feat(plugins): console-hosted plugin UI surface (host registry + SDK servePluginUi + console proxy/nav)
Implements planning/design/plugin-ui-surface.md (U1-U3):
- host: in-memory lease-based plugin registry (mgmt/plugins.rs) — PUT/GET/DELETE
/api/v1/plugins + GET /plugins/{id}/ui-credential; bearer+loopback only (not on
the mTLS read-only allowlist); plugins.changed event; port-only registration
(proxy always dials 127.0.0.1); secret never in the listing.
- sdk: servePluginUi — loopback ephemeral bind + per-boot secret + constant-time
check + /__health + static/SPA-fallback + register/renew(30s)/deregister via
pf.request (skew-proof, D7). Example + tests.
- console: /plugin-ui/{id}/** reverse proxy (server-side secret injection, cookie
strip, SSE streaming, stale-secret 401-retry) + credential cache; BFF denylist
for the credential endpoint; dynamic Plugins nav (desktop + mobile) fed by a
polled list; iframe-in-shell page with health probe, offline card, open-in-tab,
deep-link sync. Dev-mode /plugin-ui middleware in vite.config.ts.
OpenAPI regen for the new endpoints follows in the next commit (built on Linux).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
enricobuehler
ec84b30eae