(plan) convert original implement plan to mock api

tasks/5.17-simplify-pass.md

@@ -3,23 +3,19 @@
 Phase: 5 — Chat + Rate Limiter (Surface D)
 Stage: REFACTOR
 
-Depends on: [5.8](5.8-rate-limiting-tier3.md), [5.13](5.13-frontend-chat-component.md)
+Depends on: [5.7](5.7-api-chat.md), [5.13](5.13-frontend-chat-component.md)
 
-- [ ] `simplify` pass on rate limiter + SSE chat handler
+- [ ] `simplify` pass on the mock SSE chat route + frontend chat component
 
 ## Verify
 
 ```bash
-# load test at 20 concurrent clients
-# GPU sequence usage never exceeds 6, no upstream 5xx, queue drains
 pnpm test:e2e chat.e2e.ts   # required, must pass before merge
 ```
 
-## Done — atlas v1 shipped
+## Done — Next.js portfolio surfaces shipped (mock-backed)
 
-Success criteria (from PLAN-atlas.md):
-- [ ] Protected services redirect unauthenticated to Authentik (if still applicable post decision #3)
-- [ ] Fabricated stats gone, real numbers or removed
-- [ ] `riotpiao.com` is the only public hostname (I1 held)
-- [ ] Golden redaction test passes against live-cluster fixture
-- [ ] Load test: 20 concurrent clients, GPU usage <= 6, no 5xx, queue drains
+- [ ] Fabricated stats gone, real numbers or removed ([3.10](3.10-landing-page-cleanup.md))
+- [ ] All four cluster surfaces (topology, delivery, terminal, chat) fetch from `/api/*` mock routes, not static `clusterMock` imports
+- [ ] `pnpm test` and `pnpm test:e2e` both pass
+- [ ] See [REQUIREMENTS.md](REQUIREMENTS.md) for what a real backend needs to implement before these mocks can be swapped for the genuine atlas service