Initial commit - Zhangmenu Django project

A menu management application built with Django, featuring:
- Dish management with cover images
- Order system with party dates and participants
- REST API with Django REST Framework
- Bootstrap-styled frontend

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

menu/services/dish_service.py

@@ -0,0 +1,25 @@
+from django.db.models import F
+from menu.models import Dish
+
+
+class DishService:
+    """菜品业务逻辑"""
+
+    @staticmethod
+    def get_queryset(category_id=None, search=None):
+        """获取菜品查询集"""
+        queryset = Dish.objects.select_related('category')
+
+        if category_id:
+            queryset = queryset.filter(category_id=category_id)
+        if search:
+            queryset = queryset.filter(name__icontains=search)
+
+        return queryset
+
+    @staticmethod
+    def increment_view_count(dish):
+        """增加浏览次数"""
+        Dish.objects.filter(pk=dish.pk).update(view_count=F('view_count') + 1)
+        dish.refresh_from_db(fields=['view_count'])
+        return dish