### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### The Feature

Add an admin setting under **Settings → Admin Settings → UI Settings** that allows proxy admins to configure which usage view options are visible to non-admin internal users in the Usage page dropdown.

Currently, the Usage page dropdown shows these options to `internal_user` / `internal_user_viewer` roles:

- **Your Usage** (`global` with `showForNonAdmin` label) - **Your Organization Usage** (`organization` with `showForNonAdmin` label) - **Team Usage** (`team`) - **Tag Usage** (`tag` — has `adminOnly: true` but is overridden by a `canViewTagUsage` check that includes all `internalUserRoles`)

The proposal is to add a configuration — both in the Admin UI (alongside the existing "Configure Page Visibility" panel) and via the `PATCH /ui_settings/update` API — that lets admins select which of these dropdown options internal users can see.

**Admin UI:** A new section in UI Settings (e.g., "Configure Usage View Visibility") with checkboxes for each usage view option, similar to how page visibility is already configured.

**API:** Extend the existing…