feat: add user authentication with separate login and register pages

- Custom User model with email as unique identifier (AUTH_USER_MODEL)

- POST /api/auth/register/ with email validation, password min 8 chars, duplicate rejection

- POST /api/auth/login/ returning JWT (access + refresh) tokens

- Passwords hashed via Django's make_password

- React LoginPage and RegisterPage with form validation

- AuthContext with useReducer for auth state management

- Axios API client with JWT token injection

- TypeScript conversion of frontend scaffold

api/project/urls.py

@@ -1,4 +1,6 @@
 from django.contrib import admin
-from django.urls import path
+from django.urls import include, path
 
-urlpatterns: list = []
+urlpatterns: list = [
+    path("api/auth/", include("accounts.urls", namespace="accounts")),
+]