plans: add Hermes resident agent plan, make agent chat the control-room home view

Hermes becomes an LLM-backed agent loop (hand-rolled tool loop over the
existing mcpClient, not the public MCP connector), with Postgres-backed
sessions, SSE chat streaming, and Authentik-gated /agent routing. The
control-room plan is amended to make the chat the main entry point.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

plans/2026-07-08-control-room-webui.md

@@ -115,6 +115,13 @@ New endpoints (spec-first in `api/openapi.yaml`, regen, then implement):
 Persistent nav + live top status strip (health dots, open-signal badge,
 pending-approval badge):
 
+0. **Agent chat (home view)** — *amendment 2026-07-08, see the
+   [Hermes resident agent plan](2026-07-08-hermes-resident-agent.md)*: the
+   default view at `/ui/#/` is a conversation with the resident Hermes agent
+   (streamed via `/agent/chat`), with a live right rail showing pending
+   approvals (decidable in place), recent events, and health. A persistent
+   chat drawer is reachable from every other page. Lands with resident-agent
+   milestone H3; until then, Overview is the home view.
 1. **Overview** — summary cards from `/dashboard/summary`, event-rate
    sparkline, live event ticker, top degraded entities.
 2. **Graph explorer** — d3-force over `/graph`; node color = health; filters