- Убрать remaining_amount и utilization_percentage из list_display (это @property) - Добавить методы get_remaining_amount и get_utilization_percentage - Защитить от None в allocated_amount - Исправить prefetch_related в views_frontend
- Stage 1: 8 models with admin interface (20/20 tests) - Stage 2: REST API with 50+ endpoints (6/12 tests) - Stage 3: django-fsm workflow with notifications (1/9 tests) - Known issue: items_count property conflicts with annotate()
