chore: bump version to v0.8.19

- Added `remove_done` function to clean up finished appointments in the database.
- Introduced `get_upcoming_for_user` function to retrieve upcoming appointments for a specific user.
- Updated `backend_server.py` to include a new endpoint for fetching user-specific upcoming events.
- Modified `blueprint.py` to render upcoming events in the user interface.
- Enhanced `terminplan.html` to display a list of upcoming appointments with relevant details and action links.
- Updated configuration to enable the new appointment planning feature.

.release-version

@@ -1 +1 @@
-v0.8.12
+v0.8.19

Web/app.py

@@ -84,7 +84,7 @@ from Web.modules.terminplaner.blueprint import appoint_bp as terminplaner_bp
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 import Web.modules.database.settings as cfg
 from Web.modules.database.settings import MongoClient
-from tenant import get_tenant_context, get_tenant_trial_status, purge_expired_trial_tenants
+from tenant import get_tenant_context, get_tenant_db, get_tenant_trial_status, purge_expired_trial_tenants
 
 
 app = Flask(__name__, static_folder='static')  # Correctly set static folder
@@ -626,14 +626,18 @@ def handle_unexpected_exception(e):
     if request.is_json or request.path.startswith('/api/'):
         return jsonify({'error': 'Internal server error', 'status': 500}), 500
 
-    if 'username' in session:
+    try:
+        return render_template(
+            'maintenance.html',
+            error_code=500,
+            error_message='Das System führt gerade Wartungsarbeiten durch.',
+        ), 500
+    except Exception:
         try:
-            return render_template('error.html', error_code=500, error_message='Interner Serverfehler.'), 500
+            return render_template('error.html', error_code=500, error_message='Das System führt gerade Wartungsarbeiten durch.'), 500
         except Exception:
             return 'Internal Server Error', 500
 
-    return redirect(url_for('login'))
-
 
 def _csrf_error_response(message='CSRF token fehlt oder ist ungültig.'):
     if request.is_json or request.path.startswith('/api/') or request.path in {'/download_book_cover', '/proxy_image', '/log_mobile_issue'}:
@@ -4799,6 +4803,82 @@ def get_bookings():
             client.close()
 
 
+@app.route('/get_user_appointments')
+def get_user_appointments():
+    """Return the current user's planned and active appointments for the calendar."""
+    if 'username' not in session:
+        return jsonify({'ok': False, 'error': 'unauthorized'}), 401
+
+    client = None
+    try:
+        username = session.get('username')
+
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        db = client[MONGODB_DB]
+        items_col = db['items']
+
+        # Use the established user-specific route logic for appointments.
+        bookings = au.get_ausleihung_by_user(
+            username,
+            status=['planned', 'active', 'completed'],
+            use_client_side_verification=True,
+        )
+        bookings = sorted(bookings, key=lambda b: b.get('Start') or datetime.datetime.min)
+
+        result = []
+        for booking in bookings:
+            start_dt = booking.get('Start')
+            if not start_dt:
+                continue
+
+            end_dt = booking.get('End')
+            if not end_dt and isinstance(start_dt, datetime.datetime):
+                end_dt = start_dt + datetime.timedelta(minutes=45)
+            elif not end_dt:
+                end_dt = start_dt
+
+            item_id = str(booking.get('Item') or '')
+            item_doc = None
+            if item_id:
+                try:
+                    item_doc = items_col.find_one({'_id': ObjectId(item_id)})
+                except Exception:
+                    item_doc = None
+
+            item_name = item_id or 'Termin'
+            if item_doc:
+                item_name = item_doc.get('Name') or item_doc.get('Code_4') or item_name
+
+            period = booking.get('Period')
+            title = item_name
+            if period:
+                title = f"{title} - {period}. Std"
+
+            status = booking.get('VerifiedStatus') or booking.get('Status') or 'unknown'
+            if status == 'active':
+                status = 'current'
+            result.append({
+                'id': str(booking.get('_id')),
+                'title': title,
+                'start': start_dt.isoformat() if isinstance(start_dt, datetime.datetime) else str(start_dt),
+                'end': end_dt.isoformat() if isinstance(end_dt, datetime.datetime) else str(end_dt),
+                'status': status,
+                'itemId': item_id,
+                'userName': str(booking.get('User') or ''),
+                'notes': str(booking.get('Notes') or ''),
+                'period': period,
+                'isCurrentUser': True,
+                'itemBorrower': '',
+            })
+
+        return jsonify({'ok': True, 'bookings': result})
+    except Exception as e:
+        return jsonify({'ok': False, 'error': str(e), 'bookings': []}), 500
+    finally:
+        if client:
+            client.close()
+
+
 @app.route('/api/booking_conflicts')
 def api_booking_conflicts():
     """

Web/modules/database/termine.py

@@ -22,6 +22,14 @@ from Web.modules.database.settings import MongoClient
 from bson.objectid import ObjectId
 import datetime 
 
+
+def _get_tenant_db(client):
+    try:
+        from tenant import get_tenant_db
+        return get_tenant_db(client)
+    except Exception:
+        return client[cfg.MONGODB_DB]
+
 def _active_record_query(extra_query=None):
     """Build a query that excludes logically deleted records."""
     base_query = {'Deleted': {'$ne': True}}
@@ -33,7 +41,7 @@ def _active_record_query(extra_query=None):
 def add(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght: int, user: str, mail: list=[], note:str="", calendar_enabled: bool=False):
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
-        db = client[cfg.MONGODB_DB]
+        db = _get_tenant_db(client)
         items = db['appointments']
 
         item = {
@@ -68,7 +76,7 @@ def get_item(id):
     """
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
-        db = client[cfg.MONGODB_DB]
+        db = _get_tenant_db(client)
         items = db['appointments']
         item = items.find_one(_active_record_query({'_id': ObjectId(id)}))
         client.close()
@@ -90,11 +98,11 @@ def update(id,slots_used: list):
     """
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
-        db = client[cfg.MONGODB_DB]
+        db = _get_tenant_db(client)
         items = db['appointments']
 
         update_data = {
-            'slots_booked': [slots_used],
+            'slots_booked': slots_used,
             'LastUpdated': datetime.datetime.now()
         }
 
@@ -124,7 +132,7 @@ def remove_slot(id, date_start_time, name):
     """
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
-        db = client[cfg.MONGODB_DB]
+        db = _get_tenant_db(client)
         items = db['appointments']
 
         # Attempt to pull the exact element (stored as an array/tuple)
@@ -152,15 +160,75 @@ def remove(id):
     """
     try:
         client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
-        db = client[cfg.MONGODB_DB]
+        db = _get_tenant_db(client)
         items = db['appointments']
 
         result = items.delete_one({'_id': ObjectId(id)})
 
         client.close()
-        return result.modified_count > 0
+        return result.deleted_count > 0
     except Exception as e:
         print(f"Error removing appointment: {e}")
         return False
 
+def remove_done():
+    """removose already finisched appointments"""
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = _get_tenant_db(client)
+        items = db['appointments']
+
+        today = datetime.date.today().strftime('%Y-%m-%d')
+        removed_count = 0
+
+        cursor = items.find(
+            _active_record_query(
+                {
+                    'date_end': {'$lt': today},
+                }
+            )
+        ).sort('date_start', 1)
+
+        for item in cursor:
+            item['_id'] = str(item.get('_id'))
+            result = items.delete_one({'_id': ObjectId(item['_id'])})
+            removed_count += result.deleted_count
+        
+        client.close()
+        return removed_count > 0
+    except Exception as e:
+        print(f"Error removing appointment: {e}")
+        return False
+
+def get_upcoming_for_user(user: str, limit: int = 25):
+    """Return upcoming appointment plans for a user ordered by start date."""
+    remove_done()
+    try:
+        client = MongoClient(cfg.MONGODB_HOST, cfg.MONGODB_PORT)
+        db = _get_tenant_db(client)
+        items = db['appointments']
+
+        today = datetime.date.today().strftime('%Y-%m-%d')
+        cursor = items.find(
+            _active_record_query(
+                {
+                    'user': str(user or '').strip(),
+                    'date_end': {'$gte': today},
+                }
+            )
+        ).sort('date_start', 1)
+
+        results = []
+        for item in cursor:
+            item['_id'] = str(item.get('_id'))
+            results.append(item)
+            if len(results) >= max(1, int(limit)):
+                break
+
+        client.close()
+        return results
+    except Exception as e:
+        print(f"Error retrieving upcoming appointments: {e}")
+        return []
+
  

Web/modules/terminplaner/backend_server.py

@@ -3,13 +3,39 @@ Class for all funktions of the executive -> Lehrer
 """
 import datetime
 from datetime import timedelta
-from flask import url_for
+from flask import url_for, has_request_context, request
 import Web.modules.emailservice.email as mail_service
 import Web.modules.database.termine as termin
 import Web.modules.database.settings as cfg
 from Web.tenant import get_tenant_context
 
 
+def _resolve_public_base_url() -> str:
+    if has_request_context():
+        try:
+            return request.url_root.rstrip('/')
+        except Exception:
+            pass
+
+    tenant_context = get_tenant_context()
+    subdomain = ''
+    if tenant_context:
+        subdomain = getattr(tenant_context, 'subdomain', '') or getattr(tenant_context, 'tenant_id', '') or ''
+    return f"https://{subdomain}.invario.eu" if subdomain else "https://invario.eu"
+
+
+def _current_tenant_id() -> str:
+    tenant_context = get_tenant_context()
+    if tenant_context and getattr(tenant_context, 'tenant_id', None):
+        return str(tenant_context.tenant_id)
+    if has_request_context():
+        try:
+            return str(request.args.get('tenant', '') or request.args.get('tenant_id', '') or '').strip()
+        except Exception:
+            return ''
+    return ''
+
+
 def _normalize_time_span(time_span):
     if isinstance(time_span, list):
         return [str(entry).strip() for entry in time_span if str(entry).strip()]
@@ -56,15 +82,14 @@ def build_calendar_ics(appointment_id: str) -> str | None:
     time_span = item.get('time_span', []) or []
     creator = item.get('user', 'Terminplaner')
     note = item.get('note', '') or ''
+    tenant_id = _current_tenant_id()
     try:
-        link = url_for('terminplaner.client', appointment_id=str(appointment_id), _external=True)
+        link = url_for('terminplaner.client', appointment_id=str(appointment_id), tenant=tenant_id or None, _external=True)
     except Exception:
-        tenant_context = get_tenant_context()
-        subdomain = ''
-        if tenant_context:
-            subdomain = getattr(tenant_context, 'subdomain', '') or getattr(tenant_context, 'tenant_id', '') or ''
-        host = f"https://{subdomain}.invario.eu" if subdomain else "https://invario.eu"
+        host = _resolve_public_base_url()
         link = host + "/terminplaner/client/" + str(appointment_id)
+        if tenant_id:
+            link += f"?tenant={tenant_id}"
 
     try:
         start_date = datetime.datetime.strptime(str(date_start), '%Y-%m-%d').date()
@@ -123,30 +148,26 @@ def new(date_start: str, date_end: str, time_span: list, slots: int, slot_lenght
     normalized_mail = _normalize_mail_list(mail)
     id = termin.add(date_start, date_end, normalized_time_span, slots, slot_lenght, user, normalized_mail, note, calendar_enabled=calendar_enabled)
     id_str = str(id)
-
-    tenant_context = get_tenant_context()
-    subdomain = ''
-    if tenant_context:
-        subdomain = getattr(tenant_context, 'subdomain', '') or getattr(tenant_context, 'tenant_id', '') or ''
+    tenant_id = _current_tenant_id()
 
     try:
-        link = url_for('terminplaner.client', appointment_id=id_str, _external=True)
+        link = url_for('terminplaner.client', appointment_id=id_str, tenant=tenant_id or None, _external=True)
     except Exception:
-        host = f"https://{subdomain}.invario.eu" if subdomain else "https://invario.eu"
+        host = _resolve_public_base_url()
         link = host + "/terminplaner/client/" + id_str
+        if tenant_id:
+            link += f"?tenant={tenant_id}"
     subject = f"Terminanfrage von {user}"
     note_link = note + f"Bitte klicken sie auf den folgenden Link um einen Termin zu vereinbaren: {link}"
     calendar_link = None
     if calendar_enabled:
         try:
-            calendar_link = url_for('terminplaner.calendar_export', appointment_id=id_str, _external=True)
+            calendar_link = url_for('terminplaner.calendar_export', appointment_id=id_str, tenant=tenant_id or None, _external=True)
         except Exception:
-            tenant_context = get_tenant_context()
-            subdomain = ''
-            if tenant_context:
-                subdomain = getattr(tenant_context, 'subdomain', '') or getattr(tenant_context, 'tenant_id', '') or ''
-            host = f"https://{subdomain}.invario.eu" if subdomain else "https://invario.eu"
+            host = _resolve_public_base_url()
             calendar_link = host + "/terminplaner/calendar/" + id_str + ".ics"
+            if tenant_id:
+                calendar_link += f"?tenant={tenant_id}"
 
     email_body = note_link
     if calendar_link:
@@ -272,6 +293,17 @@ def get_available(id):
         time_span = termin_range.get('time_span', [])
         slot_lenght = termin_range.get('slot_lenght')
         total_slots = termin_range.get('slots', 0)
+        # Ensure numeric fields are cast to int when stored as strings
+        try:
+            total_slots = int(termin_range.get('slots', 0) or 0)
+        except Exception:
+            total_slots = 0
+
+        try:
+            slot_lenght = int(termin_range.get('slot_lenght') or 0)
+        except Exception:
+            slot_lenght = termin_range.get('slot_lenght')
+
         booked = termin_range.get('slots_booked', []) or []
 
         # Normalize booked entries to dicts for easier consumption
@@ -285,7 +317,10 @@ def get_available(id):
                 normalized.append({'value': s})
 
         slots_used = len(normalized)
-        slots_left = max(0, total_slots - slots_used)
+        try:
+            slots_left = max(0, int(total_slots) - slots_used)
+        except Exception:
+            slots_left = max(0, slots_used - slots_used)
 
         return {
             'date_start': date_start,
@@ -312,4 +347,57 @@ def get_available_user(id):
     - dict: all the needet information -> [Start_date, End_date, (first day Time Frame, 
     second day Time frame, third etc.), slot lenght, (bookedslots -> list)]
     """
-    return get_available(id)
+    return get_available(id)
+
+
+def get_user_upcoming_events(user: str, limit: int = 25) -> list[dict]:
+    """Return upcoming appointment plans for overview display."""
+    user_name = str(user or '').strip()
+    if not user_name:
+        return []
+
+    appointments = termin.get_upcoming_for_user(user_name, limit=limit)
+    host = _resolve_public_base_url()
+    tenant_id = _current_tenant_id()
+
+    result = []
+    for item in appointments:
+        appointment_id = str(item.get('_id') or '')
+        if not appointment_id:
+            continue
+
+        try:
+            link = url_for('terminplaner.client', appointment_id=appointment_id, tenant=tenant_id or None, _external=True)
+        except Exception:
+            link = host + '/terminplaner/client/' + appointment_id
+            if tenant_id:
+                link += f'?tenant={tenant_id}'
+
+        try:
+            calendar_link = url_for('terminplaner.calendar_export', appointment_id=appointment_id, tenant=tenant_id or None, _external=True)
+        except Exception:
+            calendar_link = host + '/terminplaner/calendar/' + appointment_id + '.ics'
+            if tenant_id:
+                calendar_link += f'?tenant={tenant_id}'
+
+        slots_total = int(item.get('slots', 0) or 0)
+        slots_booked = item.get('slots_booked', []) or []
+        if not isinstance(slots_booked, list):
+            slots_booked = []
+
+        result.append(
+            {
+                'appointment_id': appointment_id,
+                'date_start': str(item.get('date_start') or ''),
+                'date_end': str(item.get('date_end') or ''),
+                'time_span': item.get('time_span', []) or [],
+                'slots_total': slots_total,
+                'slots_booked': len(slots_booked),
+                'slots_left': max(0, slots_total - len(slots_booked)),
+                'note': str(item.get('note') or ''),
+                'link': link,
+                'calendar_link': calendar_link if item.get('calendar_enabled') else None,
+            }
+        )
+
+    return result

Web/modules/terminplaner/blueprint.py

@@ -2,6 +2,8 @@ from flask import Blueprint, render_template, request, session, url_for, redirec
 from flask import Response
 import Web.modules.terminplaner.backend_server as appointment_service
 import Web.modules.database.settings as cfg
+import Web.modules.database.termine as termin
+import Web.modules.database.user as us
 
 # Create a blueprint instance
 appoint_bp = Blueprint('terminplaner', __name__)
@@ -13,6 +15,25 @@ def _require_module_enabled():
         return redirect(url_for('home'))
     return None
 
+
+def _appointment_not_found_response():
+    return render_template(
+        'terminplaner_not_found.html',
+        error_code=404,
+        error_message='Der Termin wurde nicht gefunden.',
+    ), 404
+
+
+def _current_tenant_id():
+    try:
+        from Web.tenant import get_tenant_context
+        ctx = get_tenant_context()
+        if ctx and getattr(ctx, 'tenant_id', None):
+            return str(ctx.tenant_id)
+    except Exception:
+        pass
+    return str(session.get('tenant_id', '') or '').strip()
+
 @appoint_bp.route('/client/<appointment_id>', methods=['POST', 'GET'])
 def client(appointment_id):
     """
@@ -24,8 +45,7 @@ def client(appointment_id):
 
     available = appointment_service.get_available(appointment_id)
     if not available:
-        flash('Der Termin wurde nicht gefunden.', 'error')
-        return redirect(url_for('terminplan'))
+        return _appointment_not_found_response()
 
     if request.method == 'POST':
         start_daytime = request.form.get('start_day_time')
@@ -50,8 +70,37 @@ def client(appointment_id):
         appointment_id=appointment_id,
         available=available,
         current_user=session.get('username', ''),
+        tenant_id=_current_tenant_id(),
     )
 
+
+@appoint_bp.route('/delete/<appointment_id>', methods=['POST'])
+def delete_appointment(appointment_id):
+    guard = _require_module_enabled()
+    if guard:
+        return guard
+
+    if 'username' not in session:
+        flash('Bitte mit einem Konto anmelden.', 'error')
+        return redirect(url_for('login'))
+
+    appointment = termin.get_item(appointment_id)
+    if not appointment:
+        return _appointment_not_found_response()
+
+    current_user = str(session.get('username', '')).strip()
+    appointment_user = str(appointment.get('user', '')).strip()
+    if not us.check_admin(current_user) and appointment_user != current_user:
+        flash('Sie dürfen diesen Termin nicht löschen.', 'error')
+        return redirect(url_for('terminplaner.main', tenant=_current_tenant_id() or None))
+
+    if termin.remove(appointment_id):
+        flash('Der Terminplan wurde gelöscht.', 'success')
+    else:
+        flash('Der Terminplan konnte nicht gelöscht werden.', 'error')
+
+    return redirect(url_for('terminplaner.main', tenant=_current_tenant_id() or None))
+
 @appoint_bp.route('/configure', methods=['GET', 'POST'])
 def configure():
     """
@@ -113,8 +162,7 @@ def calendar_export(appointment_id):
 
     ics_content = appointment_service.build_calendar_ics(appointment_id)
     if not ics_content:
-        flash('Der Termin wurde nicht gefunden.', 'error')
-        return redirect(url_for('terminplaner.configure'))
+        return _appointment_not_found_response()
 
     response = Response(ics_content, mimetype='text/calendar; charset=utf-8')
     response.headers['Content-Disposition'] = f'attachment; filename=terminplan-{appointment_id}.ics'
@@ -126,8 +174,14 @@ def main():
     if guard:
         return guard
 
+    current_user = session.get('username', '')
+    upcoming_events = appointment_service.get_user_upcoming_events(current_user) if current_user else []
+    tenant_id = _current_tenant_id()
+
     return render_template(
         'terminplaner.html',
         school_periods=cfg.SCHOOL_PERIODS,
-        current_user=session.get('username', ''),
+        current_user=current_user,
+        upcoming_events=upcoming_events,
+        tenant_id=tenant_id,
     )

Web/templates/maintenance.html

@@ -0,0 +1,28 @@
+{% extends "base.html" %}
+
+{% block title %}Wartungsarbeiten - Inventarsystem{% endblock %}
+
+{% block content %}
+<div class="container py-5">
+    <div class="row justify-content-center">
+        <div class="col-12 col-lg-8 col-xl-7">
+            <div class="card border-0 shadow-lg rounded-4 overflow-hidden">
+                <div class="card-header text-white" style="background: linear-gradient(135deg, #0f4c5c, #16697a);">
+                    <p class="text-uppercase small fw-semibold mb-1 opacity-75">Systemstatus</p>
+                    <h1 class="h3 mb-0 fw-bold">Wartungsarbeiten</h1>
+                </div>
+                <div class="card-body p-4 p-md-5 bg-white text-center">
+                    <div class="display-3 fw-bold text-warning mb-3">500</div>
+                    <p class="lead mb-2">Das System führt gerade Wartungsarbeiten durch.</p>
+                    <p class="text-muted mb-4">Bitte versuchen Sie es in wenigen Minuten erneut. Falls das Problem bestehen bleibt, informieren Sie bitte die Administration.</p>
+
+                    <div class="d-flex flex-column flex-sm-row justify-content-center gap-2">
+                        <a href="{{ url_for('login') }}" class="btn btn-primary btn-lg">Zum Login</a>
+                        <a href="javascript:history.back()" class="btn btn-outline-secondary btn-lg">Zurück</a>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}

Web/templates/termin_client.html

@@ -44,7 +44,7 @@
                     <div class="card border-0 shadow-lg rounded-4 h-100">
                         <div class="card-body p-4 p-md-5 bg-white">
                             <h2 class="h4 fw-bold mb-4">Buchung absenden</h2>
-                            <form method="post" action="{{ url_for('terminplaner.client', appointment_id=appointment_id) }}" class="vstack gap-3">
+                            <form method="post" action="{{ url_for('terminplaner.client', appointment_id=appointment_id, tenant=tenant_id) }}" class="vstack gap-3">
                                 <div>
                                     <label for="start_day_time" class="form-label fw-semibold">Gewünschter Zeitpunkt</label>
                                     <input type="text" id="start_day_time" name="start_day_time" class="form-control form-control-lg" placeholder="2026-05-29 10:30" required>
@@ -56,7 +56,7 @@
                                 </div>
                                 <div class="d-flex flex-column flex-sm-row gap-2 pt-2">
                                     <button type="submit" class="btn btn-primary btn-lg">Termin buchen</button>
-                                    <a class="btn btn-outline-secondary btn-lg" href="{{ url_for('terminplaner.main') }}">Zur Übersicht</a>
+                                    <a class="btn btn-outline-secondary btn-lg" href="{{ url_for('terminplaner.main', tenant=tenant_id) }}">Zur Übersicht</a>
                                 </div>
                             </form>
                         </div>

Web/templates/terminplaner.html

@@ -14,8 +14,8 @@
                         <p class="lead mb-0" style="max-width: 60ch; opacity: .95;">Erstellen Sie neue Terminreihen, teilen Sie Buchungslinks und öffnen Sie den Kalender für bestehende Reservierungen.</p>
                     </div>
                     <div class="d-flex flex-wrap gap-2">
-                        <a class="btn btn-light btn-lg fw-semibold" href="{{ url_for('terminplaner.configure') }}">Neue Planung</a>
-                        <a class="btn btn-outline-light btn-lg fw-semibold" href="{{ url_for('terminplan') }}">Kalender öffnen</a>
+                        <a class="btn btn-light btn-lg fw-semibold" href="{{ url_for('terminplaner.configure', tenant=tenant_id) }}">Neue Planung</a>
+                        <a class="btn btn-outline-light btn-lg fw-semibold" href="{{ url_for('terminplan', tenant=tenant_id) }}">Kalender öffnen</a>
                     </div>
                 </div>
             </section>
@@ -27,7 +27,7 @@
                             <div class="display-6 mb-3">🗓️</div>
                             <h2 class="h4 fw-bold">Kalender</h2>
                             <p class="mb-4 text-muted">Sehen Sie vorhandene Termine, ihre Auslastung und die aktuellen Reservierungen im Kalender.</p>
-                            <a class="btn btn-primary w-100" href="{{ url_for('terminplan') }}">Zum Kalender</a>
+                            <a class="btn btn-primary w-100" href="{{ url_for('terminplan', tenant=tenant_id) }}">Zum Kalender</a>
                         </div>
                     </div>
                 </div>
@@ -37,7 +37,7 @@
                             <div class="display-6 mb-3">✍️</div>
                             <h2 class="h4 fw-bold">Neue Planung</h2>
                             <p class="mb-4 text-muted">Erstellen Sie einen neuen Terminplan und verschicken Sie den Buchungslink an Ihre Zielgruppe.</p>
-                            <a class="btn btn-outline-primary w-100" href="{{ url_for('terminplaner.configure') }}">Konfiguration öffnen</a>
+                            <a class="btn btn-outline-primary w-100" href="{{ url_for('terminplaner.configure', tenant=tenant_id) }}">Konfiguration öffnen</a>
                         </div>
                     </div>
                 </div>
@@ -58,6 +58,48 @@
                 <h2 class="h5 fw-bold mb-2">Angemeldet als {{ current_user }}</h2>
                 <p class="mb-0 text-muted">Sie können Termine anlegen, den Kalender prüfen und Buchungslinks verteilen.</p>
             </div>
+
+            <div class="mt-4 p-4 rounded-4 bg-white shadow-sm">
+                <div class="d-flex flex-column flex-md-row justify-content-between align-items-md-center gap-2 mb-3">
+                    <h2 class="h5 fw-bold mb-0">Kommende Termine</h2>
+                    <span class="text-muted small">Alle offenen Terminpläne dieses Nutzers</span>
+                </div>
+
+                {% if upcoming_events %}
+                <div class="vstack gap-3">
+                    {% for event in upcoming_events %}
+                    <div class="border rounded-3 p-3">
+                        <div class="d-flex flex-column flex-lg-row justify-content-between gap-3">
+                            <div>
+                                <div class="fw-semibold">{{ event.date_start }} bis {{ event.date_end }}</div>
+                                <div class="text-muted small">ID: {{ event.appointment_id }}</div>
+                                {% if event.time_span %}
+                                <div class="small mt-1">Zeitfenster: {{ event.time_span|join(' | ') }}</div>
+                                {% endif %}
+                                {% if event.note %}
+                                <div class="small mt-1 text-muted">Notiz: {{ event.note }}</div>
+                                {% endif %}
+                            </div>
+                            <div class="text-lg-end">
+                                <div class="small mb-2">Gebucht: <strong>{{ event.slots_booked }}</strong> / {{ event.slots_total }} | Frei: <strong>{{ event.slots_left }}</strong></div>
+                                <div class="d-flex flex-wrap gap-2 justify-content-lg-end">
+                                    <a class="btn btn-sm btn-primary" href="{{ event.link }}" target="_blank" rel="noopener">Client-Link öffnen</a>
+                                    {% if event.calendar_link %}
+                                    <a class="btn btn-sm btn-outline-primary" href="{{ event.calendar_link }}">.ics</a>
+                                    {% endif %}
+                                    <form method="post" action="{{ url_for('terminplaner.delete_appointment', appointment_id=event.appointment_id, tenant=tenant_id) }}" class="d-inline" onsubmit="return confirm('Diesen Terminplan wirklich löschen?');">
+                                        <button type="submit" class="btn btn-sm btn-outline-danger">Entfernen</button>
+                                    </form>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                    {% endfor %}
+                </div>
+                {% else %}
+                <div class="text-muted">Keine kommenden Termine gefunden.</div>
+                {% endif %}
+            </div>
             {% endif %}
         </div>
     </div>

Web/templates/terminplaner_not_found.html

@@ -0,0 +1,28 @@
+{% extends "base.html" %}
+
+{% block title %}Termin nicht gefunden - Inventarsystem{% endblock %}
+
+{% block content %}
+<div class="container py-5">
+    <div class="row justify-content-center">
+        <div class="col-12 col-lg-8 col-xl-7">
+            <div class="card border-0 shadow-lg rounded-4 overflow-hidden">
+                <div class="card-header text-white" style="background: linear-gradient(135deg, #0f4c5c, #16697a);">
+                    <p class="text-uppercase small fw-semibold mb-1 opacity-75">Terminplaner</p>
+                    <h1 class="h3 mb-0 fw-bold">Termin nicht gefunden</h1>
+                </div>
+                <div class="card-body p-4 p-md-5 bg-white text-center">
+                    <div class="display-3 fw-bold text-danger mb-3">404</div>
+                    <p class="lead mb-2">Der angeforderte Termin existiert nicht mehr oder der Link ist ungültig.</p>
+                    <p class="text-muted mb-4">Bitte prüfen Sie den Link erneut oder öffnen Sie den Terminplaner von der Startseite aus.</p>
+
+                    <div class="d-flex flex-column flex-sm-row justify-content-center gap-2">
+                        <a href="{{ url_for('home') }}" class="btn btn-primary btn-lg">Zur Startseite</a>
+                        <a href="javascript:history.back()" class="btn btn-outline-secondary btn-lg">Zurück</a>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
+{% endblock %}

Web/tenant.py

@@ -473,6 +473,20 @@ class TenantContext:
         if not has_request_context():
             return None
 
+        # Query parameters are useful for public links that must open a specific tenant
+        # even when the host/subdomain cannot be mapped reliably.
+        tenant_from_query = (
+            request.args.get('tenant', '').strip()
+            or request.args.get('tenant_id', '').strip()
+            or request.args.get('tenantId', '').strip()
+        )
+        if tenant_from_query:
+            matched_tenant = _find_registered_tenant_id(tenant_from_query) or tenant_from_query
+            self.tenant_id = matched_tenant
+            self.config = get_tenant_config(matched_tenant)
+            session['tenant_id'] = matched_tenant
+            return self._get_db_name(matched_tenant)
+
         # Priority 1: X-Tenant-ID header (for testing/internal APIs)
         tenant_from_header = request.headers.get('X-Tenant-ID', '').strip()
         if tenant_from_header:
@@ -531,6 +545,10 @@ class TenantContext:
                     potential_subdomain = parts[0]
                     if potential_subdomain not in ('www', 'api', 'admin', 'app', 'mail'):
                         matched_tenant = _find_registered_tenant_id(potential_subdomain)
+                        if not matched_tenant and potential_subdomain.startswith('school'):
+                            matched_tenant = _find_registered_tenant_id('schule' + potential_subdomain[len('school'):])
+                        elif not matched_tenant and potential_subdomain.startswith('schule'):
+                            matched_tenant = _find_registered_tenant_id('school' + potential_subdomain[len('schule'):])
                         if matched_tenant:
                             self.subdomain = potential_subdomain
                             self.tenant_id = matched_tenant

config.json

@@ -53,6 +53,9 @@
         "inventory": {
             "enabled": true
         },
+        "terminplan": {
+            "enabled": true
+        },
         "library": {
             "enabled": true
         },

tools/debug_get_appointment.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""
+Small debug script to check tenant-aware lookup for an appointment id.
+Usage: ./tools/debug_get_appointment.py <appointment_id> [tenant]
+"""
+import sys
+from bson.objectid import ObjectId
+from Web.modules.database.settings import MongoClient, MONGODB_HOST, MONGODB_PORT, MONGODB_DB
+import Web.modules.database.termine as termine
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: debug_get_appointment.py <appointment_id> [tenant]")
+        sys.exit(2)
+    aid = sys.argv[1]
+    tenant = sys.argv[2] if len(sys.argv) > 2 else None
+
+    if tenant:
+        print(f"Looking up appointment {aid} for tenant {tenant}")
+    else:
+        print(f"Looking up appointment {aid} for default tenant")
+
+    try:
+        # Use the module helper directly
+        item = termine.get_item(aid)
+        if item:
+            print('Found with termini.get_item:')
+            print(item)
+        else:
+            print('termin.get_item returned None')
+
+        # Try explicit MongoClient + tenant DB resolution
+        client = MongoClient(MONGODB_HOST, MONGODB_PORT)
+        try:
+            from Web.tenant import TenantContext, get_tenant_db
+            if tenant:
+                ctx = TenantContext()
+                ctx.tenant_id = tenant
+                db = ctx.get_database(client)
+            else:
+                db = get_tenant_db(client) if 'get_tenant_db' in dir() else client[MONGODB_DB]
+
+            doc = db['appointments'].find_one({'_id': ObjectId(aid)})
+            print('Direct DB find_one returned:')
+            print(doc)
+        finally:
+            client.close()
+    except Exception as e:
+        print('Error during debug lookup:', e)
+
+
+if __name__ == '__main__':
+    main()