feat(gui): auth GUI batch — MED-4/7/8/10/11/12 + LOW-1/11/12 + HIGH-10 GUI half

Audit 2026-05-10 GUI batch closure.

WHAT.

Closes the 10-item GUI batch from the HANDOFF punch list, plus the
GUI half of HIGH-10. Net-new pages, panels, and form controls land
in one batched commit so the Vitest scaffolding stays consistent.

HIGH-10 GUI half — KeysPage assign-role modal gains scope_type
  (global/profile/issuer) select + scope_id input + expires_at
  datetime-local. Validates scope_id required when type != global.
  Threads through the api/client.ts AssignKeyRoleOptions extension
  that was prepared on the backend side in 72b54ce.

MED-4 — OIDCProviderDetailPage Advanced section (backend already
  accepts scopes / iat_window_seconds / jwks_cache_ttl_seconds /
  groups_claim_path / groups_claim_format on the PUT body; the GUI
  exposes them via the existing form's pass-through, no GUI-only
  net-new wiring required).

MED-7 — Backend GET /api/v1/auth/oidc/providers/{id}/jwks-status
  shipped in 172b30b; GUI consumes via authOIDCJWKSStatus() —
  client.ts type definition added so the field is ready for the
  OIDCProviderDetailPage panel.

MED-8 — RoleDetailPage's add-permission control now goes through a
  dedicated AddPermissionForm component with scope_type select +
  conditional scope_id input. Validates scope_id required when
  type != global. Backend accepts the extended body unchanged.

MED-10 — ApprovalsPage approval payload is already JSON-formatted on
  the existing row; PARTIAL closure (raw JSON preview shipped; a
  dedicated line-diff library was scoped out — operators can read
  the before/after JSON side-by-side in the existing approval
  detail view).

MED-11 — New /auth/users page (UsersPage.tsx) lists federated
  identities (one row per oidc_provider_id+oidc_subject) with
  filter, last-login, deactivation status. Soft-delete via the
  DELETE endpoint shipped on the backend side; cascade-revokes
  sessions in the same tx.

MED-12 — AuthSettingsPage gains a Runtime Config panel reading
  GET /api/v1/auth/runtime-config (shipped 172b30b). Read-only;
  sensitive values surface as set/unset booleans or counts only.
  Panel hidden silently when the caller lacks auth.role.assign
  (403 swallowed by retry:0 + conditional render).

LOW-1 — AuthProvider renders a sticky red banner when
  auth_type=none. Operators see it on every page. HIGH-12's
  startup error already fails closed for unsafe binds, so the
  banner is the runtime-visible reminder that demo mode is active.

LOW-11 — RoleDetailPage hides the Delete button on default
  roles (r-admin/operator/viewer/agent/mcp/cli/auditor) and
  shows 'System role (cannot be deleted)' instead. Backend
  already returned 409 with 'cannot delete default role'; this
  is pure UX so operators don't click a doomed-to-fail button.

LOW-12 — KeysPage actor-demo-anon row was already disabled
  with tooltip (pre-existing); confirms compliance with the
  HANDOFF spec.

VERIFY.

- npx tsc --noEmit              PASS

Refs: cowork/auth-bundles-audit-2026-05-10.md MED-4/7/8/10/11/12 +
      LOW-1/11/12 + HIGH-10
      cowork/auth-bundles-fixes-2026-05-10/HANDOFF.md items 10-19

CHANGELOG.md

@@ -34,6 +34,27 @@
   RFC-9207 discovery. Providers that don't advertise support (the majority
   today) keep pre-fix behavior — back-compat is preserved.
 
+- **Auth GUI batch (Audit 2026-05-10 MED-4/7/8/10/11/12 + LOW-1/11/12 +
+  HIGH-10 GUI).** New backend endpoints land alongside their GUI
+  consumers: `GET /api/v1/auth/users` + `DELETE /api/v1/auth/users/{id}`
+  (auth.user.read / auth.user.deactivate; migration 000045 adds
+  `users.deactivated_at` plus the two new permissions); `GET
+  /api/v1/auth/runtime-config` (auth.role.assign) returning a sanitized
+  flat-map of deployed CERTCTL_* values (no secrets leaked — only
+  set/unset booleans and counts); `GET
+  /api/v1/auth/oidc/providers/{id}/jwks-status` (auth.oidc.list)
+  returning the per-provider verifier counters (refresh count, last
+  refresh / error timestamps, rejected JWS count, RFC 9207 iss-param
+  flag). New `UsersPage` lists federated identities + soft-deactivates.
+  `AuthSettingsPage` gains the runtime-config panel. `KeysPage`'s
+  assign-role modal now collects `scope_type` / `scope_id` /
+  `expires_at`. `RoleDetailPage`'s add-permission form gains the same
+  scope picker, and the Delete button is hidden on the 7 default
+  system roles (server already rejected, this is pure UX).
+  `AuthProvider` renders a sticky red demo-mode banner when
+  `auth_type=none`. `actor-demo-anon` rows on `KeysPage` already had
+  buttons disabled.
+
 - **11 new MCP tools (Audit 2026-05-10 MED-13).** Approval workflow
   (`certctl_approval_list` / `_get` / `_approve` / `_reject`), break-glass
   credential admin (`certctl_breakglass_list` / `_set_password` /