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_inventory_fifo.py

@@ -0,0 +1,113 @@
+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, StockBatch, Incoming, Sale
+
+# Переключаемся в grach
+grach = Client.objects.get(schema_name='grach')
+connection.set_tenant(grach)
+
+print("=== FIFO Inventory Test ===\n")
+
+# 1. Проверяем, есть ли товары
+products = Product.objects.all()
+if not products.exists():
+    print("ERROR: No products in grach!")
+    sys.exit(1)
+
+product = products.first()
+print(f"Using product: {product.name} (ID: {product.id})\n")
+
+# 2. Создаём или получаем склад
+warehouse, created = Warehouse.objects.get_or_create(
+    name='Main Warehouse',
+    defaults={'location': 'Default Location', 'is_active': True}
+)
+print(f"Warehouse: {warehouse.name} ({'created' if created else 'exists'})\n")
+
+# 3. Создаём 3 прихода с разными ценами (FIFO тест)
+print("Creating incoming batches...")
+
+incoming1 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('10'),
+    cost_price=Decimal('100.00'),
+    notes='Batch 1 - oldest'
+)
+print(f"  Batch 1: qty=10, price=100 (created: {incoming1.created_at})")
+
+incoming2 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('15'),
+    cost_price=Decimal('120.00'),
+    notes='Batch 2 - middle'
+)
+print(f"  Batch 2: qty=15, price=120 (created: {incoming2.created_at})")
+
+incoming3 = Incoming.objects.create(
+    product=product,
+    warehouse=warehouse,
+    quantity=Decimal('20'),
+    cost_price=Decimal('150.00'),
+    notes='Batch 3 - newest'
+)
+print(f"  Batch 3: qty=20, price=150 (created: {incoming3.created_at})\n")
+
+# 4. Проверяем StockBatches
+batches = StockBatch.objects.filter(product=product, warehouse=warehouse).order_by('created_at')
+print(f"StockBatches created: {batches.count()}")
+for batch in batches:
+    print(f"  - qty={batch.quantity}, price={batch.cost_price}, created={batch.created_at}")
+
+print("\n--- Creating Sale ---\n")
+
+# 5. Создаём продажу на 18 единиц (должна взять из batch1 (10) + batch2 (8))
+try:
+    sale = Sale.objects.create(
+        product=product,
+        warehouse=warehouse,
+        quantity=Decimal('18'),
+        sale_price=Decimal('200.00'),
+        notes='Test sale for FIFO'
+    )
+    print(f"Sale created: qty=18, price=200\n")
+    
+    # 6. Проверяем SaleBatchAllocation (как батчи были распределены)
+    from inventory.models import SaleBatchAllocation
+    
+    allocations = SaleBatchAllocation.objects.filter(sale=sale).order_by('batch__created_at')
+    print(f"SaleBatchAllocations ({allocations.count()}):")
+    
+    total_allocated = Decimal('0')
+    for alloc in allocations:
+        print(f"  - Batch (created {alloc.batch.created_at.strftime('%H:%M:%S')}): qty={alloc.quantity}, cost={alloc.batch.cost_price}")
+        total_allocated += alloc.quantity
+    
+    print(f"\nTotal allocated: {total_allocated}")
+    
+    if total_allocated == Decimal('18'):
+        print("✓ FIFO allocation correct!")
+    else:
+        print(f"✗ ERROR: Expected 18, got {total_allocated}")
+    
+except Exception as e:
+    print(f"ERROR creating sale: {str(e)}")
+    import traceback
+    traceback.print_exc()
+
+# 7. Проверяем оставшиеся батчи
+print("\n--- Remaining Stock ---\n")
+remaining_batches = StockBatch.objects.filter(product=product, warehouse=warehouse).order_by('created_at')
+for batch in remaining_batches:
+    print(f"  - Batch qty={batch.quantity}, active={batch.is_active}")