# 3.6 — Frontend: wave columns + resource tree (GREEN)

Phase: 3 — Delivery Tree (Surface E)
Stage: GREEN

Depends on: [3.2](3.2-delivery-component-test.md), [3.4](3.4-api-delivery.md), [3.5](3.5-api-delivery-resources.md)

- [ ] Frontend: React Flow, wave columns left->right from a deployment-wave field. Click app -> side panel with `react-arborist` virtualized resource tree, lazy-loaded children
- [ ] Fetch from [/api/delivery](../app/api/delivery/route.ts) and [/api/delivery/{app}/resources](<../app/api/delivery/[app]/resources/route.ts>) (mock) instead of importing `clusterMock` directly