Удалена система лояльности из модели Customer

Удалены поля loyalty_tier, is_vip, get_loyalty_discount(), increment_total_spent().
Поле total_spent оставлено для будущего расчёта по заказам.
Обновлены admin, forms, views и шаблоны.

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

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

myproject/customers/forms.py

@@ -14,7 +14,7 @@ class CustomerForm(forms.ModelForm):
 
     class Meta:
         model = Customer
-        fields = ['name', 'email', 'phone', 'loyalty_tier', 'notes']
+        fields = ['name', 'email', 'phone', 'notes']
         exclude = ['is_system_customer']
         widgets = {
             'notes': forms.Textarea(attrs={'rows': 3}),
@@ -30,12 +30,6 @@ class CustomerForm(forms.ModelForm):
             if field_name == 'notes':
                 # Textarea already has rows=3 from widget, just add class
                 field.widget.attrs.update({'class': 'form-control'})
-            elif field_name == 'loyalty_tier':
-                # Select fields need form-select class
-                field.widget.attrs.update({'class': 'form-select'})
-            elif field_name == 'phone':
-                # Phone field gets form-control class
-                field.widget.attrs.update({'class': 'form-control'})
             else:
                 # Regular input fields get form-control class
                 field.widget.attrs.update({'class': 'form-control'})