Replace 'конец' with 'исход сделки' in order status terminology

Updated terminology across the order status management system to use 'исход сделки' (deal outcome) instead of 'конец' (end) for better clarity and professional language.

Changes:
- Fixed AttributeError in order_status_list view by removing attempt to set read-only property orders_count
- Updated OrderStatus model verbose_name fields for is_positive_end and is_negative_end
- Updated status form template badges and preview JavaScript
- Updated status list table header
- Created migration for verbose_name changes

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

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

myproject/orders/migrations/0004_alter_orderstatus_is_negative_end_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.0.10 on 2025-11-13 18:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('orders', '0003_update_status_names_to_russian'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='orderstatus',
+            name='is_negative_end',
+            field=models.BooleanField(default=False, help_text='True если это финальный отрицательный статус (Отменен)', verbose_name='Отрицательный исход сделки'),
+        ),
+        migrations.AlterField(
+            model_name='orderstatus',
+            name='is_positive_end',
+            field=models.BooleanField(default=False, help_text='True если это финальный успешный статус (Выполнен)', verbose_name='Положительный исход сделки'),
+        ),
+    ]