfg.MODULES.is_enabled('library') and isbn_raw:
-        item_isbn = normalize_and_validate_isbn(isbn_raw)
-        if not item_isbn:
-            flash('Ungültiges ISBN-Format.', 'error')
-            return redirect(redirect_target)
+    if show_library_features:
+        # LIBRARY ITEM: Process ISBN/Medientyp/Category, preserve existing filters
+        isbn_raw = sanitize_form_value(request.form.get('isbn', ''))
+        item_isbn = normalize_and_validate_isbn(isbn_raw) if isbn_raw else ''
+        item_type = sanitize_form_value(request.form.get('item_type_input', current_item.get('ItemType', 'Buch')))
+        library_category = sanitize_form_value(request.form.get('library_category', ''))
+        images = current_item.get('Images', [])
 
-    # Bilder verarbeiten (GridFS)
-    images_to_keep = request.form.getlist('existing_images')
-    original_images = current_item.get('Images', [])
-    images = [img for img in original_images if img in images_to_keep]
+        filter1 = current_item.get('Filter', [])
+        filter2 = current_item.get('Filter2', [])
+        filter3 = current_item.get('Filter3', [])
+    else:
+        # NON-LIBRARY (INVENTORY) ITEM: Process Filter 1-3 from form
+        item_isbn = current_item.get('ISBN', '')
+        item_type = 'other'
+        library_category = current_item.get('library_category', '')
 
-    new_files = request.files.getlist('images')
-    if new_files and new_files[0].filename != '':
-        fs = get_gridfs()
-        for file in new_files:
-            if file and file.filename:
-                is_allowed, error_msg = allowed_file(file.filename, file)
-                if not is_allowed:
-                    flash(error_msg, 'error')
-                    return redirect(redirect_target)
+        filter1 = expand_filter_selection(sanitize_form_value(request.form.getlist('filter')), 1)
+        filter2 = expand_filter_selection(sanitize_form_value(request.form.getlist('filter2')), 2)
+        filter3 = sanitize_form_value(request.form.getlist('filter3'))
 
-                try:
-                    secure_name = secure_filename(file.filename)
-                    file.seek(0)
-                    image_bytes = file.read()
-
-                    if not image_bytes:
-                        continue
-
-                    optimized_io = io.BytesIO()
-                    with Image.open(io.BytesIO(image_bytes)) as img:
-                        if img.mode not in ('RGB', 'RGBA'):
-                            img = img.convert('RGBA')
-
-                        max_width = 800
-                        if img.width > max_width:
-                            ratio = max_width / img.width
-                            img = img.resize((max_width, int(img.height * ratio)), Image.Resampling.LANCZOS)
-
-                        img.save(optimized_io, format='WEBP', quality=85, optimize=True)
-
-                    optimized_io.seek(0)
-                    new_filename = f"{uuid.uuid4().hex}_{int(time.time())}.webp"
-
-                    fs.put(
-                        optimized_io,
-                        filename=new_filename,
-                        content_type='image/webp',
-                        metadata={'original_filename': secure_name, 'item_id': str(id)}
-                    )
-                    images.append(new_filename)
-                except Exception as e:
-                    app.logger.error(f"Bild-Fehler bei Item {id}: {e}")
+        images_to_keep = request.form.getlist('existing_images')
+        original_images = current_item.get('Images', [])
+        images = [img for img in original_images if img in images_to_keep]
 
+        new_files = request.files.getlist('images')
+        if new_files and new_files[0].filename != '':
+            fs = get_gridfs()
+            for file in new_files:
+                if file and file.filename:
+                    is_allowed, error_msg = allowed_file(file.filename, file)
+                    if not is_allowed:
+                        flash(error_msg, 'error')
+                        return redirect(redirect_target)
+                    try:
+                        secure_name = secure_filename(file.filename)
+                        file.seek(0)
+                        image_bytes = file.read()
+                        if not image_bytes:
+                            continue
+                        optimized_io = io.BytesIO()
+                        with Image.open(io.BytesIO(image_bytes)) as img:
+                            if img.mode not in ('RGB', 'RGBA'):
+                                img = img.convert('RGBA')
+                            max_width = 800
+                            if img.width > max_width:
+                                ratio = max_width / img.width
+                                img = img.resize((max_width, int(img.height * ratio)), Image.Resampling.LANCZOS)
+                            img.save(optimized_io, format='WEBP', quality=85, optimize=True)
+                        optimized_io.seek(0)
+                        new_filename = f"{uuid.uuid4().hex}_{int(time.time())}.webp"
+                        fs.put(
+                            optimized_io,
+                            filename=new_filename,
+                            content_type='image/webp',
+                            metadata={'original_filename': secure_name, 'item_id': str(id)}
+                        )
+                        images.append(new_filename)
+                    except Exception as e:
+                        app.logger.error(f"Image error for item {id}: {e}")
     if ort and ort not in it.get_predefined_locations():
         it.add_predefined_location(ort)
 
+    it.sync_group_codes(str(id), code_4, individual_codes)
+
     success = it.update_item(
         id=str(id),
         name=name,
         ort=ort,
         beschreibung=beschreibung,
         images=images,
-        verfuegbar=verfuegbar,
+        verfuegbar=current_item.get('Verfuegbar', True),
         filter1=filter1,
         filter2=filter2,
         filter3=filter3,
@@ -6521,7 +6568,8 @@ def item_edit(id):
         code_4=code_4,
         reservierbar=reservierbar,
         isbn=item_isbn,
-        item_type=item_type
+        item_type=item_type,
+        library_category=library_category
     )
 
     if success:
@@ -7817,35 +7865,282 @@ def register():
         permission_page_options=PERMISSION_PAGE_OPTIONS
     )
 
+def parse_csv_users(file_bytes):
+    """
+    Liest CSV-Dateien extrem robust ein:
+    - Erkennt automatisch UTF-8, UTF-8-SIG und Latin-1 (für Excel-Umlaute).
+    - Erkennt automatisch das Trennzeichen (; oder , oder Tab).
+    - Erkennt Vor- und Nachname unabhängig von der Spaltenreihenfolge und Headernamen.
+    """
+    # 1. Dekodierung mit Fallback für deutsche Excel-Dateien
+    try:
+        content = file_bytes.decode('utf-8-sig')
+    except UnicodeDecodeError:
+        content = file_bytes.decode('latin-1')
+
+    lines = [line.strip() for line in content.splitlines() if line.strip()]
+    if not lines:
+        return []
+
+    # 2. Trennzeichen ermitteln (; , oder \t)
+    first_line = lines[0]
+    if first_line.count(';') >= first_line.count(','):
+        delimiter = ';'
+    elif first_line.count('\t') > first_line.count(','):
+        delimiter = '\t'
+    else:
+        delimiter = ','
+
+    stream = io.StringIO(content, newline=None)
+    reader = csv.DictReader(stream, delimiter=delimiter)
+
+    parsed_users = []
+
+    # 3. Auswertung mit DictReader (wenn Header vorhanden sind)
+    if reader.fieldnames:
+        for row in reader:
+            # Keys normalisieren (kleingeschrieben, ohne Leerzeichen)
+            cleaned_row = {str(k).strip().lower(): str(v).strip() for k, v in row.items() if k and v}
+
+            # Dynamisches Mapping für Vornamen
+            name = (
+                cleaned_row.get('vorname') or
+                cleaned_row.get('first_name') or
+                cleaned_row.get('firstname') or
+                cleaned_row.get('name') or ''
+            )
+
+            # Dynamisches Mapping für Nachnamen
+            last_name = (
+                cleaned_row.get('nachname') or
+                cleaned_row.get('last_name') or
+                cleaned_row.get('lastname') or
+                cleaned_row.get('surname') or
+                cleaned_row.get('familienname') or ''
+            )
+
+            # Falls Header nicht erkannt wurden, aber Werte vorhanden sind (z.B. CSV ohne Header)
+            if not name and not last_name:
+                vals = [str(v).strip() for v in row.values() if v]
+                if len(vals) >= 2:
+                    name, last_name = vals[0], vals[1]
+
+            if name or last_name:
+                parsed_users.append({'name': name, 'last_name': last_name})
+    else:
+        # Fallback für dateien ohne Header
+        stream.seek(0)
+        raw_reader = csv.reader(stream, delimiter=delimiter)
+        for row in raw_reader:
+            clean_row = [str(cell).strip() for cell in row if str(cell).strip()]
+            if len(clean_row) >= 2:
+                # Header-Zeilen überspringen
+                if clean_row[0].lower() in ['vorname', 'first_name', 'name'] and clean_row[1].lower() in ['nachname', 'last_name']:
+                    continue
+                parsed_users.append({'name': clean_row[0], 'last_name': clean_row[1]})
+
+    return parsed_users
+
+def generate_compliant_password(length=16):
+    lowers = string.ascii_lowercase
+    uppers = string.ascii_uppercase
+    digits = string.digits
+    symbols = "!@#$%^&*()_+~|}{[]:;?><,.-="
+
+    # Ensure at least one character from each required category
+    pwd = [
+        secrets.choice(lowers),
+        secrets.choice(uppers),
+        secrets.choice(digits),
+        secrets.choice(symbols)
+    ]
+    all_chars = lowers + uppers + digits + symbols
+    pwd += [secrets.choice(all_chars) for _ in range(length - 4)]
+
+    # Shuffle so guaranteed types aren't always at the start
+    secrets.SystemRandom().shuffle(pwd)
+    return "".join(pwd)
+
+def generate_credentials_pdf(created_users):
+    """
+    Creates a PDF in memory with 2 user credential cards per A4 page.
+    created_users: list of dicts [{'name': ..., 'last_name': ..., 'username': ..., 'password': ...}]
+    """
+    buffer = io.BytesIO()
+    pdf = canvas.Canvas(buffer, pagesize=A4)
+    width, height = A4  # 595.27 x 841.89 points
+    card_height = height / 2.0  # Split page into 2 equal halves
+
+    for i, user in enumerate(created_users):
+        page_slot = i % 2  # 0 = Top half, 1 = Bottom half
+
+        # If starting a new page (except for the very first item)
+        if i > 0 and page_slot == 0:
+            pdf.showPage()
+
+        # Calculate Y offset for card position
+        y_offset = height - (page_slot + 1) * card_height
+
+        # Card Container Box
+        margin = 35
+        box_x = margin
+        box_y = y_offset + margin
+        box_w = width - (2 * margin)
+        box_h = card_height - (2 * margin)
+
+        # Outer Border
+        pdf.setStrokeColor(colors.HexColor('#CBD5E1'))
+        pdf.setLineWidth(1)
+        pdf.rect(box_x, box_y, box_w, box_h, fill=0)
+
+        # Header Banner inside Card
+        pdf.setFillColor(colors.HexColor('#1E293B'))
+        pdf.rect(box_x, box_y + box_h - 45, box_w, 45, fill=1, stroke=0)
+
+        # Header Title Text
+        pdf.setFillColor(colors.white)
+        pdf.setFont("Helvetica-Bold", 14)
+        pdf.drawString(box_x + 20, box_y + box_h - 28, "Zugangsdaten / Account Credentials")
+
+        # User Info Details
+        content_y = box_y + box_h - 80
+
+        # Name
+        pdf.setFillColor(colors.HexColor('#0F172A'))
+        pdf.setFont("Helvetica-Bold", 12)
+        pdf.drawString(box_x + 25, content_y, f"Name: {user['name']} {user['last_name']}")
+
+        # Username
+        content_y -= 35
+        pdf.setFont("Helvetica", 11)
+        pdf.setFillColor(colors.HexColor('#475569'))
+        pdf.drawString(box_x + 25, content_y, "Benutzername:")
+        pdf.setFont("Helvetica-Bold", 13)
+        pdf.setFillColor(colors.HexColor('#0F172A'))
+        pdf.drawString(box_x + 160, content_y, user['username'])
+
+        # Password
+        content_y -= 30
+        pdf.setFont("Helvetica", 11)
+        pdf.setFillColor(colors.HexColor('#475569'))
+        pdf.drawString(box_x + 25, content_y, "Passwort:")
+        pdf.setFont("Courier-Bold", 13)
+        pdf.setFillColor(colors.HexColor('#0F172A'))
+        pdf.drawString(box_x + 160, content_y, user['password'])
+
+        # Security Footer Note
+        content_y -= 45
+        pdf.setFont("Helvetica-Oblique", 9)
+        pdf.setFillColor(colors.HexColor('#64748B'))
+        pdf.drawString(box_x + 25, content_y, "Hinweis: Bitte ändern Sie Ihr Passwort nach der ersten Anmeldung.")
+
+        # Dashed Cut Line between top and bottom cards
+        if page_slot == 0 and i < len(created_users) - 1:
+            pdf.setDash(4, 4)
+            pdf.setStrokeColor(colors.HexColor('#94A3B8'))
+            pdf.line(0, card_height, width, card_height)
+            pdf.setDash()  # Reset dash
+
+    pdf.save()
+    buffer.seek(0)
+    return buffer
+
+
+@app.route('/register/csv', methods=['POST'])
+def register_csv():
+    if 'username' not in session:
+        flash('Ihnen ist es nicht gestattet, diese Aktion auszuführen.', 'error')
+        return redirect(url_for('login'))
+
+    file = request.files.get('csv_file')
+    if not file or not file.filename.endswith('.csv'):
+        flash('Bitte laden Sie eine gültige CSV-Datei hoch.', 'error')
+        return redirect(url_for('register'))
+
+    permission_preset = (request.form.get('permission_preset') or 'standard_user').strip()
+
+    # 1. CSV über die robuste Funktion einlesen
+    file_bytes = file.stream.read()
+    raw_users = parse_csv_users(file_bytes)
+
+    if not raw_users:
+        flash('Keine gültigen Benutzer in der CSV-Datei gefunden. Bitte prüfen Sie das Format.', 'error')
+        return redirect(url_for('register'))
+
+    created_users = []
+
+    for entry in raw_users:
+        name = entry['name']
+        last_name = entry['last_name']
+
+        if not name or not last_name:
+            continue
+
+        # Benutzernamen & Passwort generieren
+        username = us.build_unique_username_from_name(name, last_name)
+        password = generate_compliant_password(16)
+
+        # In DB speichern
+        success = us.add_user(
+            username=username,
+            password=password,
+            name=name,
+            last_name=last_name,
+            is_student=False,
+            student_card_id=None,
+            max_borrow_days=None,
+            permission_preset=permission_preset,
+        )
+
+        if success:
+            created_users.append({
+                'name': name,
+                'last_name': last_name,
+                'username': username,
+                'password': password
+            })
+
+    if not created_users:
+        flash('Fehler beim Erstellen der Benutzer aus der CSV.', 'error')
+        return redirect(url_for('register'))
+
+    # PDF mit Zugangsdaten generieren
+    pdf_buffer = generate_credentials_pdf(created_users)
+
+    return send_file(
+        pdf_buffer,
+        as_attachment=True,
+        download_name='benutzer_zugangsdaten.pdf',
+        mimetype='application/pdf'
+    )
+
+
 @app.route('/user_del', methods=['GET'])
 def user_del():
     """
     User deletion interface.
     Displays a list of users that can be deleted by an administrator.
     Prevents self-deletion by hiding the current user from the list.
-    
-    Returns:
-        flask.Response: Rendered template with user list or redirect
     """
     if 'username' not in session:
-        flash('Ihnen ist es nicht gestattet auf dieser Internetanwendung, die eben besuchte Adrrese zu nutzen, versuchen sie es erneut nach dem sie sich mit einem berechtigten Nutzer angemeldet haben!', 'error')
+        flash(
+            'Ihnen ist es nicht gestattet auf dieser Internetanwendung, die eben besuchte Adresse zu nutzen. Bitte melden Sie sich an!',
+            'error')
         return redirect(url_for('login'))
-    
+
+    # Abruf aller User (falls get_all_users tenant_id unterstützt, kann diese hier übergeben werden)
     all_users = us.get_all_users()
 
     users_list = []
     for user in all_users:
-        username = None
-        for field in ['Username']:
-            if field in user:
-                username = user[field]
-                break
-                
-        if username and username != session['username']:
+        username = user.get('Username')
+
+        if username and username != session.get('username'):
             try:
                 permissions_payload = us.get_effective_permissions(username)
             except Exception:
                 permissions_payload = us.build_default_permission_payload('standard_user')
+
             try:
                 name = us.get_name(username)
                 last_name = us.get_last_name(username)
@@ -7857,12 +8152,13 @@ def user_del():
                     fullname = last_name
                 else:
                     fullname = None
-            except:
+            except Exception:
                 name = ""
                 last_name = ""
                 fullname = None
+
             users_list.append({
-                'username': decrypt_text(username),
+                'username': username,  # Username ist plain in DB, kein decrypt_text() notwendig
                 'admin': user.get('Admin', False),
                 'fullname': fullname,
                 'name': name,
@@ -7871,7 +8167,7 @@ def user_del():
                 'action_permissions': permissions_payload.get('actions', {}),
                 'page_permissions': permissions_payload.get('pages', {}),
             })
-    
+
     return render_template(
         'user_del.html',
         users=users_list,
@@ -7884,68 +8180,72 @@ def user_del():
 def delete_user():
     """
     Process user deletion request.
-    Deletes a specified user from the system.
+    Deletes a specified user from the system directly via the tenant db.
     Includes safety checks to prevent self-deletion.
-    
-    Returns:
-        flask.Response: Redirect to the user deletion interface with status
     """
     if 'username' not in session:
-        flash('Ihnen ist es nicht gestattet auf dieser Internetanwendung, die eben besuchte Adrrese zu nutzen, versuchen sie es erneut nach dem sie sich mit einem berechtigten Nutzer angemeldet haben!', 'error')
+        flash('Ihnen ist es nicht gestattet, diese Aktion auszuführen. Bitte melden Sie sich an!', 'error')
         return redirect(url_for('login'))
-    
+
     username = request.form.get('username')
     if not username:
         flash('Kein Benutzer ausgewählt', 'error')
         return redirect(url_for('user_del'))
-    
-    # Prevent self-deletion
-    if username == session['username']:
+
+    if username == session.get('username'):
         flash('Sie können Ihr eigenes Konto nicht löschen', 'error')
         return redirect(url_for('user_del'))
-    
-    # Reset this user's borrowings and free items before deleting the user
+
     try:
-        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
-        db = client[MONGODB_DB]
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        tenant_id = session.get('tenant_id')
+        db = _get_tenant_db(client, tenant_id)
+
         ausleihungen = db['ausleihungen']
         items_col = db['items']
+        users_col = db['users']  # Direkter Zugriff auf die User-Collection
+
         now = datetime.datetime.now()
 
-        # Complete all active borrowings of this user
+        # 1. Aktive Ausleihen abschließen
         ausleihungen.update_many(
             {'User': username, 'Status': 'active'},
             {'$set': {'Status': 'completed', 'End': now, 'LastUpdated': now}}
         )
 
-        # Cancel all planned borrowings of this user
+        # 2. Geplante Ausleihen stornieren
         ausleihungen.update_many(
             {'User': username, 'Status': 'planned'},
             {'$set': {'Status': 'cancelled', 'LastUpdated': now}}
         )
 
-        # Free all items currently associated with this user
+        # 3. Inventar wieder verfügbar machen
         items_col.update_many(
             {'User': username},
             {'$set': {'Verfuegbar': True, 'LastUpdated': now}, '$unset': {'User': ""}}
         )
 
-        client.close()
-    except Exception as e:
-        app.logger.error(f"Error resetting borrowings for user {encrypt_text(username)}: {e}")
-        flash(f'Warnung: Ausleihungen/Reservierungen für {username} konnten nicht vollständig zurückgesetzt werden', 'warning')
+        # 4. Den Benutzer direkt in der überprüften DB-Verbindung löschen
+        # Achte auf die exakte Großschreibung 'Username' (so wie in add_user definiert)
+        delete_result = users_col.delete_one({'Username': username})
+
+        # 5. Explizite Erfolgskontrolle
+        if delete_result.deleted_count > 0:
+            flash(f'Benutzer {username} erfolgreich gelöscht', 'success')
+        else:
+            # Fallback, falls der Nutzer nicht gefunden wurde (Fehlervermeidung)
+            flash(f'Löschen fehlgeschlagen: Benutzer {username} wurde in der Datenbank nicht gefunden.', 'error')
 
-    # Delete the user
-    try:
-        us.delete_user(username)
-        flash(f'Benutzer {username} erfolgreich gelöscht', 'success')
     except Exception as e:
-        app.logger.error(f"Error deleting user {encrypt_text(username)}: {e}")
-        flash('Fehler beim Löschen des Benutzers', 'error')
+        app.logger.error(f"Error resetting borrowings or deleting user {username}: {e}")
+        flash('Kritischer Fehler beim Löschen des Benutzers', 'error')
+    finally:
+        # Garantiert, dass die DB-Verbindung geschlossen wird
+        if 'client' in locals():
+            client.close()
 
     return redirect(url_for('user_del'))
 
-
 @app.route('/admin/borrowings')
 def admin_borrowings():
     """

Web/modules/database/items.py

@@ -20,12 +20,30 @@ Collection Structure:
 """
 from bson.objectid import ObjectId
 from bson.errors import InvalidId
+import uuid
 import datetime
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 import Web.modules.inventarsystem.data_protection as dp
 
 
+def is_library_item(item):
+    """
+    Ermittelt zuverlässig, ob ein Objekt zur Bibliothek gehört.
+    Gibt True zurück, wenn ItemType ein Medientyp ist (Buch, Schulbuch, CD, DVD etc.)
+    ODER wenn is_library explizit True ist.
+    """
+    if not item:
+        return False
+
+    # 1. Prüfe zuerst den Medientyp (ItemType)
+    item_type = str(item.get('ItemType', '') or '').strip().lower()
+    if item_type and item_type not in ['other', 'general', 'none', 'null']:
+        return True
+
+    # 2. Falls ItemType 'other' ist, prüfe das is_library Flag
+    return bool(item.get('is_library', False))
+
 def safe_decrypt_user(encrypted_user):
     """
     Safely decrypt an encrypted username string.
@@ -250,7 +268,10 @@ def get_group_item_ids(id):
 
 
 def update_item(id, name, ort, beschreibung, images, verfuegbar, filter1, filter2, filter3,
-                ansch_jahr, ansch_kost, code_4, reservierbar, isbn=None, item_type='general'):
+                ansch_jahr, ansch_kost, code_4, reservierbar, isbn="", item_type='other', library_category=""):
+    """
+    Aktualisiert ein Objekt in MongoDB und setzt is_library korrekt basierend auf dem Medientyp.
+    """
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
@@ -258,29 +279,35 @@ def update_item(id, name, ort, beschreibung, images, verfuegbar, filter1, filter
 
         old_item = items.find_one({'_id': ObjectId(id)})
         if not old_item:
+            client.close()
             return False
 
         series_group_id = old_item.get('SeriesGroupId')
 
+        # is_library automatisch anhand des neuen item_type bestimmen
+        is_lib = is_library_item({'ItemType': item_type})
+
         shared_update = {
             'Name': name,
             'Ort': ort,
             'Beschreibung': beschreibung,
-            'Images': images,
-            'Filter': filter1,
-            'Filter2': filter2,
-            'Filter3': filter3,
+            'Images': images if isinstance(images, list) else [],
+            'Filter': filter1 if isinstance(filter1, list) else [],
+            'Filter2': filter2 if isinstance(filter2, list) else [],
+            'Filter3': filter3 if isinstance(filter3, list) else [],
             'Anschaffungsjahr': ansch_jahr,
             'Anschaffungskosten': ansch_kost,
-            'Reservierbar': reservierbar,
-            'ISBN': isbn,
+            'Reservierbar': bool(reservierbar),
+            'ISBN': str(isbn) if isbn else '',
             'ItemType': item_type,
-            'Verfuegbar': verfuegbar,
+            'is_library': is_lib,
+            'library_category': library_category,
+            'Verfuegbar': bool(verfuegbar),
             'LastUpdated': datetime.datetime.now()
         }
 
         specific_update = shared_update.copy()
-        specific_update['Code_4'] = code_4
+        specific_update['Code_4'] = str(code_4) if code_4 else ''
 
         items.update_one({'_id': ObjectId(id)}, {'$set': specific_update})
 
@@ -1147,4 +1174,122 @@ def get_current_status(item_id, decrypt=True):
         return None
     except Exception as e:
         print(f"Error retrieving current status for item {item_id}: {e}")
-        return None
+        return None
+
+def sync_group_codes(primary_obj_id, base_code, individual_codes_list):
+    """
+    Synchronisiert die Barcodes einer Gruppe im korrekten Schema
+    (angelehnt an das 'Augenmodell groß'-Vorbild).
+    """
+    if not base_code:
+        return False
+
+    # Alle Ziel-Codes zusammenführen (Basis-Code an erster Stelle)
+    all_target_codes = [base_code]
+    for c in individual_codes_list:
+        if c and c not in all_target_codes:
+            all_target_codes.append(c)
+
+    item_count = len(all_target_codes)
+
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = client[cfg.MONGODB_DB]
+        items = db['items']
+
+        primary_item = items.find_one({'_id': ObjectId(primary_obj_id)})
+        if not primary_item:
+            client.close()
+            return False
+
+        group_id = primary_item.get('SeriesGroupId')
+
+        # Wenn es mehr als 1 Item gibt und noch keine Gruppe existiert -> Neue GroupID erzeugen
+        if not group_id and item_count > 1:
+            group_id = str(uuid.uuid4())
+
+        # Wenn es nun eine Gruppe gibt (item_count > 1)
+        if item_count > 1:
+            # 1. Haupt-Item (Parent) aktualisieren
+            items.update_one(
+                {'_id': primary_item['_id']},
+                {'$set': {
+                    'Code_4': base_code,
+                    'SeriesGroupId': group_id,
+                    'SeriesCount': item_count,
+                    'SeriesPosition': 1,
+                    'IsGroupedSubItem': False,
+                    'ParentItemId': None
+                }}
+            )
+
+            # Bestehende Gruppenmitglieder laden
+            existing_items = list(items.find({'SeriesGroupId': group_id}))
+            existing_map = {it.get('Code_4'): it for it in existing_items if
+                            it.get('Code_4') and str(it['_id']) != str(primary_item['_id'])}
+
+            # Alle verbleibenden Sub-Codes ab Position 2 abarbeiten
+            processed_sub_ids = []
+            for idx, code in enumerate(all_target_codes[1:], start=2):
+                if code in existing_map:
+                    # Existiert bereits in der Gruppe -> Nur Position und Count aktualisieren
+                    sub_item = existing_map[code]
+                    processed_sub_ids.append(sub_item['_id'])
+                    items.update_one(
+                        {'_id': sub_item['_id']},
+                        {'$set': {
+                            'SeriesCount': item_count,
+                            'SeriesPosition': idx,
+                            'IsGroupedSubItem': True,
+                            'ParentItemId': str(primary_item['_id'])
+                        }}
+                    )
+                else:
+                    # Neu hinzukommender Code -> Als Klon (Sub-Item) erstellen
+                    new_sub = primary_item.copy()
+                    if '_id' in new_sub:
+                        del new_sub['_id']
+
+                    new_sub.update({
+                        'Code_4': code,
+                        'SeriesGroupId': group_id,
+                        'SeriesCount': item_count,
+                        'SeriesPosition': idx,
+                        'IsGroupedSubItem': True,
+                        'ParentItemId': str(primary_item['_id']),
+                        'LastUpdated': primary_item.get('LastUpdated')
+                    })
+                    inserted_res = items.insert_one(new_sub)
+                    processed_sub_ids.append(inserted_res.inserted_id)
+
+            # Nicht mehr benötigte Sub-Items aus dieser Gruppe entfernen
+            for code, sub_item in existing_map.items():
+                if sub_item['_id'] not in processed_sub_ids:
+                    items.delete_one({'_id': sub_item['_id']})
+
+        else:
+            # Fall: Nur 1 einziges Item (keine Gruppe / Gruppe aufgelöst)
+            # Eventuelle alte Sub-Items dieser Gruppe löschen
+            if group_id:
+                items.delete_many({
+                    'SeriesGroupId': group_id,
+                    '_id': {'$ne': primary_item['_id']}
+                })
+
+            items.update_one(
+                {'_id': primary_item['_id']},
+                {'$set': {
+                    'Code_4': base_code,
+                    'SeriesGroupId': None,
+                    'SeriesCount': 1,
+                    'SeriesPosition': 1,
+                    'IsGroupedSubItem': False,
+                    'ParentItemId': None
+                }}
+            )
+
+        client.close()
+        return True
+    except Exception as e:
+        print(f"Error syncing group codes: {e}")
+        return False

Web/templates/edit_inventar.html

@@ -48,7 +48,6 @@
         console.log("Server-provided duplicate data:", serverDuplicateData);
     }
 </script>
-{% endif %}
 
 <style>
     /* Book information display styles */
@@ -764,17 +763,24 @@
                 <textarea id="beschreibung" name="beschreibung" rows="4" class="form-control" required>{{ item.Beschreibung if item.Beschreibung else '' }}</textarea>
             </div>
 
-            <!-- Barcode / Code_4 -->
+            <!-- Barcode / Basis-Code -->
             <div class="form-group" id="primary_code_group">
-                <label for="code_4">Barcode / Artikel-Code:</label>
+                <label for="code_4">Basis-Code (Haupt-Barcode)</label>
                 <div style="display: flex; gap: 10px;">
                     <input type="text" id="code_4" name="code_4" class="form-control" value="{{ item.Code_4 if item.Code_4 else '' }}" required>
-                    <button type="button" id="scan-code4-btn" class="btn btn-primary">Barcode scannen</button>
+                    <button type="button" id="scan-code4-btn" class="btn btn-primary" style="white-space: nowrap;">Barcode scannen</button>
                 </div>
                 <div id="code4-scanner" style="display:none; margin-top: 10px;"></div>
                 <small id="code4-scan-status" class="form-text text-muted"></small>
             </div>
 
+            <!-- Weitere Einzelcodes -->
+            <div class="form-group" id="individual_codes_group">
+                <label for="individual_codes">Weitere Einzelcodes (je Zeile ein Code)</label>
+                <textarea id="individual_codes" name="individual_codes" rows="4" class="form-control">{{ item.IndividualCodes if item.IndividualCodes else '' }}</textarea>
+                <small style="display:block; color:#666; margin-top: 5px;">Der Scanner füllt zuerst den Basis-Code; weitere gescannte Codes werden hier automatisch zeilenweise angehängt.</small>
+            </div>
+
             {% if show_library_features %}
             <!-- Bibliotheks-Klassifizierung -->
             <div class="filter-inputs">
@@ -918,8 +924,10 @@
     function startCode4Scanner() {
         const scannerBox = document.getElementById('code4-scanner');
         const scanButton = document.getElementById('scan-code4-btn');
-        const codeField = document.getElementById('code_4');
-        if (!scannerBox || !scanButton || !codeField) return;
+        const baseCodeField = document.getElementById('code_4');
+        const individualCodesField = document.getElementById('individual_codes');
+
+        if (!scannerBox || !scanButton || !baseCodeField) return;
 
         if (scannerBox.style.display !== 'none') {
             killScannerHardware(); scannerBox.style.display = 'none'; scanButton.textContent = 'Barcode scannen'; return;
@@ -932,11 +940,25 @@
             code4LastScanned = decodedText; code4LastScannedAt = now;
 
             killScannerHardware(); scannerBox.style.display = 'none'; scanButton.textContent = 'Barcode scannen';
-            codeField.value = decodedText;
-            validateCodeField(codeField, getItemId());
+
+            // Intelligentes Eintragen: Entweder Basis-Code oder Textarea
+            if (!baseCodeField.value.trim()) {
+                baseCodeField.value = decodedText;
+            } else {
+                let currentCodes = individualCodesField.value.split('\n').map(c => c.trim()).filter(c => c);
+                if (!currentCodes.includes(decodedText) && baseCodeField.value.trim() !== decodedText) {
+                    currentCodes.push(decodedText);
+                    individualCodesField.value = currentCodes.join('\n');
+                }
+            }
         }, 'Scanner läuft...', (msg) => { document.getElementById('code4-scan-status').textContent = msg; });
     }
 
+    document.addEventListener('DOMContentLoaded', function() {
+        const scanCodeBtn = document.getElementById('scan-code4-btn');
+        if (scanCodeBtn) scanCodeBtn.addEventListener('click', startCode4Scanner);
+    });
+
     function validateCodeField(input, excludeId) {
         const code = input.value.trim();
         if (!code) return;
@@ -1002,4 +1024,6 @@
         const codeField = document.getElementById('code_4');
         if (codeField) codeField.addEventListener('blur', function() { validateCodeField(this, getItemId()); });
     });
-</script>
+</script>
+
+{% endblock %}

Web/templates/edit_item_functions.html

@@ -1,288 +0,0 @@
-<!--
-   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
--->
-<!-- Edit Item Functions -->
-<script>
-    // Function to check if a file is a video
-    function isVideoFile(filename) {
-        const videoExtensions = ['.mp4', '.mov', '.avi', '.mkv', '.webm', '.flv', '.m4v', '.3gp'];
-        const extension = filename.toLowerCase().substring(filename.lastIndexOf('.'));
-        return videoExtensions.includes(extension);
-    }
-
-    // Load location options for edit modal
-    function loadLocationOptions() {
-        fetch('/get_predefined_locations')
-            .then(response => response.json())
-            .then(data => {
-                const ortSelect = document.getElementById('edit-location');
-                if (ortSelect) {
-                    // Clear existing options except the first one
-                    while (ortSelect.children.length > 1) {
-                        ortSelect.removeChild(ortSelect.lastChild);
-                    }
-                    
-                    // Add new options - data.locations contains the array
-                    data.locations.forEach(location => {
-                        const option = document.createElement('option');
-                        option.value = location;
-                        option.textContent = location;
-                        ortSelect.appendChild(option);
-                    });
-                }
-            })
-            .catch(error => {
-                console.error('Error loading location options:', error);
-            });
-    }
-
-    // Edit modal functions
-    function openEditModal(itemId) {
-        if (typeof openEditModalFromServer === 'function') {
-            openEditModalFromServer(itemId);
-            return;
-        }
-
-        // Find the item data from allItems array
-        const item = allItems.find(i => i._id === itemId);
-        if (!item) {
-            console.error('Item not found:', itemId);
-            return;
-        }
-
-        // Populate the edit form with current item data
-        document.getElementById('edit-item-id').value = item._id;
-        document.getElementById('edit-name').value = item.Name || '';
-        document.getElementById('edit-description').value = item.Beschreibung || '';
-        document.getElementById('edit-code4').value = item.Code_4 || '';
-        document.getElementById('edit-year').value = item.Anschaffungsjahr || '';
-        document.getElementById('edit-cost').value = item.Anschaffungskosten || '';
-
-        // Set reservable status (default to true if undefined)
-        const reservierbarCheckbox = document.getElementById('edit-reservierbar');
-        if (reservierbarCheckbox) {
-            reservierbarCheckbox.checked = item.Reservierbar !== false;
-        }
-
-        // Load location options
-        loadLocationOptions();
-
-        // Set the current location
-        setTimeout(() => {
-            const locationSelect = document.getElementById('edit-location');
-            if (locationSelect && item.Ort) {
-                locationSelect.value = item.Ort;
-            }
-        }, 100);
-
-        // Handle filter arrays - set current values
-        const filter1Array = Array.isArray(item.Filter) ? item.Filter : (item.Filter ? [item.Filter] : []);
-        const filter2Array = Array.isArray(item.Filter2) ? item.Filter2 : (item.Filter2 ? [item.Filter2] : []);
-        const filter3Array = Array.isArray(item.Filter3) ? item.Filter3 : (item.Filter3 ? [item.Filter3] : []);
-
-        // Set filter dropdowns (up to 4 each)
-        for (let i = 1; i <= 4; i++) {
-            // Filter 1
-            const filter1Select = document.getElementById(`edit-filter1-${i}`);
-            if (filter1Select) {
-                filter1Select.value = filter1Array[i-1] || '';
-            }
-            
-            // Filter 2
-            const filter2Select = document.getElementById(`edit-filter2-${i}`);
-            if (filter2Select) {
-                filter2Select.value = filter2Array[i-1] || '';
-            }
-            
-            // Filter 3
-            const filter3Select = document.getElementById(`edit-filter3-${i}`);
-            if (filter3Select) {
-                filter3Select.value = filter3Array[i-1] || '';
-            }
-        }
-
-        // Populate existing images
-        populateExistingImages(item.Images || []);
-
-        // Show the modal
-        document.getElementById('edit-modal').style.display = 'block';
-    }
-
-    function closeEditModal() {
-        document.getElementById('edit-modal').style.display = 'none';
-    }
-    
-    // Function to add new location (for edit modal)
-    function addNewLocation(prefix) {
-        // Use different input IDs based on whether we're in edit mode
-        const inputId = prefix === 'edit' ? 'edit-new-location-input' : 'new-location-input';
-        const selectId = prefix === 'edit' ? 'edit-location' : 'ort';
-        
-        const newLocationInput = document.getElementById(inputId);
-        const newLocation = newLocationInput.value.trim();
-        
-        if (!newLocation) {
-            alert('Bitte geben Sie einen Ort ein.');
-            return;
-        }
-        
-        // Add to dropdown
-        const ortSelect = document.getElementById(selectId);
-        const option = document.createElement('option');
-        option.value = newLocation;
-        option.textContent = newLocation;
-        ortSelect.appendChild(option);
-        ortSelect.value = newLocation;
-        
-        // Hide the input field
-        document.getElementById(prefix + '-new-location-container').style.display = 'none';
-        newLocationInput.value = '';
-        
-        // Save to server
-        fetch('/add_location_value', {
-            method: 'POST',
-            headers: {
-                'Content-Type': 'application/x-www-form-urlencoded',
-            },
-            body: 'value=' + encodeURIComponent(newLocation)
-        })
-        .then(response => response.json())
-        .then(data => {
-            if (!data.success) {
-                console.warn('Failed to save location to server:', data.error);
-            }
-        })
-        .catch(error => {
-            console.error('Error saving location:', error);
-        });
-    }
-    
-    // Function to cancel adding a new location
-    function cancelAddLocation(prefix) {
-        const containerId = prefix === 'edit' ? 'edit-new-location-container' : 'new-location-container';
-        const inputId = prefix === 'edit' ? 'edit-new-location-input' : 'new-location-input';
-        document.getElementById(containerId).style.display = 'none';
-        document.getElementById(inputId).value = '';
-    }
-
-    // Function to populate existing images in edit modal
-    function populateExistingImages(images) {
-        const previewContainer = document.getElementById('edit-image-preview-container');
-        if (!previewContainer) return;
-        
-        previewContainer.innerHTML = '';
-        
-        if (!images || images.length === 0) {
-            previewContainer.innerHTML = '<p>Keine Bilder vorhanden</p>';
-            return;
-        }
-        
-        images.forEach((imageName, index) => {
-            const preview = document.createElement('div');
-            preview.className = 'image-preview-item';
-            
-            const isVideo = isVideoFile(imageName);
-            const mediaHtml = isVideo 
-                ? `<video src="/uploads/${imageName}" style="max-width: 150px; max-height: 150px; object-fit: cover;" controls preload="metadata"></video>`
-                : `<img src="/uploads/${imageName}" alt="Image ${index + 1}" style="max-width: 150px; max-height: 150px; object-fit: cover;">`;
-            
-            preview.innerHTML = `
-                ${mediaHtml}
-                <div class="image-controls">
-                    <button type="button" onclick="removeExistingImage('${imageName}', this)" style="background: #dc3545; color: white; border: none; padding: 5px 10px; border-radius: 3px; cursor: pointer; margin-left: 10px;">Entfernen</button>
-                </div>
-            `;
-            previewContainer.appendChild(preview);
-            
-            // Add hidden input for the image
-            const hiddenInput = document.createElement('input');
-            hiddenInput.type = 'hidden';
-            hiddenInput.name = 'existing_images';
-            hiddenInput.value = imageName;
-            previewContainer.appendChild(hiddenInput);
-        });
-    }
-    
-    // Function to remove an existing image
-    function removeExistingImage(imageName, button) {
-        try {
-            // First, determine context - are we in edit mode or main view?
-            const inEditMode = !!document.getElementById('edit-item-form');
-            
-            // Always remove the preview element (works in both contexts)
-            const previewItem = button.closest('.image-preview-item');
-            if (previewItem) {
-                previewItem.remove();
-            }
-            
-            // If we're in edit mode, handle form inputs
-            if (inEditMode) {
-                // Find and remove the corresponding hidden input in the edit form
-                const editForm = document.getElementById('edit-item-form');
-                
-                if (editForm) {
-                    // Remove from existing images
-                    const existingInputs = editForm.querySelectorAll('input[name="existing_images"]');
-                    existingInputs.forEach(input => {
-                        if (input.value === imageName) {
-                            input.remove();
-                        }
-                    });
-                    
-                    // Add to removed images
-                    const removedInput = document.createElement('input');
-                    removedInput.type = 'hidden';
-                    removedInput.name = 'removed_images';
-                    removedInput.value = imageName;
-                    editForm.appendChild(removedInput);
-                }
-            } else {
-                // In main view, we may need different logic
-                console.log(`Image ${imageName} removed from display in main view`);
-                // Add any main view specific handling here
-            }
-        } catch (error) {
-            console.error(`Error in removeExistingImage: ${error.message}`);
-        }
-    }
-    
-    // Validate file types for image uploads
-    document.addEventListener('DOMContentLoaded', function() {
-        // Check if we're in the edit item context
-        if (!document.getElementById('edit-item-form')) {
-            console.log('Edit item form not found, skipping edit item functions initialization');
-            return; // Exit early if we're not in the edit item context
-        }
-        
-        const imageInput = document.getElementById('edit-new-images');
-        const previewContainer = document.getElementById('edit-image-preview-container');
-        
-        if (imageInput) {
-            imageInput.addEventListener('change', function(e) {
-                // Validate file types before preview
-                const allowedTypes = ['image/jpeg', 'image/jpg', 'image/png', 'image/gif',
-                                    'video/mp4', 'video/quicktime', 'video/x-msvideo', 'video/x-matroska',
-                                    'video/webm', 'video/x-flv', 'video/mp4', 'video/3gpp'];
-                const files = this.files;
-                let hasInvalidFile = false;
-                
-                for (let i = 0; i < files.length; i++) {
-                    if (!allowedTypes.includes(files[i].type)) {
-                        hasInvalidFile = true;
-                        // Clear the file input to prevent submission
-                        this.value = '';
-                        alert('Fehler: Datei "' + files[i].name + '" hat ein nicht unterstütztes Format. Erlaubte Formate: JPG, JPEG, PNG, GIF, MP4, MOV, AVI, MKV, WEBM, FLV, M4V, 3GP');
-                        return; // Stop processing
-                    }
-                }
-                
-                // Continue with regular preview handling...
-            });
-        }
-    });
-</script>

Web/templates/edit_library.html

@@ -0,0 +1,509 @@
+<!--
+   Copyright 2025-2026 AIIrondev
+   Licensed under the Inventarsystem EULA.
+-->
+{% extends "base.html" %}
+
+{% block title %}{{ page_title|default('Artikel bearbeiten') }} - Inventarsystem{% endblock %}
+
+{% block content %}
+<style>
+    .edit-container {
+        max-width: 800px;
+        margin: 0 auto;
+        padding: 20px;
+        background-color: var(--ui-surface);
+        border-radius: 8px;
+        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
+    }
+
+    .edit-form h1 {
+        color: var(--ui-text);
+        margin-bottom: 30px;
+        text-align: center;
+        font-size: 2em;
+    }
+
+    .form-group {
+        margin-bottom: 20px;
+    }
+
+    .form-group label {
+        display: block;
+        margin-bottom: 5px;
+        font-weight: bold;
+        color: var(--ui-text);
+    }
+
+    .form-group input,
+    .form-group select,
+    .form-group textarea {
+        width: 100%;
+        padding: 10px;
+        border: 1px solid #ddd;
+        border-radius: 4px;
+        font-size: 16px;
+        box-sizing: border-box;
+    }
+
+    .form-group textarea {
+        height: 100px;
+        resize: vertical;
+    }
+
+    .filter-inputs {
+        background-color: var(--ui-surface-soft);
+        padding: 20px;
+        border-radius: 5px;
+        margin: 20px 0;
+    }
+
+    .filter-inputs h3 {
+        color: var(--ui-text);
+        margin-bottom: 15px;
+        font-size: 1.2em;
+    }
+
+    .multi-filter {
+        display: grid;
+        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+        gap: 15px;
+    }
+
+    .filter-dropdown-select {
+        width: 100%;
+        padding: 8px;
+        border: 1px solid #ddd;
+        border-radius: 4px;
+        background-color: white;
+    }
+
+    .isbn-input-group {
+        display: flex;
+        gap: 10px;
+        align-items: center;
+    }
+
+    .isbn-input-group input {
+        flex: 1;
+    }
+
+    .fetch-isbn-button {
+        background-color: #007bff;
+        color: white;
+        border: none;
+        padding: 8px 12px;
+        border-radius: 4px;
+        cursor: pointer;
+        white-space: nowrap;
+        transition: background-color 0.2s ease;
+    }
+
+    .fetch-isbn-button:hover {
+        background-color: #0056b3;
+    }
+
+    /* Scanner Elements */
+    #code4-scanner video, #code4-scanner canvas,
+    #isbn-scanner video, #isbn-scanner canvas {
+        width: 100%;
+        max-width: 640px;
+        height: auto;
+        border-radius: 5px;
+        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
+    }
+
+    #code4-scanner canvas, #isbn-scanner canvas {
+        position: absolute;
+        top: 0;
+        left: 0;
+    }
+
+    #code4-scanner, #isbn-scanner {
+        position: relative;
+        overflow: hidden;
+    }
+
+    /* Image Management */
+    .existing-images-grid {
+        display: flex;
+        flex-wrap: wrap;
+        gap: 15px;
+        margin-top: 10px;
+    }
+
+    .existing-image-card {
+        border: 1px solid #ddd;
+        border-radius: 5px;
+        padding: 8px;
+        text-align: center;
+        background: #fff;
+        width: 120px;
+    }
+
+    .existing-image-card img {
+        width: 100%;
+        height: 100px;
+        object-fit: cover;
+        border-radius: 4px;
+    }
+
+    .existing-image-card label {
+        font-size: 0.8em;
+        margin-top: 5px;
+        cursor: pointer;
+        font-weight: normal;
+    }
+
+    .add-new-btn {
+        background-color: #007bff;
+        color: white;
+        border: none;
+        padding: 5px 10px;
+        border-radius: 3px;
+        cursor: pointer;
+        margin-top: 5px;
+        font-size: 12px;
+    }
+
+    .submit-button {
+        background-color: #28a745;
+        color: white;
+        border: none;
+        padding: 15px 30px;
+        border-radius: 5px;
+        font-size: 18px;
+        font-weight: bold;
+        cursor: pointer;
+        width: 100%;
+        margin-top: 20px;
+        transition: background-color 0.2s ease;
+    }
+
+    .submit-button:hover {
+        background-color: #218838;
+    }
+
+    .edit-new-location-container {
+        display: none;
+        margin-top: 10px;
+    }
+</style>
+
+<div class="edit-container">
+    <div class="edit-form">
+        <h1>{{ page_title|default('Artikel bearbeiten') }}</h1>
+        <form method="POST" action="{{ url_for('item_edit', id=item._id) }}" enctype="multipart/form-data">
+            <input type="hidden" name="item_id" value="{{ item._id }}">
+
+            {% if show_library_features %}
+            <!-- ================= LIBRARY SPECIFIC FIELDS ================= -->
+            <div class="form-group">
+                <label for="isbn">ISBN / Barcode:</label>
+                <div class="isbn-input-group">
+                    <input type="text" id="isbn" name="isbn" value="{{ item.ISBN|default('') }}" placeholder="ISBN oder Barcode eingeben...">
+                    <button type="button" id="scan-isbn-btn" class="fetch-isbn-button">Barcode scannen</button>
+                    <button type="button" class="fetch-isbn-button" onclick="fetchBookInfo('edit')">Informationen abrufen</button>
+                </div>
+                <div id="isbn-scanner" style="width:100%; max-width:520px; display:none; margin-top:10px;"></div>
+                <small id="isbn-scan-status" style="display:block; color:#666; margin-top:6px;"></small>
+                <div id="book-info-container"></div>
+            </div>
+
+            <div class="filter-inputs" style="margin-bottom: 20px;">
+                <h3>Medientyp</h3>
+                <div class="form-group">
+                    <select name="item_type_input" id="item_type_input">
+                        <option value="Buch" {% if item.ItemType == 'Buch' %}selected{% endif %}>Buch</option>
+                        <option value="Schulbuch" {% if item.ItemType == 'Schulbuch' %}selected{% endif %}>Schulbuch</option>
+                        <option value="CD" {% if item.ItemType == 'CD' %}selected{% endif %}>CD</option>
+                        <option value="DVD" {% if item.ItemType == 'DVD' %}selected{% endif %}>DVD</option>
+                        <option value="Sonstiges" {% if item.ItemType == 'Sonstiges' %}selected{% endif %}>Sonstiges</option>
+                    </select>
+                </div>
+                <h3>Bibliotheks-Kategorie:</h3>
+                <div class="form-group">
+                    <input type="text" name="library_category" id="library_category" value="{{ item.library_category|default('') }}" placeholder="z.B. Belletristik, Sachbücher, etc.">
+                </div>
+            </div>
+            {% endif %}
+
+            <!-- ================= COMMON CORE FIELDS ================= -->
+            <div class="form-group">
+                <label for="name">Name / Titel:</label>
+                <input type="text" id="name" name="name" value="{{ item.Name|default('') }}" required>
+            </div>
+
+            <div class="form-group">
+                <label for="ort">Ort / Standort:</label>
+                <select id="ort" name="ort" data-selected="{{ item.Ort|default('') }}" required>
+                    <option value="">-- Bitte Ort auswählen --</option>
+                    {% if item.Ort %}
+                    <option value="{{ item.Ort }}" selected>{{ item.Ort }}</option>
+                    {% endif %}
+                </select>
+                <button type="button" class="add-new-btn" id="add-new-location-btn">Neuen Ort hinzufügen</button>
+                <div id="new-location-container" class="edit-new-location-container">
+                    <input type="text" id="new-location-input" placeholder="Neuen Ort eingeben">
+                    <button type="button" onclick="addNewLocation()">Hinzufügen</button>
+                    <button type="button" onclick="cancelAddLocation()">Abbrechen</button>
+                </div>
+            </div>
+
+            <div class="form-group">
+                <label for="beschreibung">Beschreibung:</label>
+                <textarea id="beschreibung" name="beschreibung" required>{{ item.Beschreibung|default('') }}</textarea>
+            </div>
+
+            <div class="form-group" id="primary_code_group">
+                <label for="code_4">Basis-Code (Haupt-Barcode)</label>
+                <div style="display: flex; gap: 10px;">
+                    <input type="text" id="code_4" name="code_4" class="form-control" value="{{ item.Code_4|default('') }}" required>
+                    <button type="button" id="scan-code4-btn" class="fetch-isbn-button">Barcode scannen</button>
+                </div>
+                <div id="code4-scanner" style="display:none; margin-top: 10px;"></div>
+                <small id="code4-scan-status" class="form-text text-muted"></small>
+            </div>
+
+            <div class="form-group" id="individual_codes_group">
+                <label for="individual_codes">Weitere Einzelcodes der Gruppe (je Zeile ein Code)</label>
+                <textarea id="individual_codes" name="individual_codes" rows="4" class="form-control" placeholder="z.B.&#10;ABC-001&#10;ABC-002">{{ item.IndividualCodes|default('') }}</textarea>
+                <small style="display:block; color:#666; margin-top: 5px;">Der Basis-Code steht oben. Alle weiteren Gruppenmitglieder werden hier untereinander aufgeführt.</small>
+            </div>
+
+            {% if not show_library_features %}
+            <!-- ================= SYSTEM FILTERS 1-3 (INVENTORY / OTHER ITEMS ONLY) ================= -->
+            <div class="filter-inputs">
+                <h3>Unterrichtsfach (Filter 1):</h3>
+                <div class="multi-filter">
+                    {% for idx in range(4) %}
+                    <div class="form-group">
+                        <label for="filter1-{{ idx + 1 }}">Wert {{ idx + 1 }}:</label>
+                        <select id="filter1-{{ idx + 1 }}" name="filter" class="filter-dropdown-select" data-selected="{{ item.Filter[idx] if item.Filter and item.Filter|length > idx else '' }}">
+                            <option value="">-- Optional --</option>
+                        </select>
+                    </div>
+                    {% endfor %}
+                </div>
+
+                <h3>Jahrgangsstufe (Filter 2):</h3>
+                <div class="multi-filter">
+                    {% for idx in range(4) %}
+                    <div class="form-group">
+                        <label for="filter2-{{ idx + 1 }}">Wert {{ idx + 1 }}:</label>
+                        <select id="filter2-{{ idx + 1 }}" name="filter2" class="filter-dropdown-select" data-selected="{{ item.Filter2[idx] if item.Filter2 and item.Filter2|length > idx else '' }}">
+                            <option value="">-- Optional --</option>
+                        </select>
+                    </div>
+                    {% endfor %}
+                </div>
+
+                <h3>Schlagwort (Filter 3):</h3>
+                <div class="multi-filter">
+                    {% for idx in range(4) %}
+                    <div class="form-group">
+                        <label for="filter3-{{ idx + 1 }}">Wert {{ idx + 1 }}:</label>
+                        <input type="text" id="filter3-{{ idx + 1 }}" name="filter3" value="{{ item.Filter3[idx] if item.Filter3 and item.Filter3|length > idx else '' }}">
+                    </div>
+                    {% endfor %}
+                </div>
+            </div>
+            {% endif %}
+
+            <!-- ================= DATES & FINANCIALS ================= -->
+            <div class="form-group">
+                <label for="anschaffungsjahr">Anschaffungsjahr:</label>
+                <input type="date" id="anschaffungsjahr" name="anschaffungsjahr" value="{{ item.Anschaffungsjahr|default('') }}">
+            </div>
+            <div class="form-group">
+                <label for="anschaffungskosten">Anschaffungskosten (€):</label>
+                <input type="text" id="anschaffungskosten" name="anschaffungskosten" value="{{ item.Anschaffungskosten|default('') }}">
+            </div>
+
+            {% if not show_library_features %}
+            <!-- ================= INVENTORY IMAGE MANAGEMENT ================= -->
+            <div class="form-group">
+                <label>Bestehende Bilder behalten:</label>
+                {% if item.Images and item.Images|length > 0 %}
+                <div class="existing-images-grid">
+                    {% for img in item.Images %}
+                    <div class="existing-image-card">
+                        <img src="{{ url_for('uploaded_file', filename=img) }}" alt="Bild">
+                        <label>
+                            <input type="checkbox" name="existing_images" value="{{ img }}" checked>
+                            Behalten
+                        </label>
+                    </div>
+                    {% endfor %}
+                </div>
+                {% else %}
+                <p style="color:#777; font-size:0.9em;">Keine Bilder vorhanden.</p>
+                {% endif %}
+
+                <label for="images" style="margin-top:15px;">Neue Bilder/Videos hinzufügen:</label>
+                <input type="file" id="images" name="images" accept=".jpg, .jpeg, .png, .gif, .mp4, .mov, .avi, .mkv, .webm" multiple>
+            </div>
+            {% endif %}
+
+            <div class="form-group">
+                <label for="reservierbar" style="display:inline-block; width:auto; margin-right:10px;">Reservierbar:</label>
+                <input type="checkbox" id="reservierbar" name="reservierbar" style="width:auto;" {% if item.Reservierbar %}checked{% endif %}>
+            </div>
+
+            <button type="submit" class="submit-button">Änderungen speichern</button>
+        </form>
+    </div>
+</div>
+
+<script src="https://cdn.jsdelivr.net/npm/@ericblade/quagga2/dist/quagga.js"></script>
+<script>
+    let scannerRunning = false;
+    let activeScannerCallback = null;
+    let code4LastScanned = '';
+    let code4LastScannedAt = 0;
+
+    function loadAndSelectFilterValues(filterNumber) {
+        fetch(`/get_predefined_filter_values/${filterNumber}`)
+            .then(res => res.json())
+            .then(data => {
+                for (let i = 1; i <= 4; i++) {
+                    const select = document.getElementById(`filter${filterNumber}-${i}`);
+                    if (!select) continue;
+
+                    const selectedValue = select.getAttribute('data-selected') || '';
+
+                    data.values.forEach(val => {
+                        if (!val || String(val).trim() === '') return;
+                        const opt = document.createElement('option');
+                        opt.value = val;
+                        opt.textContent = val;
+                        select.appendChild(opt);
+                    });
+
+                    if (selectedValue && !Array.from(select.options).some(o => o.value === selectedValue)) {
+                        const customOpt = document.createElement('option');
+                        customOpt.value = selectedValue;
+                        customOpt.textContent = selectedValue;
+                        select.appendChild(customOpt);
+                    }
+
+                    select.value = selectedValue;
+                }
+            })
+            .catch(err => console.error(`Error loading Filter ${filterNumber}:`, err));
+    }
+
+    function loadLocationOptions() {
+        fetch('/get_predefined_locations')
+            .then(res => res.json())
+            .then(data => {
+                const select = document.getElementById('ort');
+                if (!select) return;
+                const currentVal = select.getAttribute('data-selected') || select.value;
+
+                data.locations.forEach(loc => {
+                    if (!Array.from(select.options).some(o => o.value === loc)) {
+                        const opt = document.createElement('option');
+                        opt.value = loc;
+                        opt.textContent = loc;
+                        select.appendChild(opt);
+                    }
+                });
+
+                select.value = currentVal;
+            })
+            .catch(err => console.error('Error loading locations:', err));
+    }
+
+    function addNewLocation() {
+        const input = document.getElementById('new-location-input');
+        const val = input.value.trim();
+        if (!val) return;
+        const select = document.getElementById('ort');
+        const opt = document.createElement('option');
+        opt.value = val;
+        opt.textContent = val;
+        opt.selected = true;
+        select.appendChild(opt);
+        document.getElementById('new-location-container').style.display = 'none';
+        input.value = '';
+    }
+
+    function cancelAddLocation() {
+        document.getElementById('new-location-container').style.display = 'none';
+        document.getElementById('new-location-input').value = '';
+    }
+
+    function runEngineInitialization(targetSelector, activeCallback, completionMsg, errorStatusSetter) {
+        if (scannerRunning) { Quagga.stop(); scannerRunning = false; }
+        activeScannerCallback = activeCallback;
+
+        Quagga.init({
+            inputStream: { name: "Live", type: "LiveStream", target: document.querySelector(targetSelector), constraints: { width: 640, height: 480, facingMode: "environment" } },
+            decoder: { readers: ["code_128_reader", "ean_reader", "code_39_reader", "upc_reader"] }
+        }, function(err) {
+            if (err) { errorStatusSetter("Kamera-Fehler.", true); return; }
+            Quagga.start(); scannerRunning = true; errorStatusSetter(completionMsg, false);
+        });
+    }
+
+    function killScannerHardware() {
+        if (!scannerRunning) return;
+        Quagga.stop(); scannerRunning = false; activeScannerCallback = null;
+    }
+
+    Quagga.onDetected(function(data) {
+        if (!data || !data.codeResult || !data.codeResult.code) return;
+        if (typeof activeScannerCallback === "function") activeScannerCallback(String(data.codeResult.code).trim());
+    });
+
+    function startCode4Scanner() {
+        const scannerBox = document.getElementById('code4-scanner');
+        const scanBtn = document.getElementById('scan-code4-btn');
+        const baseField = document.getElementById('code_4');
+        const indArea = document.getElementById('individual_codes');
+
+        if (scannerBox.style.display !== 'none') {
+            killScannerHardware(); scannerBox.style.display = 'none'; scanBtn.textContent = 'Barcode scannen'; return;
+        }
+
+        scannerBox.style.display = 'block'; scanBtn.textContent = 'Scanner stoppen';
+        runEngineInitialization('#code4-scanner', function(decodedText) {
+            const now = Date.now();
+            if (decodedText === code4LastScanned && (now - code4LastScannedAt) < 1500) return;
+            code4LastScanned = decodedText; code4LastScannedAt = now;
+
+            killScannerHardware(); scannerBox.style.display = 'none'; scanBtn.textContent = 'Barcode scannen';
+
+            if (!baseField.value.trim()) {
+                baseField.value = decodedText;
+            } else {
+                let codes = indArea.value.split('\n').map(c => c.trim()).filter(c => c);
+                if (!codes.includes(decodedText) && baseField.value.trim() !== decodedText) {
+                    codes.push(decodedText);
+                    indArea.value = codes.join('\n');
+                }
+            }
+        }, 'Scanner läuft...', msg => { document.getElementById('code4-scan-status').textContent = msg; });
+    }
+
+    document.addEventListener('DOMContentLoaded', function() {
+        loadLocationOptions();
+
+        // Load Filter options if elements exist on page
+        if (document.getElementById('filter1-1')) {
+            loadAndSelectFilterValues(1);
+            loadAndSelectFilterValues(2);
+        }
+
+        const scanCodeBtn = document.getElementById('scan-code4-btn');
+        if (scanCodeBtn) scanCodeBtn.addEventListener('click', startCode4Scanner);
+
+        const addLocBtn = document.getElementById('add-new-location-btn');
+        if (addLocBtn) addLocBtn.addEventListener('click', () => {
+            const c = document.getElementById('new-location-container');
+            c.style.display = c.style.display === 'none' ? 'block' : 'none';
+        });
+    });
+</script>
+{% endblock %}

Web/templates/main_admin.html

@@ -1951,11 +1951,6 @@
         display: none;
     }
 
-    /* Edit new location container */
-    .edit-new-location-container {
-        display: none;
-        margin-top: 10px;
-    }
 
     /* Modal dialog styling */
     .modal-dialog-white {
@@ -1969,11 +1964,6 @@
         margin-top: 10px;
     }
 
-    /* Element text colors for better visibility */
-    .edit-button, .duplicate-button, .generate-qr-button {
-        color: var(--ui-title) !important;
-    }
-    
     /* Standardized button styles across the application */
     .search-button, .scan-button, .filter-toggle, .clear-filter, 
     .add-new-btn, .popup-close-button, .prev-image-button, .next-image-button,
@@ -2474,187 +2464,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
             </div>
         </div>
     </div>
-
-    <!-- Add the edit modal form -->
-    {% if current_permissions.actions.get('can_edit', False) %}
-    <div id="edit-modal" class="item-modal">
-        <div class="modal-content">
-            <span class="close-modal" onclick="closeEditModal()">&times;</span>
-            <h2>Objekt bearbeiten</h2>
-            <form id="edit-item-form" method="POST" enctype="multipart/form-data">
-                <input type="hidden" id="edit-item-id" name="id">
-                <div class="form-row">
-                    <div class="form-group">
-                        <label for="edit-name">Name:</label>
-                        <input type="text" id="edit-name" name="name" required>
-                    </div>
-                    <div class="form-group">
-                        <label for="edit-location">Ort:</label>
-                        <select id="edit-location" name="ort" required>
-                            <option value="">-- Bitte Ort auswählen --</option>
-                            <!-- Options will be loaded by JavaScript -->
-                        </select>
-                        <button type="button" class="add-new-btn" id="edit-add-new-location-btn">
-                            Neuen Ort hinzufügen
-                        </button>
-                        <div id="edit-new-location-container" class="edit-new-location-container">
-                            <input type="text" id="edit-new-location-input" placeholder="Neuen Ort eingeben">
-                            <button type="button" onclick="addNewLocation('edit')">Hinzufügen</button>
-                            <button type="button" onclick="cancelAddLocation('edit')">Abbrechen</button>
-                        </div>
-                    </div>
-                </div>
-                <div class="form-group">
-                    <label for="edit-description">Beschreibung:</label>
-                    <textarea id="edit-description" name="beschreibung" required></textarea>
-                </div>
-                
-                <!-- Updated filter inputs for edit form with dropdowns -->
-                <div class="filter-inputs">
-                    <h3>Unterrichtsfach:</h3>
-                    <div class="multi-filter">
-                        <div class="form-group">
-                            <label for="edit-filter1-1">Wert 1:</label>
-                            <select id="edit-filter1-1" name="filter" class="filter-dropdown-select">
-                                <option value="">-- Bitte auswählen --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter1-2">Wert 2:</label>
-                            <select id="edit-filter1-2" name="filter" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter1-3">Wert 3:</label>
-                            <select id="edit-filter1-3" name="filter" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter1-4">Wert 4:</label>
-                            <select id="edit-filter1-4" name="filter" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                    </div>
-                    
-                    <h3>Jahrgangsstufe:</h3>
-                    <div class="multi-filter">
-                        <div class="form-group">
-                            <label for="edit-filter2-1">Wert 1:</label>
-                            <select id="edit-filter2-1" name="filter2" class="filter-dropdown-select">
-                                <option value="">-- Bitte auswählen --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter2-2">Wert 2:</label>
-                            <select id="edit-filter2-2" name="filter2" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter2-3">Wert 3:</label>
-                            <select id="edit-filter2-3" name="filter2" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter2-4">Wert 4:</label>
-                            <select id="edit-filter2-4" name="filter2" class="filter-dropdown-select">
-                                <option value="">-- Optional --</option>
-                                <!-- Options will be loaded by JavaScript -->
-                            </select>
-                        </div>
-                    </div>
-                    
-                    <h3>Schlagwort:</h3>
-                    <div class="multi-filter">
-                        <div class="form-group">
-                            <label for="edit-filter3-1">Wert 1:</label>
-                            <input type="text" id="edit-filter3-1" name="filter3">
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter3-2">Wert 2:</label>
-                            <input type="text" id="edit-filter3-2" name="filter3">
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter3-3">Wert 3:</label>
-                            <input type="text" id="edit-filter3-3" name="filter3">
-                        </div>
-                        <div class="form-group">
-                            <label for="edit-filter3-4">Wert 4:</label>
-                            <input type="text" id="edit-filter3-4" name="filter3">
-                        </div>
-                    </div>
-                </div>
-                
-                <div class="form-group">
-                    <label for="edit-year">Anschaffungsjahr:</label>
-                    <input type="date" id="edit-year" name="anschaffungsjahr">
-                </div>
-                <div class="form-group">
-                    <label for="edit-cost">Anschaffungskosten (€):</label>
-                    <input id="edit-cost" name="anschaffungskosten">
-                </div>
-                <div class="form-group">
-                    <label for="edit-code4">Code:</label>
-                    <div style="display:flex; gap:8px; align-items:center; flex-wrap:wrap;">
-                        <input id="edit-code4" name="code_4">
-                        <button type="button" class="fetch-isbn-button" id="scan-edit-code-btn">Barcode scannen</button>
-                    </div>
-                </div>
-                
-                <div class="form-group">
-                    <label for="edit-reservierbar" style="display:inline-block; width:auto; margin-right:10px;">Reservierbar:</label>
-                    <input type="checkbox" id="edit-reservierbar" name="reservierbar" style="width:auto;">
-                    <small style="display:block; color:#666;">Wenn deaktiviert, kann der Artikel nicht im Voraus reserviert werden.</small>
-                </div>
-
-                <!-- New section for managing images -->
-                <div class="form-group">
-                    <label>Vorhandene Bilder:</label>
-                    <div id="edit-existing-images" class="existing-images-container">
-                        <!-- Existing images will be added here dynamically -->
-                    </div>
-                </div>
-                
-                <div class="form-group">
-                    <label for="edit-new-images">
-                        <span>Neue Bilder/Videos hinzufügen:</span>
-                        <span>(Bilder/Videos werden vom Original übernommen)</span>
-                    </label>
-                    <input type="file" id="edit-new-images" name="new_images" accept=".jpg, .jpeg, .png, .gif, .mp4, .mov, .avi, .mkv, .webm, .flv, .m4v, .3gp" multiple>
-                    <div class="allowed-formats">Erlaubte Formate: JPG, JPEG, PNG, GIF, MP4, MOV, AVI, MKV, WEBM, FLV, M4V, 3GP</div>
-                    <!-- Add image preview container -->
-                    <div class="image-preview-container" id="edit-image-preview-container"></div>
-                </div>
-                
-                <div class="form-group">
-                    <label for="edit-isbn">ISBN:</label>
-                    <div class="isbn-input-group">
-                        <input type="text" id="edit-isbn" name="isbn" placeholder="ISBN eingeben...">
-                        <button type="button" class="fetch-isbn-button" id="scan-edit-isbn-btn">ISBN scannen</button>
-                        <button type="button" class="fetch-isbn-button" onclick="fetchBookInfo('edit')">Buchinformationen abrufen</button>
-                    </div>
-                    <div id="edit-book-info-container" class="book-info-container"></div>
-                </div>
-                
-                <div class="form-actions">
-                    <button type="submit" class="save-button">Speichern</button>
-                    <button type="button" class="cancel-button" onclick="closeEditModal()">Abbrechen</button>
-                </div>
-            </form>
-        </div>
-    </div>
-    {% endif %}
 </div>
 
 <!-- Schedule Appointment Modal -->
@@ -2889,58 +2698,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
         }
     });
 
-    function scanIntoEditCode() {
-        const qrReader = document.getElementById('qr-reader');
-        const editCodeInput = document.getElementById('edit-code4');
-        const scanEditBtn = document.getElementById('scan-edit-code-btn');
-        if (!qrReader || !editCodeInput || !scanEditBtn) {
-            return;
-        }
-
-        // Toggle close if it's already running
-        if (isScanning && qrReader.style.display !== 'none') {
-            stopScanner();
-            scanEditBtn.textContent = 'Barcode scannen';
-            return;
-        }
-
-        scanEditBtn.textContent = 'Scanner schließen';
-
-        // Start scanner with custom logic mapping to the Code input field
-        startScanner(function(decodedText) {
-            editCodeInput.value = decodedText;
-            validateCodeField(editCodeInput, document.getElementById('edit-item-id')?.value || null);
-            scanEditBtn.textContent = 'Barcode scannen';
-        });
-    }
-
-    function scanIntoEditIsbn() {
-        const qrReader = document.getElementById('qr-reader');
-        const editIsbnInput = document.getElementById('edit-isbn');
-        const scanIsbnBtn = document.getElementById('scan-edit-isbn-btn');
-        if (!qrReader || !editIsbnInput || !scanIsbnBtn) {
-            return;
-        }
-
-        // Toggle close if it's already running
-        if (isScanning && qrReader.style.display !== 'none') {
-            stopScanner();
-            scanIsbnBtn.textContent = 'ISBN scannen';
-            return;
-        }
-
-        scanIsbnBtn.textContent = 'Scanner schließen';
-
-        // Start scanner with custom logic mapping to the ISBN input field
-        startScanner(function(decodedText) {
-            editIsbnInput.value = decodedText;
-            scanIsbnBtn.textContent = 'ISBN scannen';
-            if (typeof fetchBookInfo === 'function') {
-                fetchBookInfo('edit');
-            }
-        });
-    }
-
     function rebuildFilter3Options() {
         if (!allItems) return;
         
@@ -3324,21 +3081,11 @@ document.addEventListener('DOMContentLoaded', ()=>{
         loadPredefinedFilterValues(1);
         loadPredefinedFilterValues(2);
         loadPredefinedFilterValues(3);
-        
-        // Set up edit form submission
-        setupEditFormSubmission();
+
         
         // Set up schedule form submission
         setupScheduleFormSubmission();
-        
-        // Set up add new location buttons
-        const editAddLocationBtn = document.getElementById('edit-add-new-location-btn');
-        if (editAddLocationBtn) {
-            editAddLocationBtn.addEventListener('click', function() {
-                const container = document.getElementById('edit-new-location-container');
-                container.style.display = container.style.display === 'none' ? 'block' : 'none';
-            });
-        }
+
         
         // Find and attach event listener to all logout links
         const logoutLinks = document.querySelectorAll('a[href*="logout"]');
@@ -3391,35 +3138,11 @@ document.addEventListener('DOMContentLoaded', ()=>{
         // Close modals when clicking outside
         window.onclick = function(event) {
             const itemModal = document.getElementById('item-modal');
-            const editModal = document.getElementById('edit-modal');
             
             if (event.target === itemModal) {
                 itemModal.style.display = 'none';
             }
-            if (event.target === editModal) {
-                editModal.style.display = 'none';
-            }
         };
-
-        // Set up code validation for edit form
-        const editCodeField = document.getElementById('edit-code4');
-        if (editCodeField) {
-            editCodeField.addEventListener('blur', function() {
-                const itemIdField = document.getElementById('edit-item-id');
-                const excludeId = itemIdField ? itemIdField.value : null;
-                validateCodeField(this, excludeId);
-            });
-        }
-
-        const scanEditCodeBtn = document.getElementById('scan-edit-code-btn');
-        if (scanEditCodeBtn) {
-            scanEditCodeBtn.addEventListener('click', scanIntoEditCode);
-        }
-
-        const scanEditIsbnBtn = document.getElementById('scan-edit-isbn-btn');
-        if (scanEditIsbnBtn) {
-            scanEditIsbnBtn.addEventListener('click', scanIntoEditIsbn);
-        }
     });
 
     // Function to load items from server
@@ -4171,163 +3894,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
             });
     }
 
-    function openEditModalForSelectedUnit(defaultItemId, selectId) {
-        let targetItemId = defaultItemId;
-
-        try {
-            const selectedUnit = selectId ? document.getElementById(selectId) : null;
-            if (selectedUnit && selectedUnit.value) {
-                targetItemId = selectedUnit.value;
-            }
-        } catch (e) {
-            // Keep default item id as fallback.
-        }
-
-        openEditModalFromServer(targetItemId);
-    }
-
-    function closeEditModal() {
-        const editModal = document.getElementById('edit-modal');
-        if (editModal) {
-            editModal.style.display = 'none';
-        }
-    }
-
-    function openEditModalFromServer(itemId) {
-        const editModal = document.getElementById('edit-modal');
-        if (!editModal) {
-            console.error('Edit modal nicht gefunden');
-            return;
-        }
-
-        console.log('DEBUG: openEditModal called with itemId:', itemId);
-
-        // Fetch the item data from the backend
-        fetch(`/get_item/${itemId}`)
-            .then(response => {
-                console.log('DEBUG: Response status:', response.status);
-                if (!response.ok) throw new Error(`HTTP ${response.status}`);
-                return response.json();
-            })
-            .then(data => {
-                console.log('DEBUG: Fetched data:', data);
-                // Backend returns the item directly or wrapped in error/success
-                const item = data.error ? null : (data.item || data);
-                
-                console.log('DEBUG: Parsed item:', item);
-                
-                if (!item || !item._id) {
-                    console.error('DEBUG: Item not found or invalid');
-                    alert('Item nicht gefunden');
-                    return;
-                }
-
-                // Fill in the form fields with the item data
-                document.getElementById('edit-item-id').value = item._id || '';
-                document.getElementById('edit-name').value = item.Name || '';
-                document.getElementById('edit-location').value = item.Ort || '';
-                document.getElementById('edit-description').value = item.Beschreibung || '';
-                document.getElementById('edit-year').value = item.Anschaffungsjahr || '';
-                document.getElementById('edit-cost').value = item.Anschaffungskosten || '';
-                document.getElementById('edit-code4').value = item.Code_4 || '';
-                document.getElementById('edit-isbn').value = item.ISBN || '';
-                document.getElementById('edit-reservierbar').checked = item.Reservierbar !== false;
-
-                // Fill in filter 1 (Unterrichtsfach)
-                const filter1Array = Array.isArray(item.Filter) ? item.Filter : (item.Filter ? [item.Filter] : []);
-                document.getElementById('edit-filter1-1').value = filter1Array[0] || '';
-                document.getElementById('edit-filter1-2').value = filter1Array[1] || '';
-                document.getElementById('edit-filter1-3').value = filter1Array[2] || '';
-                document.getElementById('edit-filter1-4').value = filter1Array[3] || '';
-
-                // Fill in filter 2 (Jahrgangsstufe)
-                const filter2Array = Array.isArray(item.Filter2) ? item.Filter2 : (item.Filter2 ? [item.Filter2] : []);
-                document.getElementById('edit-filter2-1').value = filter2Array[0] || '';
-                document.getElementById('edit-filter2-2').value = filter2Array[1] || '';
-                document.getElementById('edit-filter2-3').value = filter2Array[2] || '';
-                document.getElementById('edit-filter2-4').value = filter2Array[3] || '';
-
-                // Fill in filter 3 (Schlagwort)
-                const filter3Array = Array.isArray(item.Filter3) ? item.Filter3 : (item.Filter3 ? [item.Filter3] : []);
-                document.getElementById('edit-filter3-1').value = filter3Array[0] || '';
-                document.getElementById('edit-filter3-2').value = filter3Array[1] || '';
-                document.getElementById('edit-filter3-3').value = filter3Array[2] || '';
-                document.getElementById('edit-filter3-4').value = filter3Array[3] || '';
-
-                // Display existing images
-                const existingImagesContainer = document.getElementById('edit-existing-images');
-                const editForm = document.getElementById('edit-item-form');
-                existingImagesContainer.innerHTML = '';
-                if (editForm) {
-                    editForm.querySelectorAll('input[name="existing_images"], input[name="removed_images"]').forEach(input => input.remove());
-                }
-                if (item.Images && Array.isArray(item.Images)) {
-                    item.Images.forEach((image, index) => {
-                        const isVideo = isVideoFile(image);
-                        const imageDiv = document.createElement('div');
-                        imageDiv.className = 'existing-image-item';
-                        imageDiv.style.marginBottom = '10px';
-
-                        const thumbnailInfo = item.ThumbnailInfo && item.ThumbnailInfo[index];
-                        const imageSrc = thumbnailInfo && thumbnailInfo.has_preview ? 
-                            thumbnailInfo.preview_url : 
-                            (image.startsWith('/uploads/') || image.startsWith('http') ? 
-                                image : 
-                                `{{ url_for('uploaded_file', filename='') }}${image}`);
-
-                        const row = document.createElement('div');
-                        row.style.display = 'flex';
-                        row.style.gap = '8px';
-                        row.style.alignItems = 'center';
-
-                        if (isVideo) {
-                            const video = document.createElement('video');
-                            video.src = imageSrc;
-                            video.style.maxWidth = '100px';
-                            video.style.maxHeight = '100px';
-                            video.style.objectFit = 'contain';
-                            video.controls = true;
-                            row.appendChild(video);
-                        } else {
-                            const img = document.createElement('img');
-                            img.src = imageSrc;
-                            img.style.maxWidth = '100px';
-                            img.style.maxHeight = '100px';
-                            img.style.objectFit = 'contain';
-                            img.alt = `Existierendes Bild ${index + 1}`;
-                            row.appendChild(img);
-                        }
-
-                        const deleteButton = document.createElement('button');
-                        deleteButton.type = 'button';
-                        deleteButton.className = 'delete-image-button';
-                        deleteButton.textContent = 'Löschen';
-                        deleteButton.addEventListener('click', () => removeExistingImage(image, deleteButton));
-                        row.appendChild(deleteButton);
-
-                        imageDiv.appendChild(row);
-                        existingImagesContainer.appendChild(imageDiv);
-
-                        if (editForm) {
-                            const hiddenInput = document.createElement('input');
-                            hiddenInput.type = 'hidden';
-                            hiddenInput.name = 'existing_images';
-                            hiddenInput.value = image;
-                            editForm.appendChild(hiddenInput);
-                        }
-
-                    });
-                }
-
-                // Display the modal
-                editModal.style.display = 'block';
-            })
-            .catch(error => {
-                console.error('Fehler beim Laden des Items:', error);
-                alert('Fehler beim Laden des Items');
-            });
-    }
-
     function escapeHtml(value) {
         return String(value ?? '').replace(/[&<>'"]/g, (char) => {
             const map = {
@@ -4687,7 +4253,9 @@ document.addEventListener('DOMContentLoaded', ()=>{
                 <button type="button" class="details-button" onclick="document.getElementById('item-modal').style.display='none';">Schließen</button>
             </div>
         `;
-        
+
+
+
         modal.style.display = 'block';
         
         const closeButton = modal.querySelector('.close-modal');
@@ -4924,6 +4492,13 @@ document.addEventListener('DOMContentLoaded', ()=>{
         });
     }
 
+    function openEditModalForSelectedUnit(itemId, selectId) {
+    const select = document.getElementById(selectId);
+    const targetId = (select && select.value) ? select.value : itemId;
+    // Leitet auf die Bearbeiten-Seite weiter und übergibt die aktuelle URL für den Redirect nach dem Speichern
+    window.location.href = `/item_edit/${targetId}`;
+    }
+
     function changeModalImage(direction) {
         const currentIndex = window.currentModalImageIndex;
         const total = window.totalModalImages;
@@ -5350,8 +4925,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
         });
     }
 
-    // Load location options for edit modal
-    // Edit-related functions moved to edit_item_functions.html
 
     // Schedule modal functions
     function openScheduleModal(itemId) {
@@ -5471,50 +5044,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
         }
     }
 
-    // Setup edit form submission
-    function setupEditFormSubmission() {
-        const editForm = document.getElementById('edit-item-form');
-        if (editForm) {
-            editForm.addEventListener('submit', function(e) {
-                e.preventDefault();
-                
-                const itemId = document.getElementById('edit-item-id').value;
-                const formData = new FormData(this);
-                
-                fetch(`/edit_item/${itemId}`, {
-                    method: 'POST',
-                    body: formData
-                })
-                .then(response => {
-                    if (response.ok) {
-                        closeEditModal();
-                        // Reload items to show updated information
-                        loadItems();
-                        // Show success message
-                        const successMsg = document.createElement('div');
-                        successMsg.className = 'alert alert-success';
-                        successMsg.textContent = 'Item wurde erfolgreich aktualisiert!';
-                        successMsg.style.position = 'fixed';
-                        successMsg.style.top = '20px';
-                        successMsg.style.right = '20px';
-                        successMsg.style.zIndex = '9999';
-                        document.body.appendChild(successMsg);
-                        setTimeout(() => {
-                            if (successMsg.parentNode) {
-                                successMsg.parentNode.removeChild(successMsg);
-                            }
-                        }, 3000);
-                    } else {
-                        alert('Fehler beim Aktualisieren des Items');
-                    }
-                })
-                .catch(error => {
-                    console.error('Error updating item:', error);
-                    alert('Fehler beim Aktualisieren des Items');
-                });
-            });
-        }
-    }
 
     // Duplication function
     function duplicateItem(itemId) {
@@ -5690,9 +5219,6 @@ document.addEventListener('DOMContentLoaded', ()=>{
     }
 </script>
 
-<!-- Include edit item functions -->
-{% include "edit_item_functions.html" %}
-
 <!-- Include reset item functions -->
 {% include "reset_item_functions.html" %}
 
@@ -5920,16 +5446,4 @@ document.addEventListener('DOMContentLoaded', ()=>{
     }
 }
 </style>
-
-{% if open_item %}
-<script>
-    document.addEventListener("DOMContentLoaded", function() {
-        if (typeof openEditModalFromServer === 'function') {
-            setTimeout(function() {
-                openEditModalFromServer('{{ open_item }}');
-            }, 500);
-        }
-    });
-</script>
-{% endif %}
 {% endblock %}

Web/templates/register.html

@@ -6,7 +6,7 @@
 <div class="container">
     <div class="header-section">
         <h1>Neuen Benutzer registrieren</h1>
-        <p class="subtitle">Erstellen Sie ein neues Benutzerkonto und legen Sie Zugriffsrechte fest</p>
+        <p class="subtitle">Erstellen Sie ein neues Benutzerkonto oder importieren Sie mehrere Benutzer per CSV</p>
     </div>
 
     <div class="flash-container">
@@ -23,7 +23,43 @@
     </div>
 
     <div class="content">
+        <!-- 1. CSV BULK IMPORT CARD -->
+        <div class="form-card" style="margin-bottom: 2rem; border-top: 4px solid #059669;">
+            <div class="card-header" style="margin-bottom: 1rem;">
+                <h2>Massenregistrierung via CSV</h2>
+                <p class="subtitle" style="color: #4b5563;">
+                    Laden Sie eine CSV-Datei hoch (Format: <code>Vorname, Nachname</code>).
+                    Benutzernamen und sichere Passwörter werden serverseitig generiert. Nach dem Upload erhalten Sie direkt ein PDF mit Zugangsdaten (2 pro Seite zum Ausschneiden).
+                </p>
+            </div>
+
+            <form method="POST" action="{{ url_for('register_csv') }}" enctype="multipart/form-data">
+                <div class="form-group">
+                    <label for="permission-preset-csv">Berechtigungs-Preset für alle CSV-Benutzer</label>
+                    <select id="permission-preset-csv" name="permission_preset" class="form-select" style="margin-bottom: 1rem;">
+                        {% for preset_key, preset in permission_presets.items() %}
+                        <option value="{{ preset_key }}">{{ preset.label }}</option>
+                        {% endfor %}
+                    </select>
+
+                    <label for="csv_file">CSV-Datei auswählen</label>
+                    <div class="input-container">
+                        <span class="input-icon">📄</span>
+                        <input type="file" id="csv_file" name="csv_file" accept=".csv" required style="padding: 10px;">
+                    </div>
+                </div>
+
+                <div class="form-group form-actions" style="margin-top: 1.5rem;">
+                    <button type="submit" class="action-button" style="background-color: #059669; color: white;">
+                        📥 CSV Importieren & Zugangsdaten-PDF Herunterladen
+                    </button>
+                </div>
+            </form>
+        </div>
+
+        <!-- 2. SINGLE USER REGISTRATION CARD -->
         <div class="form-card">
+            <h2>Einzelnen Benutzer registrieren</h2>
             <form method="POST" action="{{ url_for('register') }}">
 
                 <div class="form-group">
@@ -32,11 +68,13 @@
                         <span class="input-icon">👤</span>
                         <input type="text" id="name" name="name" placeholder="Geben Sie den Vornamen ein" required onchange="generateUsername()" oninput="generateUsername()">
                     </div>
+
                     <label for="last-name">Nachname</label>
                     <div class="input-container">
                         <span class="input-icon">👤</span>
                         <input type="text" id="last-name" name="last-name" placeholder="Geben Sie den Nachnamen ein" required onchange="generateUsername()" oninput="generateUsername()">
                     </div>
+
                     <label for="username">Benutzername <span style="color: #9ca3af;">(Vorschau - wird serverseitig finalisiert)</span></label>
                     <div class="input-container">
                         <span class="input-icon">👤</span>
@@ -44,7 +82,7 @@
                     </div>
                     <p class="anonymize-hint">Klarnamen werden nur zur Erzeugung des Benutzernamens als Kürzel (z.B. SimFri) verwendet; bei Kollision wird automatisch ein Buchstabe mehr genommen.</p>
                 </div>
-                
+
                 <div class="form-group">
                     <label for="password">Passwort</label>
                     <div class="password-rules" id="password-rules" aria-live="polite">
@@ -57,20 +95,21 @@
                             <li id="pw-rule-symbol" class="pw-rule">Mindestens ein Sonderzeichen</li>
                         </ul>
                     </div>
-                    
+
                     <div class="input-wrapper">
                         <div class="input-container">
                             <span class="input-icon">🔒</span>
-                            <!-- HTML5 Pattern blockiert unsichere Passwörter vor dem Absenden -->
-                            <input 
-                                   id="password" 
-                                   name="password" 
-                                   placeholder="Geben Sie ein sicheres Passwort ein" 
+                            <input
+                                   type="password"
+                                   id="password"
+                                   name="password"
+                                   placeholder="Geben Sie ein sicheres Passwort ein"
                                    required
                                    pattern="(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[^a-zA-Z0-9]).{12,}">
+                            <button type="button" id="toggle-pw-btn" class="toggle-pw-btn" onclick="togglePasswordVisibility()" style="background:none; border:none; cursor:pointer; padding-right:10px;">👁️</button>
                         </div>
                     </div>
-                    <div class="pw-actions">
+                    <div class="pw-actions" style="margin-top: 8px;">
                         <button type="button" class="btn-secondary" onclick="generateSecurePassword()">Passwort generieren</button>
                     </div>
                 </div>
@@ -120,323 +159,6 @@
     </div>
 </div>
 
-<style>
-:root {
-    --primary-color: #3498db;
-    --primary-dark: #2980b9;
-    --success-color: #2ecc71;
-    --error-color: #e74c3c;
-    --text-color: var(--ui-text);
-    --light-bg: #f9f9f9;
-    --border-radius: 8px;
-    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
-    --transition: all 0.3s ease;
-}
-
-body {
-    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
-    background-color: var(--light-bg);
-    margin: 0;
-    padding: 0;
-    color: var(--text-color);
-    line-height: 1.6;
-}
-
-.container {
-    max-width: 800px;
-    margin: 2rem auto;
-    padding: 0 1.5rem;
-}
-
-.header-section {
-    text-align: center;
-    margin-bottom: 2rem;
-    padding-bottom: 1.5rem;
-    border-bottom: 1px solid #eee;
-}
-
-.header-section h1 {
-    font-size: 2.5rem;
-    margin-bottom: 0.5rem;
-    color: var(--primary-color);
-}
-
-.subtitle {
-    font-size: 1.1rem;
-    color: #777;
-    margin-top: 0;
-}
-
-.content {
-    background-color: var(--ui-surface);
-    padding: 2rem;
-    border-radius: var(--border-radius);
-    box-shadow: var(--shadow);
-    margin-bottom: 2rem;
-}
-
-.form-card {
-    max-width: 500px;
-    margin: 0 auto;
-}
-
-.form-group {
-    margin-bottom: 1.5rem;
-}
-
-.form-group label {
-    display: block;
-    margin-bottom: 0.5rem;
-    font-weight: 500;
-    color: var(--primary-dark);
-}
-
-.input-container {
-    position: relative;
-}
-
-.input-icon {
-    position: absolute;
-    left: 1rem;
-    top: 50%;
-    transform: translateY(-50%);
-    color: #aaa;
-    font-size: 1.2rem;
-}
-
-input[type="text"],
-input[type="password"],
-.form-select {
-    width: 100%;
-    padding: 0.8rem 1rem 0.8rem 3rem;
-    border: 1px solid #ddd;
-    border-radius: var(--border-radius);
-    font-size: 1rem;
-    transition: var(--transition);
-    box-sizing: border-box;
-}
-
-input[type="text"]:focus,
-input[type="password"]:focus,
-.form-select:focus {
-    border-color: var(--primary-color);
-    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
-    outline: none;
-}
-
-.form-select {
-    padding-left: 1rem;
-}
-
-input::placeholder {
-    color: #aaa;
-}
-
-.form-actions {
-    margin-top: 2rem;
-}
-
-.action-button {
-    background-color: var(--primary-color);
-    color: white;
-    border: none;
-    padding: 0.8rem 1.5rem;
-    border-radius: 30px;
-    cursor: pointer;
-    font-weight: 600;
-    transition: var(--transition);
-    width: 100%;
-    font-size: 1rem;
-}
-
-.action-button:hover {
-    background-color: var(--primary-dark);
-    transform: translateY(-2px);
-    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
-}
-
-.register-button {
-    background-color: var(--success-color);
-}
-
-.register-button:hover {
-    background-color: #27ae60;
-}
-
-.flash-container {
-    margin-bottom: 1.5rem;
-}
-
-.flash {
-    display: flex;
-    align-items: center;
-    padding: 1rem;
-    margin-bottom: 1rem;
-    border-radius: var(--border-radius);
-    animation: fadeIn 0.3s ease-in-out;
-}
-
-.flash-icon {
-    margin-right: 0.8rem;
-    font-size: 1.2rem;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    width: 24px;
-    height: 24px;
-    border-radius: 50%;
-    background-color: rgba(255, 255, 255, 0.3);
-}
-
-.flash.success {
-    background-color: #d4edda;
-    color: #155724;
-    border-left: 4px solid var(--success-color);
-}
-
-.flash.error {
-    background-color: #f8d7da;
-    color: #721c24;
-    border-left: 4px solid var(--error-color);
-}
-
-@keyframes fadeIn {
-    from { opacity: 0; transform: translateY(-10px); }
-    to { opacity: 1; transform: translateY(0); }
-}
-
-@media (max-width: 768px) {
-    .container {
-        padding: 0 1rem;
-        margin: 1rem auto;
-    }
-    
-    .content {
-        padding: 1.5rem;
-    }
-    
-    .header-section h1 {
-        font-size: 2rem;
-    }
-}
-
-.password-rules {
-    margin-bottom: 10px;
-    padding: 10px 12px;
-    border: 1px solid #e5e7eb;
-    border-radius: 8px;
-    background: var(--ui-surface-soft);
-}
-
-.password-rules-title {
-    margin: 0 0 8px;
-    font-weight: 700;
-    color: #1f2937;
-    font-size: 0.92rem;
-}
-
-.password-rules ul {
-    list-style: none;
-    margin: 0;
-    padding: 0;
-}
-
-.pw-rule {
-    position: relative;
-    padding-left: 22px;
-    margin: 5px 0;
-    color: #b91c1c;
-    font-size: 0.9rem;
-}
-
-.pw-rule::before {
-    content: '✗';
-    position: absolute;
-    left: 0;
-    top: 0;
-    font-weight: 700;
-}
-
-.pw-rule.ok {
-    color: #166534;
-}
-
-.pw-rule.ok::before {
-    content: '✓';
-}
-
-.anonymize-hint {
-    margin-top: 10px;
-    margin-bottom: 0;
-    background: #f0f9ff;
-    border: 1px solid #bae6fd;
-    border-radius: 8px;
-    padding: 10px 12px;
-    color: #0c4a6e;
-    font-size: 0.92rem;
-}
-
-.permission-panels {
-    display: grid;
-    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
-    gap: 12px;
-}
-
-.permission-panel {
-    border: 1px solid #d1d5db;
-    border-radius: 8px;
-    padding: 10px;
-    background: var(--ui-surface-soft);
-}
-
-.permission-panel h4 {
-    margin: 0 0 8px;
-    font-size: 1rem;
-    color: #1f2937;
-}
-
-.permission-check {
-    display: flex;
-    align-items: center;
-    gap: 8px;
-    margin: 4px 0;
-    color: #1f2937;
-}
-
-/* Neue Styles für die Passwort-Erweiterungen */
-.pw-actions {
-    display: flex;
-    gap: 8px;
-    margin-top: 8px;
-}
-
-.btn-secondary {
-    padding: 8px 12px;
-    border: 1px solid #d1d5db;
-    background-color: #f3f4f6;
-    border-radius: 4px;
-    cursor: pointer;
-    font-size: 0.9em;
-    transition: background-color 0.2s;
-}
-
-.btn-secondary:hover {
-    background-color: #e5e7eb;
-}
-
-.input-wrapper {
-    display: flex;
-    align-items: center;
-    gap: 8px;
-    width: 100%;
-}
-
-.input-wrapper .input-container {
-    flex-grow: 1;
-    margin: 0;
-}
-</style>
-
 <script>
 // Hilfsfunktion: Umlaute auflösen und Sonderzeichen entfernen
 function cleanNameForUsername(text) {
@@ -462,7 +184,7 @@ function generateUsername() {
     const firstName = cleanNameForUsername(document.getElementById('name').value);
     const lastName = cleanNameForUsername(document.getElementById('last-name').value);
     let username = '';
-    
+
     if (firstName && lastName) {
         username = formatPart(firstName, 3) + formatPart(lastName, 3);
     } else if (firstName) {
@@ -470,7 +192,7 @@ function generateUsername() {
     } else if (lastName) {
         username = formatPart(lastName, 6);
     }
-    
+
     const usernameField = document.getElementById('username');
     if (usernameField) {
         usernameField.value = username || '';
@@ -503,11 +225,12 @@ function generateSecurePassword() {
 
     const pwField = document.getElementById('password');
     pwField.value = password;
-    
-    // Automatisch sichtbar machen, damit der User es kopieren kann
+
+    // Automatisch sichtbar machen
     pwField.type = 'text';
-    document.getElementById('toggle-pw-btn').textContent = '🙈';
-    
+    const toggleBtn = document.getElementById('toggle-pw-btn');
+    if (toggleBtn) toggleBtn.textContent = '🙈';
+
     updatePasswordRules();
 }
 
@@ -517,10 +240,10 @@ function togglePasswordVisibility() {
     const toggleBtn = document.getElementById('toggle-pw-btn');
     if (pwField.type === "password") {
         pwField.type = "text";
-        toggleBtn.textContent = '🙈';
+        if (toggleBtn) toggleBtn.textContent = '🙈';
     } else {
         pwField.type = "password";
-        toggleBtn.textContent = '👁️';
+        if (toggleBtn) toggleBtn.textContent = '👁️';
     }
 }
 
@@ -530,7 +253,7 @@ function updatePasswordRules() {
     if (!passwordInput) return;
 
     const value = String(passwordInput.value || '');
-    
+
     const setRuleState = (id, ok) => {
         const node = document.getElementById(id);
         if (node) node.classList.toggle('ok', !!ok);
@@ -592,4 +315,409 @@ document.addEventListener('DOMContentLoaded', function () {
     }
 });
 </script>
+
+<style>
+:root {
+    --primary-color: #3498db;
+    --primary-dark: #2980b9;
+    --success-color: #2ecc71;
+    --success-dark: #27ae60;
+    --csv-color: #059669;
+    --csv-dark: #047857;
+    --error-color: #e74c3c;
+    --text-color: var(--ui-text, #1f2937);
+    --light-bg: #f9f9f9;
+    --border-radius: 8px;
+    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
+    --transition: all 0.3s ease;
+}
+
+body {
+    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+    background-color: var(--light-bg);
+    margin: 0;
+    padding: 0;
+    color: var(--text-color);
+    line-height: 1.6;
+}
+
+.container {
+    max-width: 800px;
+    margin: 2rem auto;
+    padding: 0 1.5rem;
+}
+
+.header-section {
+    text-align: center;
+    margin-bottom: 2rem;
+    padding-bottom: 1.5rem;
+    border-bottom: 1px solid #eee;
+}
+
+.header-section h1 {
+    font-size: 2.5rem;
+    margin-bottom: 0.5rem;
+    color: var(--primary-color);
+}
+
+.subtitle {
+    font-size: 1.05rem;
+    color: #6b7280;
+    margin-top: 0;
+}
+
+.content {
+    background-color: var(--ui-surface, #ffffff);
+    padding: 2rem;
+    border-radius: var(--border-radius);
+    box-shadow: var(--shadow);
+    margin-bottom: 2rem;
+}
+
+/* Karten-Layout für Einzel- & Massenregistrierung */
+.form-card {
+    max-width: 620px;
+    margin: 0 auto 2.5rem auto;
+    padding: 1.5rem;
+    background: var(--ui-surface-soft, #f9fafb);
+    border: 1px solid #e5e7eb;
+    border-radius: var(--border-radius);
+}
+
+.form-card:last-child {
+    margin-bottom: 0;
+}
+
+.form-card h2 {
+    font-size: 1.4rem;
+    margin-top: 0;
+    margin-bottom: 0.5rem;
+    color: #111827;
+}
+
+.form-group {
+    margin-bottom: 1.25rem;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 0.4rem;
+    font-weight: 600;
+    font-size: 0.95rem;
+    color: #374151;
+}
+
+.input-container {
+    position: relative;
+    width: 100%;
+}
+
+.input-icon {
+    position: absolute;
+    left: 1rem;
+    top: 50%;
+    transform: translateY(-50%);
+    color: #9ca3af;
+    font-size: 1.1rem;
+    pointer-events: none;
+    z-index: 1;
+}
+
+/* Eingabefelder & Selects */
+input[type="text"],
+input[type="password"],
+input[type="file"],
+.form-select {
+    width: 100%;
+    padding: 0.75rem 1rem 0.75rem 2.8rem;
+    border: 1px solid #d1d5db;
+    border-radius: var(--border-radius);
+    font-size: 0.95rem;
+    background-color: #ffffff;
+    transition: var(--transition);
+    box-sizing: border-box;
+}
+
+input[type="text"]:focus,
+input[type="password"]:focus,
+input[type="file"]:focus,
+.form-select:focus {
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
+    outline: none;
+}
+
+.form-select {
+    padding-left: 1rem;
+    cursor: pointer;
+}
+
+/* Stylings für den CSV-Datei-Upload */
+input[type="file"] {
+    padding-left: 2.8rem;
+    cursor: pointer;
+}
+
+input[type="file"]::file-selector-button {
+    padding: 0.35rem 0.75rem;
+    border-radius: 4px;
+    border: 1px solid #d1d5db;
+    background: #f3f4f6;
+    color: #374151;
+    cursor: pointer;
+    margin-right: 12px;
+    font-weight: 500;
+    transition: var(--transition);
+}
+
+input[type="file"]::file-selector-button:hover {
+    background: #e5e7eb;
+}
+
+input::placeholder {
+    color: #9ca3af;
+}
+
+code {
+    background: #e0f2fe;
+    color: #0369a1;
+    padding: 2px 6px;
+    border-radius: 4px;
+    font-family: monospace;
+    font-size: 0.9em;
+}
+
+/* Buttons */
+.form-actions {
+    margin-top: 1.5rem;
+}
+
+.action-button {
+    background-color: var(--primary-color);
+    color: white;
+    border: none;
+    padding: 0.8rem 1.5rem;
+    border-radius: var(--border-radius);
+    cursor: pointer;
+    font-weight: 600;
+    transition: var(--transition);
+    width: 100%;
+    font-size: 1rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    gap: 8px;
+}
+
+.action-button:hover {
+    background-color: var(--primary-dark);
+    transform: translateY(-1px);
+    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
+}
+
+.register-button {
+    background-color: var(--success-color);
+}
+
+.register-button:hover {
+    background-color: var(--success-dark);
+}
+
+/* Toggle-Button für Passwort-Auge */
+.input-wrapper {
+    position: relative;
+    width: 100%;
+}
+
+.toggle-pw-btn {
+    position: absolute;
+    right: 0.75rem;
+    top: 50%;
+    transform: translateY(-50%);
+    background: none;
+    border: none;
+    cursor: pointer;
+    font-size: 1.1rem;
+    padding: 4px;
+    z-index: 2;
+    opacity: 0.7;
+    transition: opacity 0.2s;
+}
+
+.toggle-pw-btn:hover {
+    opacity: 1;
+}
+
+/* Passwort-Regeln Box */
+.password-rules {
+    margin-bottom: 10px;
+    padding: 10px 12px;
+    border: 1px solid #e5e7eb;
+    border-radius: 8px;
+    background: #ffffff;
+}
+
+.password-rules-title {
+    margin: 0 0 6px;
+    font-weight: 700;
+    color: #1f2937;
+    font-size: 0.88rem;
+}
+
+.password-rules ul {
+    list-style: none;
+    margin: 0;
+    padding: 0;
+}
+
+.pw-rule {
+    position: relative;
+    padding-left: 20px;
+    margin: 4px 0;
+    color: #dc2626;
+    font-size: 0.85rem;
+}
+
+.pw-rule::before {
+    content: '✗';
+    position: absolute;
+    left: 0;
+    top: 0;
+    font-weight: 700;
+}
+
+.pw-rule.ok {
+    color: #166534;
+}
+
+.pw-rule.ok::before {
+    content: '✓';
+}
+
+.pw-actions {
+    display: flex;
+    gap: 8px;
+    margin-top: 8px;
+}
+
+.btn-secondary {
+    padding: 6px 12px;
+    border: 1px solid #d1d5db;
+    background-color: #ffffff;
+    color: #374151;
+    border-radius: 6px;
+    cursor: pointer;
+    font-size: 0.88rem;
+    font-weight: 500;
+    transition: var(--transition);
+}
+
+.btn-secondary:hover {
+    background-color: #f3f4f6;
+    border-color: #9ca3af;
+}
+
+/* Hinweise & Rechte-Panels */
+.anonymize-hint {
+    margin-top: 8px;
+    margin-bottom: 0;
+    background: #f0f9ff;
+    border: 1px solid #bae6fd;
+    border-radius: 6px;
+    padding: 8px 12px;
+    color: #0369a1;
+    font-size: 0.88rem;
+}
+
+.permission-panels {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+    gap: 12px;
+}
+
+.permission-panel {
+    border: 1px solid #d1d5db;
+    border-radius: 8px;
+    padding: 12px;
+    background: #ffffff;
+}
+
+.permission-panel h4 {
+    margin: 0 0 8px;
+    font-size: 0.95rem;
+    color: #1f2937;
+}
+
+.permission-check {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin: 6px 0;
+    color: #374151;
+    font-size: 0.9rem;
+    cursor: pointer;
+}
+
+/* Flash Nachrichten */
+.flash-container {
+    margin-bottom: 1.5rem;
+}
+
+.flash {
+    display: flex;
+    align-items: center;
+    padding: 0.9rem 1rem;
+    margin-bottom: 1rem;
+    border-radius: var(--border-radius);
+    animation: fadeIn 0.3s ease-in-out;
+}
+
+.flash-icon {
+    margin-right: 0.8rem;
+    font-size: 1rem;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    width: 22px;
+    height: 22px;
+    border-radius: 50%;
+    background-color: rgba(255, 255, 255, 0.4);
+}
+
+.flash.success {
+    background-color: #d1fae5;
+    color: #065f46;
+    border-left: 4px solid var(--csv-color);
+}
+
+.flash.error {
+    background-color: #fee2e2;
+    color: #991b1b;
+    border-left: 4px solid var(--error-color);
+}
+
+@keyframes fadeIn {
+    from { opacity: 0; transform: translateY(-8px); }
+    to { opacity: 1; transform: translateY(0); }
+}
+
+@media (max-width: 768px) {
+    .container {
+        padding: 0 0.75rem;
+        margin: 1rem auto;
+    }
+
+    .content {
+        padding: 1rem;
+    }
+
+    .form-card {
+        padding: 1rem;
+    }
+
+    .header-section h1 {
+        font-size: 1.8rem;
+    }
+}
+</style>
 {% endblock %}