feat: scaffold unibus_admin gateway (Go REST + embed SPA placeholder)

Single Go binary: serves an embedded Mantine SPA and a small REST API over the
unibus control plane. Holds the operator ADMIN identity, signs every
control-plane request, never exposes a private key to the browser.

- internal/admin: Repo interface + mock + bus implementations, REST server
- repo_bus: rooms via pkg/client, members via signed GET (CanonicalRequest +
  SignEd25519), cluster via /healthz (CA-pinned), users via membership.Store
- identity loaded from pass entry or 0600 file (operator-identity JSON)
- go build CGO_ENABLED=0 green; go vet clean

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

This commit is contained in:

Egutierrez

2026-06-07 19:27:49 +02:00

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				<!doctype html><title>unibus_admin</title><p>build pending</p>

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