Fix: Implement proper deletion of order items with confirmation dialog

Fixes deletion functionality for order items across frontend and backend:
- Remove restriction preventing deletion of last item
- Add confirmation dialog before deletion
- Properly track and send deleted item IDs to backend via autosave
- Update backend to handle item deletion by ID instead of index
- Fix visual feedback: deleted items are hidden immediately
- Auto-recalculate total sum after deletion

Technical changes:
- order_form.html: Add confirmation dialog, trigger autosave on delete
- autosave.js: Collect deleted item IDs, send to backend
- draft_service.py: Process deleted_item_ids, update items by ID

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

myproject/products/views/api_views.py

@@ -73,7 +73,7 @@ def search_products_and_variants(request):
                 numeric_id = int(item_id)
 
             if item_type == 'product':
-                product = Product.objects.get(id=numeric_id, is_active=True)
+                product = Product.objects.get(id=numeric_id, status='active')
                 return JsonResponse({
                     'results': [{
                         'id': f'product_{product.id}',
@@ -89,7 +89,7 @@ def search_products_and_variants(request):
             elif item_type == 'kit':
                 # Для комплектов: временные комплекты можно получать по ID (для заказов)
                 # но не показываем их в общем поиске
-                kit = ProductKit.objects.get(id=numeric_id, is_active=True)
+                kit = ProductKit.objects.get(id=numeric_id, status='active')
                 return JsonResponse({
                     'results': [{
                         'id': f'kit_{kit.id}',
@@ -170,7 +170,7 @@ def search_products_and_variants(request):
 
         if search_type in ['all', 'kit']:
             # Показываем последние добавленные активные комплекты (только постоянные)
-            kits = ProductKit.objects.filter(is_active=True, is_temporary=False)\
+            kits = ProductKit.objects.filter(status='active', is_temporary=False)\
                 .order_by('-created_at')[:page_size]\
                 .values('id', 'name', 'sku', 'price', 'sale_price')
 
@@ -244,7 +244,7 @@ def search_products_and_variants(request):
                 models.Q(name_lower__contains=query_lower) |
                 models.Q(sku_lower__contains=query_lower) |
                 models.Q(description_lower__contains=query_lower),
-                is_active=True
+                status='active'
             ).annotate(
                 relevance=Case(
                     When(name_lower=query_lower, then=3),
@@ -259,7 +259,7 @@ def search_products_and_variants(request):
                 models.Q(name__icontains=query_normalized) |
                 models.Q(sku__icontains=query_normalized) |
                 models.Q(description__icontains=query_normalized),
-                is_active=True
+                status='active'
             ).annotate(
                 relevance=Case(
                     When(name__iexact=query_normalized, then=3),
@@ -310,7 +310,7 @@ def search_products_and_variants(request):
                 models.Q(name_lower__contains=query_lower) |
                 models.Q(sku_lower__contains=query_lower) |
                 models.Q(description_lower__contains=query_lower),
-                is_active=True,
+                status='active',
                 is_temporary=False
             ).annotate(
                 relevance=Case(
@@ -325,7 +325,7 @@ def search_products_and_variants(request):
                 models.Q(name__icontains=query_normalized) |
                 models.Q(sku__icontains=query_normalized) |
                 models.Q(description__icontains=query_normalized),
-                is_active=True,
+                status='active',
                 is_temporary=False
             ).annotate(
                 relevance=Case(
@@ -498,7 +498,7 @@ def validate_kit_cost(request):
             elif variant_group_id:
                 try:
                     variant_group = ProductVariantGroup.objects.get(id=variant_group_id)
-                    product = variant_group.products.filter(is_active=True).first()
+                    product = variant_group.products.filter(status='active').first()
                     if variant_group:
                         product_name = f"[Варианты] {variant_group.name}"
                 except ProductVariantGroup.DoesNotExist: