Initial commit: React + Django 城市手册项目

- Django 4.2 + DRF + JWT + GraphQL
- React 18 + MobX + styled-components
- PostgreSQL 数据库
- Docker + Docker Compose + Nginx
- 完整的功能模块（用户、版块、文章、服务、交互、版主管理）
- 完整的文档（需求、部署、测试）

backend/apps/users/serializers.py

@@ -0,0 +1,38 @@
+from rest_framework import serializers
+from .models import User
+
+
+class UserSerializer(serializers.ModelSerializer):
+    """Serializer for User model (basic info)."""
+
+    class Meta:
+        model = User
+        fields = ('id', 'username', 'email', 'first_name', 'last_name', 'avatar', 'role', 'status')
+        read_only_fields = ('id', 'role', 'status')
+
+
+class UserDetailSerializer(serializers.ModelSerializer):
+    """Detailed serializer for User model."""
+
+    class Meta:
+        model = User
+        fields = '__all__'
+        read_only_fields = ('id', 'date_joined', 'last_login')
+
+
+class UserUpdateSerializer(serializers.ModelSerializer):
+    """Serializer for updating user profile."""
+
+    class Meta:
+        model = User
+        fields = ('first_name', 'last_name', 'avatar')
+
+
+class UserStatsSerializer(serializers.Serializer):
+    """Serializer for user statistics."""
+    articles_count = serializers.IntegerField()
+    services_count = serializers.IntegerField()
+    comments_count = serializers.IntegerField()
+    likes_count = serializers.IntegerField()
+    favorites_count = serializers.IntegerField()
+    ratings_count = serializers.IntegerField()