fix: Улучшения системы ценообразования комплектов

Исправлены 4 проблемы:
1. Расчёт цены первого товара - улучшена валидация в getProductPrice и calculateFinalPrice
2. Отображение actual_price в Select2 вместо обычной цены
3. Количество по умолчанию = 1 для новых форм компонентов
4. Auto-select текста при клике на поле количества для удобства редактирования

Изменённые файлы:
- products/forms.py: добавлен __init__ в KitItemForm для quantity.initial = 1
- products/templates/includes/select2-product-init.html: обновлена formatSelectResult
- products/templates/productkit_create.html: добавлен focus handler для auto-select
- products/templates/productkit_edit.html: добавлен focus handler для auto-select

🤖 Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

test_fifo.py

@@ -0,0 +1,105 @@
+import os
+import sys
+import django
+from decimal import Decimal
+
+sys.path.insert(0, 'C:/Users/team_/Desktop/test_qwen/myproject')
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'myproject.settings')
+django.setup()
+
+from tenants.models import Client
+from django.db import connection
+from products.models import Product
+from inventory.models import Warehouse, Incoming, Sale, SaleBatchAllocation, StockBatch
+
+# Переключаемся в grach
+grach = Client.objects.get(schema_name='grach')
+connection.set_tenant(grach)
+
+print("=== FIFO Test ===\n")
+
+# Получаем товар и склад
+product = Product.objects.get(sku='FLOWER-001')
+warehouse = Warehouse.objects.get(name='Main Warehouse')
+
+print("Step 1: Creating 3 incoming batches\n")
+
+# Создаём 3 прихода
+incoming1 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('10'),
+    cost_price=Decimal('100.00')
+)
+print("  Incoming 1: qty=10, cost=100.00")
+
+incoming2 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('15'),
+    cost_price=Decimal('120.00')
+)
+print("  Incoming 2: qty=15, cost=120.00")
+
+incoming3 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('20'),
+    cost_price=Decimal('150.00')
+)
+print("  Incoming 3: qty=20, cost=150.00\n")
+
+print("Step 2: Checking StockBatches\n")
+
+batches = StockBatch.objects.filter(product=product, warehouse=warehouse).order_by('created_at')
+print("StockBatches count: {}\n".format(batches.count()))
+
+for i, batch in enumerate(batches, 1):
+    print("  Batch {}: qty={}, cost={}, active={}".format(i, batch.quantity, batch.cost_price, batch.is_active))
+
+print("\nStep 3: Creating Sale (qty=18)\n")
+
+try:
+    sale = Sale.objects.create(
+        product=product,
+        warehouse=warehouse,
+        quantity=Decimal('18'),
+        sale_price=Decimal('250.00')
+    )
+    print("Sale created: qty=18, price=250.00\n")
+    
+    print("Step 4: Checking SaleBatchAllocations\n")
+    
+    allocations = SaleBatchAllocation.objects.filter(sale=sale).order_by('batch__created_at')
+    total = Decimal('0')
+    
+    for i, alloc in enumerate(allocations, 1):
+        print("  Allocation {}: qty={}, batch_cost={}".format(i, alloc.quantity, alloc.batch.cost_price))
+        total += alloc.quantity
+    
+    print("\nTotal allocated: {}".format(total))
+    
+    if total == Decimal('18'):
+        print("PASS: Correct total")
+    else:
+        print("FAIL: Expected 18, got {}".format(total))
+    
+    # Check FIFO order
+    expected_order = [Decimal('10'), Decimal('8')]
+    actual_order = [alloc.quantity for alloc in allocations]
+    
+    if actual_order == expected_order:
+        print("PASS: FIFO order correct (batch1 10 + batch2 8)")
+    else:
+        print("FAIL: Expected {}, got {}".format(expected_order, actual_order))
+    
+except Exception as e:
+    print("ERROR: {}".format(str(e)))
+    import traceback
+    traceback.print_exc()
+
+print("\nStep 5: Checking remaining stock\n")
+
+remaining = StockBatch.objects.filter(product=product, warehouse=warehouse).order_by('created_at')
+for i, batch in enumerate(remaining, 1):
+    print("  Batch {}: qty={}, active={}".format(i, batch.quantity, batch.is_active))