Enhance destinataer list: 50 entries per page + default sort by last name

🎯 Improvements Made:
- Increased pagination from 20 to 50 entries per page
- Added default sorting by last name (nachname) in ascending order
- Added visual sorting indicators with Font Awesome icons (up/down arrows)
- Added results info showing current page range and total count
- Display shows sorting method when active

📊 User Experience:
- List now shows 50 destinataers by default (as requested)
- Always sorted by last name for consistent browsing
- Clear visual feedback for which column is sorted
- Informative pagination showing 'X-Y of Z entries (50 per page)'

✅ Template & View Changes:
- Modified destinataer_list view in views.py
- Enhanced destinataer_list.html template
- Maintained all existing filtering and search functionality

app/stiftung/views.py

@@ -1190,11 +1190,18 @@ def destinataer_list(request):
         else:
             order_fields = fields
         destinataere = destinataere.order_by(*order_fields)
+    else:
+        # Default sorting by last name (nachname) ascending
+        destinataere = destinataere.order_by("nachname", "vorname")
 
-    paginator = Paginator(destinataere, 20)
+    paginator = Paginator(destinataere, 50)  # Increased from 20 to 50 entries per page
     page_number = request.GET.get("page")
     page_obj = paginator.get_page(page_number)
 
+    # Set default sort to nachname if no sort is specified
+    effective_sort = sort if sort else "nachname"
+    effective_direction = direction if sort else "asc"
+    
     context = {
         "page_obj": page_obj,
         "search_query": search_query,
@@ -1203,8 +1210,8 @@ def destinataer_list(request):
         "aktiv_filter": aktiv_filter,
         "familienzweig_choices": Destinataer.FAMILIENZWIG_CHOICES,
         "berufsgruppe_choices": Destinataer.BERUFSGRUPPE_CHOICES,
-        "sort": sort,
-        "dir": direction,
+        "sort": effective_sort,
+        "dir": effective_direction,
     }
     return render(request, "stiftung/destinataer_list.html", context)