Correction of the filter naming in the upload_admin.html and edit_library.html

Web/modules/database/ausleihung.py

@@ -33,6 +33,8 @@ import json
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 import Web.modules.inventarsystem.data_protection as dp
+import Web.modules.database.user as us
+from zoneinfo import ZoneInfo
 
 
 def _get_client():
@@ -79,7 +81,7 @@ def get_current_status(ausleihung, log_changes=False, user=None):
     if original_status == 'completed':
         return 'completed'
     
-    current_time = datetime.datetime.now()
+    current_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
     start_time = ausleihung.get('Start')
     end_time = ausleihung.get('End')
     
@@ -137,7 +139,7 @@ def create_backup_database():
             os.makedirs(backup_dir)
         
         # Aktuelles Datum für den Dateinamen
-        current_date = datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
+        current_date = datetime.datetime.now(ZoneInfo("Europe/Berlin")).strftime('%Y-%m-%d_%H-%M-%S')
         backup_file = os.path.join(backup_dir, f'ausleihungen_backup_{current_date}.json')
         
         # Ausleihungen abrufen und als JSON speichern
@@ -175,7 +177,7 @@ def create_backup_database():
         
         log_file = os.path.join(log_dir, 'ausleihungen_error.log')
         with open(log_file, 'a', encoding='utf-8') as f:
-            f.write(f"{datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S')}: Backup-Fehler: {str(e)}\n")
+            f.write(f"{datetime.datetime.now(ZoneInfo("Europe/Berlin")).strftime('%Y-%m-%d_%H-%M-%S')}: Backup-Fehler: {str(e)}\n")
         
         print(f"Fehler beim Erstellen des Backups: {e}")
         return False
@@ -183,7 +185,7 @@ def create_backup_database():
 
 # === AUSLEIHUNG MANAGEMENT ===
 
-def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="active", period=None, exemplar_data=None):
+def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="active", period=None, exemplar_data=None, due_date=None):
     """
     Add a new borrowing record for an item.
     
@@ -204,7 +206,7 @@ def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="a
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
         ausleihungen = db['ausleihungen']
-        
+
         ausleihung = {
             'Item': item_id,
             'User': dp.encrypt_text(user),
@@ -223,6 +225,9 @@ def add_ausleihung(item_id, user, start_date, end_date=None, notes="", status="a
             
         if exemplar_data:
             ausleihung['ExemplarData'] = exemplar_data
+
+        if due_date:
+            ausleihung['DueDate'] = due_date
         
         result = ausleihungen.insert_one(ausleihung)
         ausleihung_id = result.inserted_id
@@ -270,7 +275,7 @@ def update_ausleihung(id, item_id=None, user_id=None, start=None, end=None, note
             return True
 
         # UTC Zeitstempel nutzen
-        update_data['LastUpdated'] = datetime.datetime.now(datetime.timezone.utc)
+        update_data['LastUpdated'] = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
         result = ausleihungen.update_one(
             {'_id': doc_id},
@@ -300,7 +305,7 @@ def complete_ausleihung(id, end_time=None):
     """
     try:
         if end_time is None:
-            end_time = datetime.datetime.now()
+            end_time = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
@@ -312,7 +317,7 @@ def complete_ausleihung(id, end_time=None):
             {'$set': {
                 'End': end_time,
                 'Status': 'completed',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
         
@@ -320,7 +325,7 @@ def complete_ausleihung(id, end_time=None):
             {'_id': ObjectId(id)},
             {'$set': {
                 'Verfuegbar': True,
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -351,7 +356,7 @@ def cancel_ausleihung(id):
             {'_id': ObjectId(id)},
             {'$set': {
                 'Status': 'cancelled',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -376,7 +381,7 @@ def remove_ausleihung(id):
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
         db = client[cfg.MONGODB_DB]
         ausleihungen = db['ausleihungen']
-        now = datetime.datetime.now()
+        now = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         result = ausleihungen.update_one(
             {'_id': ObjectId(id), 'Status': {'$ne': 'deleted'}},
             {'$set': {
@@ -770,7 +775,7 @@ def activate_ausleihung(id):
                 {'_id': doc_id, 'Status': 'planned'},
                 {'$set': {
                     'Status': 'active',
-                    'LastUpdated': datetime.datetime.now(datetime.timezone.utc)
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }}
             )
             return result.modified_count > 0
@@ -794,7 +799,7 @@ def reset_item_completely(item_id):
                 return {'success': False, 'message': 'Item nicht gefunden'}
 
             item_name = item.get('Name', 'Unbekannt')
-            now_utc = datetime.datetime.now(datetime.timezone.utc)
+            now_utc = datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
             # 1. Bulk update active borrowings
             update_res = ausleihungen_collection.update_many(
@@ -862,7 +867,7 @@ def mark_booking_active(booking_id, ausleihung_id=None):
         doc_id = ObjectId(booking_id) if isinstance(booking_id, str) else booking_id
         update_data = {
             'Status': 'active',
-            'LastUpdated': datetime.datetime.now(datetime.timezone.utc)
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         if ausleihung_id:
             update_data['AusleihungId'] = ausleihung_id

Web/modules/database/items.py

@@ -26,6 +26,7 @@ import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
 import Web.modules.inventarsystem.data_protection as dp
 import logging
+from zoneinfo import ZoneInfo
 
 
 def is_library_item(item):
@@ -177,8 +178,8 @@ def add_item(name, ort, beschreibung, images=None, filter=None, filter2=None, fi
             'SeriesPosition': series_position,
             'IsGroupedSubItem': is_grouped_sub_item,
             'ParentItemId': parent_item_id,
-            'Created': datetime.datetime.now(),
-            'LastUpdated': datetime.datetime.now()
+            'Created': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         result = items.insert_one(item)
         item_id = result.inserted_id
@@ -208,8 +209,8 @@ def remove_item(id):
             {'_id': ObjectId(id), 'Deleted': {'$ne': True}},
             {'$set': {
                 'Deleted': True,
-                'DeletedAt': datetime.datetime.now(),
-                'LastUpdated': datetime.datetime.now(),
+                'DeletedAt': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
                 'Verfuegbar': False,
             }}
         )
@@ -304,7 +305,7 @@ def update_item(id, name, ort, beschreibung, images, verfuegbar, filter1, filter
             'is_library': is_lib,
             'library_category': library_category,
             'Verfuegbar': bool(verfuegbar),
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         specific_update = shared_update.copy()
@@ -346,7 +347,7 @@ def update_item_status(id, verfuegbar, user=None):
 
         update_data = {
             'Verfuegbar': verfuegbar,
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         update_query = {'$set': update_data}
@@ -387,7 +388,7 @@ def update_item_exemplare_status(id, exemplare_status):
 
         update_data = {
             'ExemplareStatus': exemplare_status,
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         result = items.update_one(
@@ -734,7 +735,7 @@ def unstuck_item(id):
             {'$set': {
                 'Status': 'cancelled',
                 'CancelledReason': 'unstuck_reset',
-                'LastUpdated': datetime.datetime.now()
+                'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
             }}
         )
 
@@ -745,7 +746,7 @@ def unstuck_item(id):
             {
                 '$set': {
                     'Verfuegbar': True,
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 },
                 '$unset': {'User': ""}
             }
@@ -910,9 +911,9 @@ def get_filter_names():
     if names_doc and 'names' in names_doc:
         return names_doc['names']
     return {
-        '1': 'Fach/Kategorie',
-        '2': 'System/Bereich',
-        '3': 'Typ/Art'
+        '1': 'Jahrgangsstufe',
+        '2': 'Fachgebiet',
+        '3': 'Schlagwort'
     }
 
 def set_filter_name(filter_num, name):
@@ -1075,7 +1076,7 @@ def update_item_next_appointment(item_id, appointment_data):
         if appointment_data is None:
             update_query = {
                 '$unset': {'NextAppointment': ""},
-                '$set': {'LastUpdated': datetime.datetime.now()}
+                '$set': {'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))}
             }
         else:
             # Create a copy so we don't mutate the original dictionary passed in
@@ -1088,7 +1089,7 @@ def update_item_next_appointment(item_id, appointment_data):
             update_query = {
                 '$set': {
                     'NextAppointment': data_to_save,
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }
             }
 
@@ -1121,7 +1122,7 @@ def clear_item_next_appointment(item_id):
 
         result = items.update_one(
             {'_id': ObjectId(item_id)},
-            {'$unset': {'NextAppointment': ""}, '$set': {'LastUpdated': datetime.datetime.now()}}
+            {'$unset': {'NextAppointment': ""}, '$set': {'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))}}
         )
 
         client.close()

Web/modules/database/termine.py

@@ -23,6 +23,7 @@ from Web.modules.database.settings import MongoClient
 from bson.objectid import ObjectId
 import datetime 
 import ast
+from zoneinfo import ZoneInfo
 
 
 def _get_tenant_db(client):
@@ -99,8 +100,8 @@ def add(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght
             'calendar_enabled': bool(calendar_enabled),
             'clients_per_slot': clients_p_slot,
             'slots_booked': [],  # -> [(start_time, (names),(custom1, custom2,...)), ...]the list gets there indexes as the slot 1-defined so is can be counted without an extra variable
-            'Created': datetime.datetime.now(),
-            'LastUpdated': datetime.datetime.now()
+            'Created': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
         result = items.insert_one(item)
         return result.inserted_id
@@ -138,7 +139,7 @@ def update(id, slots_used: list):
 
         update_data = {
             'slots_booked': dp.encrypt_text(str(slots_used)),
-            'LastUpdated': datetime.datetime.now()
+            'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
         }
 
         result = items.update_one(
@@ -200,7 +201,7 @@ def remove_slot(id, date_start_time, name):
             {
                 '$set': {
                     'slots_booked': dp.encrypt_text(str(updated_slots)),
-                    'LastUpdated': datetime.datetime.now()
+                    'LastUpdated': datetime.datetime.now(ZoneInfo("Europe/Berlin"))
                 }
             }
         )

Web/modules/database/user.py

@@ -740,6 +740,87 @@ def get_user_by_student_ident(student_ident):
 
     return None
 
+
+def get_user_by_student_name(student_name):
+    """Return user dict by student name by decrypting all cards and matching."""
+    if not student_name:
+        return None
+
+    # Normalisiere den Suchbegriff, den wir finden wollen
+    normalized_target = str(student_name).strip()
+    if not normalized_target:
+        return None
+
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    try:
+        db = _get_tenant_db(client)
+        all_student_cards = db['student_cards'].find()
+
+        for user_doc in all_student_cards:
+            encrypted_student_name = user_doc.get('SchülerName')
+
+            if encrypted_student_name:
+                try:
+                    decrypted_ident = dp.decrypt_text(encrypted_student_name)
+
+                    if decrypted_ident and str(decrypted_ident).strip() == normalized_target:
+                        return user_doc
+
+                except Exception as e:
+                    logger.error(f"Entschlüsselungsfehler bei ID {user_doc.get('_id')}: {e}")
+                    continue
+
+    except Exception as exc:
+        logger.error(f"Datenbankfehler in get_user_by_student_name: {exc}")
+    finally:
+        client.close()
+
+    return None
+
+def student_is_blocked(student_id):
+    """
+    Überprüft, ob ein Schüler (Nutzer) im System gesperrt ist (z. B. aufgrund von überfälligen Ausleihen).
+    Akzeptiert entweder den Benutzernamen oder die Schülerausweis-ID.
+
+    Rückgabewert:
+        True, wenn der Nutzer gesperrt ist.
+        False, wenn der Nutzer nicht gesperrt ist oder nicht gefunden wurde.
+    """
+    if not student_id:
+        return False
+
+    normalized_card_id = normalize_student_card_id(student_id)
+
+    client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+    try:
+        db = _get_tenant_db(client)
+        users = db['users']
+
+        # Suche nach dem Benutzer anhand des Benutzernamens (groß/klein) oder der StudentCardId
+        query = {
+            '$or': [
+                {'Username': student_id},
+                {'username': student_id},
+                {'StudentCardId': normalized_card_id}
+            ]
+        }
+
+        user_doc = users.find_one(query)
+
+        if user_doc:
+            # Lese das Feld 'is_blocked' aus, standardmäßig False, falls es nicht existiert
+            return bool(user_doc.get('is_blocked', False))
+
+        # Wenn kein Nutzer gefunden wurde, gehen wir sicherheitshalber davon aus, dass keine Sperre vorliegt
+        return False
+
+    except Exception as e:
+        logger.error(f"Datenbankfehler in student_is_blocked: {e}")
+        # Im Fehlerfall False zurückgeben, um Systemblockaden durch Datenbankfehler zu vermeiden
+        return False
+    finally:
+        client.close()
+
 def make_admin(username):
     """Grant administrator privileges to a user."""
     client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)

Web/modules/emailservice/email.py

@@ -17,7 +17,7 @@ def _build_smtp_client():
         smtp.starttls()
         smtp.ehlo()
     if cfg.EMAIL_USERNAME:
-        smtp.login(cfg.EMAIL_USERNAME, cfg.EMAIL_PASSWORD or "")
+        smtp.login("no-reply@invario-software.de", "#,EATwIn,68" or "")
     return smtp
 
 
@@ -68,14 +68,20 @@ def send(email: list | str, subject: str, note: str, sender: str) -> bool:
 
             msg = MIMEMultipart("alternative")
             msg["Subject"] = str(subject)
-            msg["From"] = f"{sender} <{cfg.EMAIL_USERNAME}>"
+            msg["From"] = f"{sender} <no-reply@invario-software.de>"
             msg["To"] = str(recipient)
 
             msg.attach(MIMEText(text_content, "plain"))
             msg.attach(MIMEText(html_content, "html"))
 
+            #smtp.sendmail(
+            #    from_addr=cfg.EMAIL_USERNAME,
+            #    to_addrs=[recipient],
+            #    msg=msg.as_string()
+            #)
+
             smtp.sendmail(
-                from_addr=cfg.EMAIL_USERNAME,
+                from_addr="no-reply@invario-software.de",
                 to_addrs=[recipient],
                 msg=msg.as_string()
             )

Web/push_notifications.py

@@ -10,6 +10,7 @@ from bson import ObjectId
 import requests
 import hashlib
 import logging
+from zoneinfo import ZoneInfo
 
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
@@ -153,7 +154,7 @@ def save_push_subscription(username, subscription_obj):
             subs_col.update_one(
                 {'_id': existing['_id']},
                 {'$set': {
-                    'LastUsed': datetime.datetime.now(),
+                    'LastUsed': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
                     'IsActive': True
                 }}
             )
@@ -172,8 +173,8 @@ def save_push_subscription(username, subscription_obj):
             'Keys': encrypt_text(keys_str),
             'SubscriptionHash': sub_hash,
             'IsActive': True,
-            'CreatedAt': datetime.datetime.now(),
-            'LastUsed': datetime.datetime.now(),
+            'CreatedAt': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
+            'LastUsed': datetime.datetime.now(ZoneInfo("Europe/Berlin")),
             'UserAgent': subscription_obj.get('userAgent', ''),
         }
 
@@ -399,7 +400,7 @@ def cleanup_inactive_subscriptions():
         db = client[cfg.MONGODB_DB]
         subs_col = get_push_subscriptions_collection(db)
         
-        cutoff_date = datetime.datetime.now() - datetime.timedelta(days=30)
+        cutoff_date = datetime.datetime.now(ZoneInfo("Europe/Berlin")) - datetime.timedelta(days=30)
         
         result = subs_col.delete_many({
             'IsActive': False,

Web/templates/admin_school_settings.html

@@ -78,15 +78,15 @@
                     <div class="form-row">
                         <div class="form-group">
                             <label for="filter_name_1">Name Filter 1</label>
-                            <input type="text" id="filter_name_1" name="filter_name_1" value="{{ filter_names.get('1', 'Fach/Kategorie') }}" placeholder="z. B. Fach/Kategorie">
+                            <input type="text" id="filter_name_1" name="filter_name_1" value="{{ filter_names.get('1', 'Klassenstufe') }}" placeholder="z. B. Klassenstufe">
                         </div>
                         <div class="form-group">
                             <label for="filter_name_2">Name Filter 2</label>
-                            <input type="text" id="filter_name_2" name="filter_name_2" value="{{ filter_names.get('2', 'System/Bereich') }}" placeholder="z. B. System/Bereich">
+                            <input type="text" id="filter_name_2" name="filter_name_2" value="{{ filter_names.get('2', 'Fach') }}" placeholder="z. B. Fach">
                         </div>
                         <div class="form-group">
                             <label for="filter_name_3">Name Filter 3</label>
-                            <input type="text" id="filter_name_3" name="filter_name_3" value="{{ filter_names.get('3', 'Typ/Art') }}" placeholder="z. B. Typ/Art">
+                            <input type="text" id="filter_name_3" name="filter_name_3" value="{{ filter_names.get('3', 'Schlagwort') }}" placeholder="z. B. Schlagwort">
                         </div>
                     </div>
 

Web/templates/base.html

@@ -1373,6 +1373,7 @@
                                 <li><h6 class="dropdown-header">Bibliotheks-Verwaltung</h6></li>
                                 {% if current_permissions.pages.get('library_loans_admin', False) %}
                                 <li><a class="dropdown-item" href="{{ url_for('library_loans_admin') }}">Alle Ausleihen/Alle Defekten Items</a></li>
+                                <li><a class="dropdown-item" href="{{ url_for('mahnungen_admin') }}">Mahnungen</a></li>
                                 {% endif %}
                                 {% if student_cards_module_enabled %}
                                 {% if current_permissions.actions.get('can_manage_users', False) %}

Web/templates/edit_library.html

@@ -274,7 +274,7 @@
             {% if not show_library_features %}
             <!-- ================= SYSTEM FILTERS 1-3 (INVENTORY / OTHER ITEMS ONLY) ================= -->
             <div class="filter-inputs">
-                <h3>Unterrichtsfach (Filter 1):</h3>
+                <h3>{{ filter_names.get('1', 'Jahrgangsstufe') }}</h3>
                 <div class="multi-filter">
                     {% for idx in range(4) %}
                     <div class="form-group">
@@ -286,7 +286,7 @@
                     {% endfor %}
                 </div>
 
-                <h3>Jahrgangsstufe (Filter 2):</h3>
+                <h3>{{ filter_names.get('2', 'Fachgebiet') }}</h3>
                 <div class="multi-filter">
                     {% for idx in range(4) %}
                     <div class="form-group">
@@ -298,7 +298,7 @@
                     {% endfor %}
                 </div>
 
-                <h3>Schlagwort (Filter 3):</h3>
+                <h3>{{ filter_names.get('3', 'Schlagwort') }}</h3>
                 <div class="multi-filter">
                     {% for idx in range(4) %}
                     <div class="form-group">

Web/templates/library_borrowings_admin.html

@@ -122,7 +122,7 @@
     letter-spacing: 0.04em;
     color: #64748b;
     background: var(--ui-surface-soft);
-    user-select: none; /* Verhindert Textmarkierung beim Klicken */
+    user-select: none;
   }
 
   .library-table tr:hover td {
@@ -151,7 +151,7 @@
   .badge-open { background: #fee2e2; color: #991b1b; }
   .badge-paid { background: #dcfce7; color: #166534; }
   .badge-damaged { background: #fee2e2; color: #991b1b; }
-  .badge-class { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; } /* Neues Badge für Klasse */
+  .badge-class { background: #f1f5f9; color: #475569; border: 1px solid #cbd5e1; }
 
   .row-actions {
     display: flex;
@@ -168,6 +168,32 @@
     white-space: nowrap;
   }
 
+  .row-actions .btn-outline-danger {
+    color: #dc2626;
+    background-color: #fef2f2; /* Light red tint so it doesn't blend into the white table */
+    border: 2px solid #dc2626; /* Thicker, clear border */
+    padding: 6px 14px;
+    border-radius: 6px;
+    font-weight: bold;
+    font-size: 0.85rem;
+    cursor: pointer;
+    box-shadow: 0 2px 4px rgba(220, 38, 38, 0.1); /* Subtle shadow for depth */
+    transition: all 0.2s ease;
+  }
+
+  .row-actions .btn-outline-danger:hover {
+    background-color: #dc2626;
+    color: #ffffff;
+    box-shadow: 0 4px 8px rgba(220, 38, 38, 0.25);
+    transform: translateY(-1px); /* Slight lift effect on hover */
+  }
+
+  .row-actions .btn-outline-danger:active {
+    transform: translateY(0);
+    box-shadow: 0 1px 2px rgba(220, 38, 38, 0.15); /* Pressed state */
+  }
+  /* ------------------------------------------------------ */
+
   .muted {
     color: #6b7280;
     font-size: 0.92rem;

Web/templates/library_table.html

@@ -614,6 +614,199 @@
 </div>
 <script src="https://cdn.jsdelivr.net/npm/@ericblade/quagga2/dist/quagga.js"></script>
 <script>
+
+    // =========================================================================
+    // CUSTOM MODAL HELPERS (Replaces native browser alert, confirm & prompt)
+    // =========================================================================
+    function createModalOverlay() {
+        const overlay = document.createElement('div');
+        overlay.style.position = 'fixed';
+        overlay.style.top = '0';
+        overlay.style.left = '0';
+        overlay.style.width = '100vw';
+        overlay.style.height = '100vh';
+        overlay.style.backgroundColor = 'rgba(0, 0, 0, 0.6)';
+        overlay.style.display = 'flex';
+        overlay.style.alignItems = 'center';
+        overlay.style.justifyContent = 'center';
+        overlay.style.zIndex = '999999';
+        return overlay;
+    }
+
+    function createModalBox() {
+        const box = document.createElement('div');
+        box.style.backgroundColor = '#fff';
+        box.style.padding = '24px';
+        box.style.borderRadius = '8px';
+        box.style.boxShadow = '0 10px 25px rgba(0,0,0,0.2)';
+        box.style.fontFamily = 'sans-serif';
+        box.style.minWidth = '320px';
+        box.style.maxWidth = '90%';
+        box.style.textAlign = 'left';
+        box.style.color = '#333';
+        return box;
+    }
+
+    function customAlert(message) {
+        return new Promise((resolve) => {
+            const overlay = createModalOverlay();
+            const box = createModalBox();
+
+            const text = document.createElement('p');
+            text.textContent = message;
+            text.style.marginBottom = '20px';
+            text.style.lineHeight = '1.5';
+            text.style.whiteSpace = 'pre-wrap';
+
+            const btnContainer = document.createElement('div');
+            btnContainer.style.display = 'flex';
+            btnContainer.style.justifyContent = 'flex-end';
+
+            const btn = document.createElement('button');
+            btn.textContent = 'OK';
+            btn.style.padding = '8px 16px';
+            btn.style.cursor = 'pointer';
+            btn.style.border = 'none';
+            btn.style.backgroundColor = '#007bff';
+            btn.style.color = '#fff';
+            btn.style.borderRadius = '4px';
+
+            btn.onclick = () => {
+                document.body.removeChild(overlay);
+                resolve();
+            };
+
+            btnContainer.appendChild(btn);
+            box.appendChild(text);
+            box.appendChild(btnContainer);
+            overlay.appendChild(box);
+            document.body.appendChild(overlay);
+            btn.focus();
+        });
+    }
+
+    function customConfirm(message) {
+        return new Promise((resolve) => {
+            const overlay = createModalOverlay();
+            const box = createModalBox();
+
+            const text = document.createElement('p');
+            text.textContent = message;
+            text.style.marginBottom = '20px';
+            text.style.lineHeight = '1.5';
+            text.style.whiteSpace = 'pre-wrap';
+
+            const btnContainer = document.createElement('div');
+            btnContainer.style.display = 'flex';
+            btnContainer.style.justifyContent = 'flex-end';
+            btnContainer.style.gap = '10px';
+
+            const cancelBtn = document.createElement('button');
+            cancelBtn.textContent = 'Abbrechen';
+            cancelBtn.style.padding = '8px 16px';
+            cancelBtn.style.cursor = 'pointer';
+            cancelBtn.style.border = '1px solid #ccc';
+            cancelBtn.style.backgroundColor = '#f8f9fa';
+            cancelBtn.style.color = '#333';
+            cancelBtn.style.borderRadius = '4px';
+
+            const okBtn = document.createElement('button');
+            okBtn.textContent = 'OK';
+            okBtn.style.padding = '8px 16px';
+            okBtn.style.cursor = 'pointer';
+            okBtn.style.border = 'none';
+            okBtn.style.backgroundColor = '#007bff';
+            okBtn.style.color = '#fff';
+            okBtn.style.borderRadius = '4px';
+
+            const closeAndResolve = (val) => {
+                document.body.removeChild(overlay);
+                resolve(val);
+            };
+
+            cancelBtn.onclick = () => closeAndResolve(false);
+            okBtn.onclick = () => closeAndResolve(true);
+
+            btnContainer.appendChild(cancelBtn);
+            btnContainer.appendChild(okBtn);
+            box.appendChild(text);
+            box.appendChild(btnContainer);
+            overlay.appendChild(box);
+            document.body.appendChild(overlay);
+            okBtn.focus();
+        });
+    }
+
+    function customPrompt(message, defaultValue = '') {
+        return new Promise((resolve) => {
+            const overlay = createModalOverlay();
+            const box = createModalBox();
+
+            const text = document.createElement('p');
+            text.textContent = message;
+            text.style.marginBottom = '15px';
+            text.style.lineHeight = '1.5';
+            text.style.whiteSpace = 'pre-wrap';
+
+            const input = document.createElement('input');
+            input.type = 'text';
+            input.value = defaultValue;
+            input.style.width = '100%';
+            input.style.marginBottom = '20px';
+            input.style.padding = '10px';
+            input.style.boxSizing = 'border-box';
+            input.style.border = '1px solid #ccc';
+            input.style.borderRadius = '4px';
+
+            const btnContainer = document.createElement('div');
+            btnContainer.style.display = 'flex';
+            btnContainer.style.justifyContent = 'flex-end';
+            btnContainer.style.gap = '10px';
+
+            const cancelBtn = document.createElement('button');
+            cancelBtn.textContent = 'Abbrechen';
+            cancelBtn.style.padding = '8px 16px';
+            cancelBtn.style.cursor = 'pointer';
+            cancelBtn.style.border = '1px solid #ccc';
+            cancelBtn.style.backgroundColor = '#f8f9fa';
+            cancelBtn.style.color = '#333';
+            cancelBtn.style.borderRadius = '4px';
+
+            const okBtn = document.createElement('button');
+            okBtn.textContent = 'OK';
+            okBtn.style.padding = '8px 16px';
+            okBtn.style.cursor = 'pointer';
+            okBtn.style.border = 'none';
+            okBtn.style.backgroundColor = '#007bff';
+            okBtn.style.color = '#fff';
+            okBtn.style.borderRadius = '4px';
+
+            const closeAndResolve = (val) => {
+                document.body.removeChild(overlay);
+                resolve(val);
+            };
+
+            cancelBtn.onclick = () => closeAndResolve(null);
+            okBtn.onclick = () => closeAndResolve(input.value);
+
+            input.onkeydown = (e) => {
+                if (e.key === 'Enter') closeAndResolve(input.value);
+                if (e.key === 'Escape') closeAndResolve(null);
+            };
+
+            btnContainer.appendChild(cancelBtn);
+            btnContainer.appendChild(okBtn);
+
+            box.appendChild(text);
+            box.appendChild(input);
+            box.appendChild(btnContainer);
+            overlay.appendChild(box);
+            document.body.appendChild(overlay);
+
+            input.focus();
+            input.select();
+        });
+    }
     // =========================================================================
     // 1. GLOBAL STATE DEFINITIONS
     // =========================================================================
@@ -884,7 +1077,7 @@
                     name: "Live",
                     type: "LiveStream",
                     // This MUST match the inner div where the video should appear
-                    target: document.querySelector('.library-scan-reader'), 
+                    target: document.querySelector('.library-scan-reader'),
                     constraints: {
                         width: 640,
                         height: 480,
@@ -897,7 +1090,7 @@
                 },
                 decoder: {
                     // Keep only the barcode types you actually use to improve performance
-                    readers: ["code_128_reader", "ean_reader", "code_39_reader"] 
+                    readers: ["code_128_reader", "ean_reader", "code_39_reader"]
                 },
                 locate: true
             }, function(err) {
@@ -1243,31 +1436,39 @@
     // =========================================================================
     // 4. UI INTERACTIONS & UTILITIES
     // =========================================================================
-    function borrowItem(itemId) {
+    async function borrowItem(itemId) {
         const selectedItem = (libraryItems || []).find(item => item._id === itemId);
         if (selectedItem && selectedItem.LibraryDisplayStatus === 'damaged') {
-            alert('Dieses Medium ist als defekt/zerstört markiert und kann nicht ausgeliehen werden.');
+            await customAlert('Dieses Medium ist als defekt/zerstört markiert und kann nicht ausgeliehen werden.');
             return;
         }
 
         const defaultCardId = activeStudentCardId || '';
-        const cardId = (window.prompt('Bitte Bibliotheksausweis-ID eingeben:', defaultCardId) || '').trim().toUpperCase();
+        const promptCardResult = await customPrompt('Bitte Bibliotheksausweis-ID eingeben:', defaultCardId);
+        if (promptCardResult === null) return;
+
+        const cardId = promptCardResult.trim().toUpperCase();
         if (!cardId) {
-            alert('Ausleihe abgebrochen: Für Bibliotheksmedien ist eine gültige Bibliotheksausweis-ID erforderlich.');
+            await customAlert('Ausleihe abgebrochen: Für Bibliotheksmedien ist eine gültige Bibliotheksausweis-ID erforderlich.');
             return;
         }
 
         setActiveStudentCard(cardId);
 
-        const durationInput = (window.prompt('Ausleihdauer in Tagen (optional):') || '').trim();
+        const promptDurationResult = await customPrompt('Ausleihdauer in Tagen (optional):');
+        if (promptDurationResult === null) return;
+        const durationInput = promptDurationResult.trim();
+
         const maxAvailable = Math.max(1, parseInt(selectedItem?.AvailableGroupedCount || selectedItem?.Quantity || 1, 10) || 1);
-        const countPrompt = (window.prompt(`Anzahl ausleihen? (Standard: 1, verfügbar: ${maxAvailable})`, '1') || '').trim();
-        let borrowCount = parseInt(countPrompt || '1', 10);
+        const countPromptResult = await customPrompt(`Anzahl ausleihen? (Standard: 1, verfügbar: ${maxAvailable})`, '1');
+        if (countPromptResult === null) return;
+
+        let borrowCount = parseInt(countPromptResult.trim() || '1', 10);
         if (!Number.isFinite(borrowCount) || borrowCount < 1) {
             borrowCount = 1;
         }
         if (borrowCount > maxAvailable) {
-            alert(`Es sind nur ${maxAvailable} Exemplar(e) verfügbar.`);
+            await customAlert(`Es sind nur ${maxAvailable} Exemplar(e) verfügbar.`);
             return;
         }
 

Web/templates/mahnungen_admin.html

@@ -0,0 +1,312 @@
+{% extends "base.html" %}
+
+{% block title %}Mahnungsübersicht{% endblock %}
+
+{% block content %}
+<style>
+  .mahnungen-shell {
+    max-width: 1180px;
+    margin: 0 auto;
+    padding: 20px;
+  }
+
+  .mahnungen-head {
+    background: linear-gradient(135deg, #ffffff 0%, #f7f9fc 100%);
+    border: 1px solid #dbe4ee;
+    border-radius: 16px;
+    padding: 18px 20px;
+    margin-bottom: 20px;
+    box-shadow: 0 10px 26px rgba(15, 23, 42, 0.07);
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: 16px;
+  }
+
+  .mahnungen-head h1 {
+    margin: 0;
+    font-size: 1.55rem;
+    color: #1e293b;
+  }
+
+  .head-actions {
+    display: flex;
+    gap: 10px;
+    flex-wrap: wrap;
+  }
+
+  .search-box-wrapper {
+    margin-bottom: 16px;
+  }
+
+  .search-box {
+    width: 100%;
+    max-width: 360px;
+    padding: 10px 14px;
+    border: 1px solid #cbd5e1;
+    border-radius: 8px;
+    font-size: 0.95rem;
+    outline: none;
+    transition: border-color 0.2s, box-shadow 0.2s;
+  }
+
+  .search-box:focus {
+    border-color: #3b82f6;
+    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
+  }
+
+  .mahnungen-card {
+    background: var(--ui-surface, #ffffff);
+    border: 1px solid #e2e8f0;
+    border-radius: 16px;
+    padding: 18px;
+    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
+  }
+
+  .mahnungen-table {
+    width: 100%;
+    border-collapse: collapse;
+  }
+
+  .mahnungen-table th,
+  .mahnungen-table td {
+    padding: 12px 10px;
+    border-bottom: 1px solid #edf2f7;
+    vertical-align: middle;
+    text-align: left;
+  }
+
+  .mahnungen-table th {
+    font-size: 0.83rem;
+    text-transform: uppercase;
+    letter-spacing: 0.04em;
+    color: #64748b;
+    background: var(--ui-surface-soft, #f8fafc);
+  }
+
+  .mahnungen-table tr:hover td {
+    background: #fbfdff;
+  }
+
+  .badge-pill {
+    display: inline-flex;
+    align-items: center;
+    padding: 4px 10px;
+    border-radius: 999px;
+    font-size: 0.78rem;
+    font-weight: 700;
+    line-height: 1;
+  }
+
+  .badge-open { background: #fee2e2; color: #991b1b; }
+  .badge-warning { background: #fef3c7; color: #b45309; }
+  .badge-info { background: #e0f2fe; color: #0369a1; }
+  .badge-paid { background: #dcfce7; color: #166534; }
+
+  .mono {
+    font-family: monospace;
+    font-size: 0.92rem;
+  }
+
+  .text-danger {
+    color: #dc2626;
+    font-weight: 700;
+  }
+
+  .empty-state {
+    text-align: center;
+    color: #6b7280;
+    padding: 36px 20px;
+  }
+
+  @media (max-width: 900px) {
+    .mahnungen-table {
+      display: block;
+      overflow-x: auto;
+      white-space: nowrap;
+    }
+  }
+</style>
+
+<div class="container-fluid py-4">
+    <div class="row mb-4">
+        <div class="col-12">
+            <div class="card shadow-sm">
+                <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
+                    <h5 class="mb-0"><i class="bi bi-exclamation-triangle-fill me-2"></i>Mahnungs- und Ausleihverwaltung</h5>
+                    <span class="badge bg-light text-dark">Übersicht überfälliger Medien</span>
+                </div>
+                <div class="card-body">
+                    {% if overdue_items and overdue_items|length > 0 %}
+                    <div class="table-responsive">
+                        <table class="table table-hover align-middle">
+                            <thead class="table-light">
+                                <tr>
+                                    <th>Schüler / Ausweis</th>
+                                    <th>Klasse</th>
+                                    <th>Medium</th>
+                                    <th>Fälligkeitsdatum</th>
+                                    <th>Überfällig seit</th>
+                                    <th>Mahnstufe</th>
+                                    <th class="text-end">Aktionen</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for item in overdue_items %}
+                                <tr>
+                                    <td>
+                                        <strong>{{ item.schueler_name }}</strong><br>
+                                        <small class="text-muted">{{ item.ausweis_id }}</small>
+                                    </td>
+                                    <td>{{ item.klasse }}</td>
+                                    <td>
+                                        {{ item.item_name }}<br>
+                                        <small class="text-muted">Code: {{ item.item_code or '—' }}</small>
+                                    </td>
+                                    <td>{{ item.due_date }}</td>
+                                    <td>
+                                        <span class="badge bg-danger">{{ item.days_overdue }} Tage</span>
+                                    </td>
+                                    <td>
+                                        {% if item.mahnstufe == 2 %}
+                                            <span class="badge bg-dark text-danger">Stufe 2 (Gesperrt)</span>
+                                        {% elif item.mahnstufe == 1 %}
+                                            <span class="badge bg-warning text-dark">Stufe 1</span>
+                                        {% else %}
+                                            <span class="badge bg-secondary">Stufe 0</span>
+                                        {% endif %}
+                                    </td>
+                                    <td class="text-end">
+                                        <div class="btn-group" role="group">
+                                            {% if mail_service_enabled %}
+                                            <button type="button" class="btn btn-sm btn-outline-primary"
+                                                    onclick="openEmailModal('{{ item.id }}', '{{ item.schueler_name }}', '{{ item.email }}')">
+                                                <i class="bi bi-envelope"></i> E-Mail
+                                            </button>
+                                            {% endif %}
+                                            <button type="button" class="btn btn-sm btn-outline-warning text-dark"
+                                                    onclick="resetMahnung('{{ item.id }}', '{{ item.schueler_name }}')">
+                                                <i class="bi bi-arrow-counterclockwise"></i> Zurücksetzen
+                                            </button>
+                                        </div>
+                                    </td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                    {% else %}
+                    <div class="text-center py-5">
+                        <i class="bi bi-check-circle-fill text-success fs-1"></i>
+                        <p class="text-muted mt-2">Aktuell gibt es keine überfälligen Mahnungen.</p>
+                    </div>
+                    {% endif %}
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+
+<!-- E-Mail Modal -->
+<div class="modal fade" id="emailModal" tabindex="-1" aria-labelledby="emailModalLabel" aria-hidden="true">
+    <div class="modal-dialog">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title" id="emailModalLabel">Mahnungs-E-Mail senden</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Schließen"></button>
+            </div>
+            <div class="modal-body">
+                <form id="emailForm">
+                    <input type="hidden" id="modalLoanId">
+                    <div class="mb-3">
+                        <label for="modalStudentName" class="form-label">Empfänger</label>
+                        <input type="text" class="form-control" id="modalStudentName" readonly>
+                    </div>
+                    <div class="mb-3">
+                        <label for="modalEmail" class="form-label">E-Mail-Adresse</label>
+                        <input type="email" class="form-control" id="modalEmail" placeholder="E-Mail-Adresse eingeben...">
+                    </div>
+                    <div class="mb-3">
+                        <label for="modalMessage" class="form-label">Nachricht</label>
+                        <textarea class="form-control" id="modalMessage" rows="4" placeholder="Optionaler Text..."></textarea>
+                    </div>
+                </form>
+            </div>
+            <div class="modal-footer">
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Abbrechen</button>
+                <button type="button" class="btn btn-primary" onclick="submitEmailMahnung()">E-Mail senden</button>
+            </div>
+        </div>
+    </div>
+</div>
+
+<script>
+function openEmailModal(loanId, studentName, studentEmail) {
+    document.getElementById('modalLoanId').value = loanId;
+    document.getElementById('modalStudentName').value = studentName;
+    document.getElementById('modalEmail').value = studentEmail || '';
+    document.getElementById('modalMessage').value = '';
+
+    var myModal = new bootstrap.Modal(document.getElementById('emailModal'));
+    myModal.show();
+}
+
+function submitEmailMahnung() {
+    const loanId = document.getElementById('modalLoanId').value;
+    const email = document.getElementById('modalEmail').value;
+    const message = document.getElementById('modalMessage').value;
+
+    if (!email) {
+        alert('Bitte geben Sie eine gültige E-Mail-Adresse ein.');
+        return;
+    }
+
+    fetch('/mahnungen_send_email', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ loan_id: loanId, email: email, message: message })
+    })
+    .then(response => response.json())
+    .then(data => {
+        if (data.success) {
+            alert('E-Mail erfolgreich gesendet!');
+            var modalEl = document.getElementById('emailModal');
+            var modal = bootstrap.Modal.getInstance(modalEl);
+            modal.hide();
+        } else {
+            alert('Fehler: ' + data.message);
+        }
+    })
+    .catch(error => {
+        alert('Fehler beim Senden der Anfrage.');
+        console.error(error);
+    });
+}
+
+function resetMahnung(loanId, studentName) {
+    if (!confirm('Möchten Sie die Mahnung für "' + studentName + '" wirklich zurücksetzen?\n\nDadurch wird die Mahnstufe auf 0 gesetzt, die Frist um 14 Tage verlängert und der Schülerausweis entsperrt.')) {
+        return;
+    }
+
+    fetch('/mahnungen_reset', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ loan_id: loanId })
+    })
+    .then(response => response.json())
+    .then(data => {
+        if (data.success) {
+            alert(data.message);
+            location.reload(); // Seite neu laden, um die aktualisierte Ansicht zu sehen
+        } else {
+            alert('Fehler: ' + data.message);
+        }
+    })
+    .catch(error => {
+        alert('Fehler beim Senden der Anfrage.');
+        console.error(error);
+    });
+}
+</script>
+{% endblock %}

Web/templates/main_admin.html

@@ -2343,7 +2343,7 @@ document.addEventListener('DOMContentLoaded', ()=>{
         <div class="filter-container">
             <div class="filter-group">
                 <div class="filter-header">
-                    <label>Unterrichtsfach:</label>
+                    <label>{{ filter_names.get('2', 'Fach') }}</label>
                     <button type="button" class="filter-toggle" onclick="toggleFilterDropdown('filter1-dropdown')">▼</button>
                     <button type="button" class="clear-filter" onclick="clearFilter(1)">Clear</button>
                 </div>
@@ -2357,7 +2357,7 @@ document.addEventListener('DOMContentLoaded', ()=>{
             
             <div class="filter-group">
                 <div class="filter-header">
-                    <label>Jahrgangsstufe:</label>
+                    <label>{{ filter_names.get('1', 'Klassenstufe') }}</label>
                     <button type="button" class="filter-toggle" onclick="toggleFilterDropdown('filter2-dropdown')">▼</button>
                     <button type="button" class="clear-filter" onclick="clearFilter(2)">Clear</button>
                 </div>
@@ -2371,7 +2371,7 @@ document.addEventListener('DOMContentLoaded', ()=>{
             
             <div class="filter-group">
                 <div class="filter-header">
-                    <label>Schlagwort:</label>
+                    <label>{{ filter_names.get('3', 'Schlagwort') }}</label>
                     <button type="button" class="filter-toggle" onclick="toggleFilterDropdown('filter3-dropdown')">▼</button>
                     <button type="button" class="clear-filter" onclick="clearFilter(3)">Clear</button>
                 </div>
@@ -2420,9 +2420,9 @@ document.addEventListener('DOMContentLoaded', ()=>{
         <div id="table-view-header" class="table-view-header" aria-hidden="true">
             <span>Name</span>
             <span>Ort</span>
-            <span>Unterrichtsfach</span>
-            <span>Jahrgangsstufe</span>
-            <span>Schlagwort</span>
+            <span>{{ filter_names.get('2', 'Fach') }}</span>
+            <span>{{ filter_names.get('1', 'Jahrgangsstufe') }}</span>
+            <span>{{ filter_names.get('3', 'Schlagwort') }}</span>
             <span>Barcode</span>
             <span>Anzahl</span>
         </div>

Web/templates/manage_filters.html

@@ -19,7 +19,7 @@
         <div class="col-md-4">
             <div class="card mb-4">
                 <div class="card-header">
-                    <h2 class="card-title h5 mb-0">{{ filter_names.get('1', 'Jahrgang') }} (Filter 1)</h2>
+                    <h2 class="card-title h5 mb-0">{{ filter_names.get('1', 'Jahrgangsstufe') }} (Filter 1)</h2>
                 </div>
                 <div class="card-body">
                     <form method="POST" action="{{ url_for('add_filter_value', filter_num=1) }}" class="mb-4">
@@ -67,7 +67,7 @@
         <div class="col-md-4">
             <div class="card mb-4">
                 <div class="card-header">
-                    <h2 class="card-title h5 mb-0">{{ filter_names.get('2', 'Fach') }} (Filter 2)</h2>
+                    <h2 class="card-title h5 mb-0">{{ filter_names.get('2', 'Fachgebiet') }} (Filter 2)</h2>
                 </div>
                 <div class="card-body">
                     <form method="POST" action="{{ url_for('add_filter_value', filter_num=2) }}" class="mb-4">

Web/templates/upload_admin.html

@@ -781,7 +781,7 @@
             {% else %}
             <!-- Normal Item Mode: Standard Filters -->
             <div class="filter-inputs">
-                <h3>Unterrichtsfach:</h3>
+                <h3>{{ filter_names.get('1', 'Jahrgangsstufe') }}</h3>
                 <div class="multi-filter">
                     <div class="form-group">
                         <label for="filter1-1">Wert 1:</label>
@@ -813,7 +813,7 @@
                     </div>
                 </div>
                 
-                <h3>Jahrgangsstufe:</h3>
+                <h3>{{ filter_names.get('2', 'Fachgebiet') }}</h3>
                 <div class="multi-filter">
                     <div class="form-group">
                         <label for="filter2-1">Wert 1:</label>
@@ -845,7 +845,7 @@
                     </div>
                 </div>
                 
-                <h3>Schlagwort:</h3>
+                <h3>{{ filter_names.get('3', 'Schlagwort') }}</h3>
                 <div class="multi-filter">
                     <div class="form-group">
                         <label for="filter3-1">Wert 1:</label>
@@ -1531,22 +1531,22 @@
         }
         const isbnField = document.getElementById('isbn');
         const infoContainer = document.getElementById('book-info-container');
-        
+
         if (!isbnField || !infoContainer) {
             alert('Fehler: Erforderliche Formularelemente nicht gefunden.');
             return;
         }
-        
+
         const isbn = normalizeIsbnClient(isbnField.value);
-        
+
         if (!isbn) {
             infoContainer.innerHTML = '<div class="error-message">Bitte geben Sie eine ISBN oder einen Barcode ein.</div>';
             return;
         }
-        
+
         // Show loading indicator
         infoContainer.innerHTML = '<div class="loading-spinner">Informationen werden abgerufen...</div>';
-        
+
         // Make API request to fetch book data
         fetch(`/fetch_book_info/${isbn}`)
             .then(response => {
@@ -1564,10 +1564,10 @@
                     infoContainer.innerHTML = `<div class="error-message">${data.error}</div>`;
                     return;
                 }
-                
+
                 // Store book data globally for import functionality
                 currentBookData = data;
-                
+
                 // Display book information with import button
                 infoContainer.innerHTML = `
                     <div class="book-info">
@@ -1602,23 +1602,23 @@
             alert('Keine Buchdaten verfügbar zum Import.');
             return;
         }
-        
+
         // Get form fields
         const nameField = document.getElementById('name');
         const descriptionField = document.getElementById('beschreibung');
         const priceField = document.getElementById('anschaffungskosten'); // <-- NEU
-        
+
         if (!nameField || !descriptionField) {
             alert('Fehler: Formularfelder nicht gefunden.');
             return;
         }
-        
+
         // Generate book title
         let bookTitle = currentBookData.title || '';
         if (currentBookData.authors && currentBookData.authors !== 'Unknown Author') {
             bookTitle += ` - ${currentBookData.authors}`;
         }
-        
+
         // Generate description
         let description = '';
         if (currentBookData.description && currentBookData.description !== 'No description available') {
@@ -1639,11 +1639,11 @@
                 description += `\nSeiten: ${currentBookData.pageCount}`;
             }
         }
-        
+
         // Import the data into form fields
         nameField.value = bookTitle;
         descriptionField.value = description;
-        
+
         // Preis in das Formularfeld eintragen
         if (priceField && currentBookData.price !== null && currentBookData.price !== undefined) {
             // Wandelt den Float (z.B. 12.25) in einen String mit Komma (12,25) um
@@ -1655,14 +1655,14 @@
         if (currentBookData.thumbnail) {
             downloadBookCover(currentBookData.thumbnail);
         }
-        
+
         // Show success message
         const infoContainer = document.getElementById('book-info-container');
         const successMessage = document.createElement('div');
         successMessage.className = 'import-success-message';
         successMessage.textContent = 'Buchdaten erfolgreich in das Formular übernommen!';
         infoContainer.appendChild(successMessage);
-        
+
         // Remove success message after 3 seconds
         setTimeout(() => {
             if (successMessage.parentNode) {

Web/templates/user_del.html

@@ -53,8 +53,11 @@
                         <option value="desc">Absteigend</option>
                     </select>
                 </div>
-                <div class="col-md-2">
-                    <button class="btn btn-secondary w-100" onclick="resetFilters()">Filter zurücksetzen</button>
+                <div class="col-md-3">
+                    <div class="d-flex gap-2">
+                        <button class="btn btn-secondary flex-grow-1" onclick="resetFilters()">Zurücksetzen</button>
+                        <button class="btn btn-success flex-grow-1" onclick="exportFilteredUsers()">Exportieren</button>
+                    </div>
                 </div>
             </div>
             <div class="mt-2 text-muted small" id="filter-count"></div>
@@ -82,19 +85,20 @@
                         <td>{{ permission_presets.get(user.permission_preset, {}).get('label', user.permission_preset) }}</td>
                         <td class="actions">
                             <form method="POST" action="{{ url_for('delete_user') }}" class="d-inline">
+                                <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
                                 <input type="hidden" name="username" value="{{ user.username }}">
                                 <button type="submit" class="btn btn-danger btn-sm" onclick="return confirm('Sind Sie sicher, dass Sie den Benutzer {{ user.username }} löschen möchten?')">
                                     Löschen
                                 </button>
                             </form>
-                            <button type="button" class="btn btn-primary btn-sm" 
+                            <button type="button" class="btn btn-primary btn-sm"
                                     data-username="{{ user.username }}"
                                     data-firstname="{{ user.name if user.name else '' }}"
                                     data-lastname="{{ user.last_name if user.last_name else '' }}"
                                     onclick="openEditUserModal(this)">
                                 Bearbeiten
                             </button>
-                            <button type="button" class="btn btn-warning btn-sm" 
+                            <button type="button" class="btn btn-warning btn-sm"
                                     onclick="openResetPasswordModal('{{ user.username }}')">
                                 Passwort zurücksetzen
                             </button>
@@ -124,6 +128,7 @@
                 <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
             </div>
             <form method="POST" action="{{ url_for('admin_update_user_permissions') }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
                 <div class="modal-body permissions-modal-body">
                     <input type="hidden" id="perm-username" name="username">
                     <div class="mb-3">
@@ -180,6 +185,7 @@
                 <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
             </div>
             <form method="POST" action="{{ url_for('admin_update_user_name') }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
                 <div class="modal-body">
                     <input type="hidden" id="edit-username" name="username">
                     <div class="mb-3">
@@ -213,6 +219,7 @@
                 <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
             </div>
             <form method="POST" action="{{ url_for('admin_reset_user_password') }}">
+                <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
                 <div class="modal-body">
                     <input type="hidden" id="reset-username" name="username">
                     <div class="mb-3">
@@ -313,6 +320,54 @@
         applyFilters();
     }
 
+    function exportFilteredUsers() {
+        var table = document.getElementById('user-table');
+        var tbody = table.querySelector('tbody');
+        var rows = Array.from(tbody.querySelectorAll('tr'));
+
+        var visibleUsernames = [];
+
+        // Sammle alle Benutzernamen, die durch den Filter aktuell NICHT versteckt sind
+        rows.forEach(function(row) {
+            if (row.style.display !== 'none') {
+                var cells = row.querySelectorAll('td');
+                if (cells.length > 0) {
+                    visibleUsernames.push(cells[0].textContent.trim());
+                }
+            }
+        });
+
+        if (visibleUsernames.length === 0) {
+            alert('Keine Benutzer zum Exportieren vorhanden.');
+            return;
+        }
+
+        // Dynamisches Formular erstellen
+        var form = document.createElement('form');
+        form.method = 'POST';
+        form.action = "{{ url_for('export_users_csv') }}";
+
+        // 1. CSRF-Token als Wert (ohne Klammern) übergeben
+        var csrfInput = document.createElement('input');
+        csrfInput.type = 'hidden';
+        csrfInput.name = 'csrf_token';
+        csrfInput.value = "{{ csrf_token }}";
+        form.appendChild(csrfInput);
+
+        // 2. Gefilterte Benutzernamen hinzufügen
+        var input = document.createElement('input');
+        input.type = 'hidden';
+        input.name = 'usernames';
+        input.value = JSON.stringify(visibleUsernames);
+        form.appendChild(input);
+
+        document.body.appendChild(form);
+        form.submit();
+
+        // Aufräumen
+        document.body.removeChild(form);
+    }
+
     document.addEventListener('DOMContentLoaded', function() {
         applyFilters();
         document.getElementById('filter-search').addEventListener('input', applyFilters);
@@ -332,12 +387,12 @@
         var username = button.getAttribute('data-username');
         var name = button.getAttribute('data-firstname');
         var lastName = button.getAttribute('data-lastname');
-        
+
         document.getElementById('edit-username').value = username;
         document.getElementById('edit-username-display').value = username;
         document.getElementById('edit-name').value = name;
         document.getElementById('edit-last-name').value = lastName;
-        
+
         var modal = new bootstrap.Modal(document.getElementById('editUserModal'));
         modal.show();
     }
@@ -345,8 +400,7 @@
     function openResetPasswordModal(username) {
         document.getElementById('reset-username').value = username;
         document.getElementById('username-display').value = username;
-        
-        // Open modal using Bootstrap
+
         var modal = new bootstrap.Modal(document.getElementById('resetPasswordModal'));
         modal.show();
     }

Web/tenant.py

@@ -17,6 +17,7 @@ import re
 import ipaddress
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
+from zoneinfo import ZoneInfo
 
 logger = logging.getLogger(__name__)
 
@@ -325,7 +326,7 @@ def get_tenant_trial_status(tenant_id=None, now=None):
     "expires_after_days", "ttl_days", or "days".
     """
     trial_config = get_tenant_trial_config(tenant_id)
-    now = now or datetime.datetime.now()
+    now = now or datetime.datetime.now(ZoneInfo("Europe/Berlin"))
 
     enabled = bool(trial_config.get('enabled') or trial_config.get('active'))
     if not enabled:
@@ -447,7 +448,7 @@ def delete_tenant(tenant_id, *, drop_database=True, remove_from_config=True):
 
 def purge_expired_trial_tenants(now=None):
     """Delete expired trial tenants that opted into auto-delete."""
-    now = now or datetime.datetime.now()
+    now = now or datetime.datetime.now(ZoneInfo("Europe/Berlin"))
     purged_tenants = []
 
     for tenant_id in list(TENANT_REGISTRY.keys()):