Refactor user account system and remove moderation integration

- Remove first_name and last_name fields from User model
- Add user deletion and social provider services
- Restructure auth serializers into separate directory
- Update avatar upload functionality and API endpoints
- Remove django-moderation integration documentation
- Add mandatory compliance enforcement rules
- Update frontend documentation with API usage examples

backend/apps/api/v1/auth/serializers.py

@@ -18,7 +18,7 @@ from django.utils.crypto import get_random_string
 from django.contrib.auth import get_user_model
 from django.utils import timezone
 from datetime import timedelta
-from .models import PasswordReset
+from apps.accounts.models import PasswordReset
 
 
 UserModel = get_user_model()
@@ -62,8 +62,7 @@ class ModelChoices:
                 "id": 1,
                 "username": "john_doe",
                 "email": "john@example.com",
-                "first_name": "John",
-                "last_name": "Doe",
+                "display_name": "John Doe",
                 "date_joined": "2024-01-01T12:00:00Z",
                 "is_active": True,
                 "avatar_url": "https://example.com/avatars/john.jpg",
@@ -83,12 +82,10 @@ class UserOutputSerializer(serializers.ModelSerializer):
             "id",
             "username",
             "email",
-            "first_name",
-            "last_name",
+            "display_name",
             "date_joined",
             "is_active",
             "avatar_url",
-            "display_name",
         ]
         read_only_fields = ["id", "date_joined", "is_active"]
 
@@ -127,7 +124,8 @@ class LoginInputSerializer(serializers.Serializer):
 class LoginOutputSerializer(serializers.Serializer):
     """Output serializer for successful login."""
 
-    token = serializers.CharField()
+    access = serializers.CharField()
+    refresh = serializers.CharField()
     user = UserOutputSerializer()
     message = serializers.CharField()
 
@@ -149,14 +147,14 @@ class SignupInputSerializer(serializers.ModelSerializer):
         fields = [
             "username",
             "email",
-            "first_name",
-            "last_name",
+            "display_name",
             "password",
             "password_confirm",
         ]
         extra_kwargs = {
             "password": {"write_only": True},
             "email": {"required": True},
+            "display_name": {"required": True},
         }
 
     def validate_email(self, value):
@@ -202,7 +200,8 @@ class SignupInputSerializer(serializers.ModelSerializer):
 class SignupOutputSerializer(serializers.Serializer):
     """Output serializer for successful signup."""
 
-    token = serializers.CharField()
+    access = serializers.CharField()
+    refresh = serializers.CharField()
     user = UserOutputSerializer()
     message = serializers.CharField()