The default-allow-GET fix in route_checks unblocked the route layer, but a
second class of bug remained: handlers that gate on `user_role !=
PROXY_ADMIN` (or a private `_require_proxy_admin` helper) reject admin
viewer at the handler before the route's HTTP method even matters.
Backend: relax handler role checks on read endpoints to allow
PROXY_ADMIN_VIEW_ONLY (same `_user_has_admin_view` helper used elsewhere).
- /v1/access_group GET (list) + /v1/access_group/{id} GET — split
`_require_proxy_admin` into a parallel `_require_admin_view` for the
two read handlers; writes (POST / PUT / DELETE) keep the strict gate.
- /cloudzero/settings GET, /vantage/settings GET — read-only views.
- /config_overrides/hashicorp_vault GET — read-only config view.
- /team/permissions_list GET — let admin viewer see permissions like
a Proxy Admin would.
- /jwt/key/mapping/list, /jwt/key/mapping/info — JWT mapping reads.
- /v1/mcp/discover, /v1/mcp/openapi-registry — MCP picker views.
- /schedule/anthropic_beta_headers_reload/status — read-only status.
- /adaptive_router/state — read-only live snapshot.
UI: hide write buttons that admin viewer should not see (button click
would fail the backend write gate, but the UX expectation is no button).
- Internal Users: hide "Invite User" button.
- Access Groups: hide "Create Access Group" + Delete row action.
- Budgets: hide "+ Create Budget" + Edit/Delete row actions.
- Prompts: hide "+ Add New Prompt" / "Upload .prompt File"; gate the
prompt-table Edit/Delete actions on `isProxyAdminRole` (was
`isAdminRole` which incorrectly included admin viewer).
- Router Settings → Fallbacks: hide AddFallbacks panel + per-row Test
+ Delete actions.
- AI Hub: hide "Select Models / Agents / MCP Servers / Skills to Make
Public" + "Useful Links Management" (writes).
These pages remain VISIBLE for admin viewer (read parity); only the
write entry points are hidden.
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