Adds a CLI command that registers this install as a self-hosted dashboard
with the user's Nous Portal account, automating the manual browser flow on
/local-dashboards.
- New hermes_cli/dashboard_register.py: resolves a fresh Nous access token
from auth.json (fast-fails with a `hermes setup` hint when not logged in),
POSTs to {portal}/api/oauth/self-hosted-client, and writes
HERMES_DASHBOARD_OAUTH_CLIENT_ID into ~/.hermes/.env idempotently.
- Docker-style adjective_noun auto-naming; --name and --redirect-uri overrides.
- Persists HERMES_DASHBOARD_PORTAL_URL only when non-default and unset (so a
Vercel preview / staging portal sticks, prod default stays implicit).
- Refuses in managed/hosted installs (the orchestrator stamps the client_id).
- Post-register hint explains the OAuth gate only engages on a non-loopback bind.
- Nested 'register' subparser leaves bare `hermes dashboard` unchanged.
- 9 unit tests (name gen, fast-fails, POST shape, env writes, redirect URI,
portal-URL persistence, 401/403 mapping); dashboard lifecycle tests still green.
Depends on NousResearch/nous-account-service#324 (the portal endpoint).
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