Reformat code after manual edits to maintain CI compliance

- Apply Black formatting to admin.py, forms.py, and views.py after manual edits
- Fix import statement ordering with isort
- Ensure all manually edited files meet automated code quality standards
- Maintain CI/CD pipeline compliance for continued automated deployment

app/stiftung/forms.py

@@ -4,11 +4,22 @@ from django import forms
 from django.core.exceptions import ValidationError
 from django.utils import timezone
 
-from .models import (BankTransaction, Destinataer, DestinataerNotiz,
-                     DestinataerUnterstuetzung, DokumentLink, Foerderung, Land,
-                     LandAbrechnung, Paechter, Person, Rentmeister,
-                     StiftungsKonto, UnterstuetzungWiederkehrend,
-                     Verwaltungskosten)
+from .models import (
+    BankTransaction,
+    Destinataer,
+    DestinataerNotiz,
+    DestinataerUnterstuetzung,
+    DokumentLink,
+    Foerderung,
+    Land,
+    LandAbrechnung,
+    Paechter,
+    Person,
+    Rentmeister,
+    StiftungsKonto,
+    UnterstuetzungWiederkehrend,
+    Verwaltungskosten,
+)
 
 
 class RentmeisterForm(forms.ModelForm):