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

web/package.json

@@ -9,11 +9,16 @@
     "preview": "vite preview"
   },
   "dependencies": {
+    "axios": "^1.7.0",
     "react": "^19.0.0",
-    "react-dom": "^19.0.0"
+    "react-dom": "^19.0.0",
+    "react-router-dom": "^7.0.0"
   },
   "devDependencies": {
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
     "@vitejs/plugin-react": "^4.3.0",
+    "typescript": "^5.6.0",
     "vite": "^6.0.0"
   }
 }