Add API root endpoint for /api/users/

Added UsersAPIRoot view that returns available user-related
endpoints when accessing /api/users/ directly.

All API endpoint groups now have discoverable root endpoints:
- /api/ - Main API root
- /api/users/ - User endpoints
- /api/tasks/ - Task endpoints (already had TaskListCreateAPIView)
- /api/sync/ - Sync endpoints (already had sync view)
- /api/notifications/ - Notification endpoints (already had NotificationListAPIView)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

users/views.py

@@ -31,6 +31,25 @@ User = get_user_model()
 # API Views
 # =============================================================================
 
+class UsersAPIRoot(APIView):
+    """API root for users endpoints."""
+    permission_classes = [permissions.AllowAny]
+
+    def get(self, request):
+        return Response({
+            'endpoints': {
+                'register': '/api/users/register/',
+                'login': '/api/users/token/',
+                'refresh_token': '/api/users/token/refresh/',
+                'verify_email': '/api/users/verify-email/',
+                'resend_verification': '/api/users/resend-verification/',
+                'profile': '/api/users/profile/',
+                'change_password': '/api/users/change-password/',
+                'devices': '/api/users/devices/',
+            }
+        })
+
+
 class RegisterAPIView(generics.CreateAPIView):
     """API endpoint for user registration."""