fix(users): support profile picture delete and dev sms fallback

apps/users/tests/test_profile_picture_api.py

@@ -0,0 +1,18 @@
+from rest_framework import status
+from rest_framework.test import APIClient
+
+from apps.users.models import User
+
+
+def test_profile_picture_delete_returns_profile_payload(db):
+    user = User.objects.create_user(mobile="09120000000", password="secret123")
+    client = APIClient()
+    client.force_authenticate(user=user)
+
+    response = client.delete("/api/users/profile/picture/")
+
+    assert response.status_code == status.HTTP_200_OK
+    assert response.data["profile_picture"] is None
+
+    user.refresh_from_db()
+    assert not user.profile_picture