Security: Require authentication for home page view

- Add @login_required decorator to home view function
- Ensures all views now require user authentication
- Prevents unauthorized access to homepage and dashboard
- Part of comprehensive authentication security implementation

app/stiftung/views.py

@@ -222,7 +222,7 @@ from .forms import (DestinataerForm, DestinataerNotizForm,
                     FoerderungForm, LandForm, PaechterForm, PersonForm,
                     UnterstuetzungForm, UnterstuetzungMarkAsPaidForm, VierteljahresNachweisForm)
 
-
+@login_required
 def home(request):
     """Home page for the Stiftungsverwaltung application"""
     from stiftung.services.calendar_service import StiftungsKalenderService