- The Other nav entry is hidden while the feature is off
(nav-item--hidden, toggled client-side after enabling) and now uses the
fa-shapes icon.
- Shared utils/otherModels.js helpers (enable through the settings API,
open the settings Library section) are reused by the disabled page, the
announcement banner and the download modal.
- BannerService registers a one-time dismissible "other-models-announcement"
banner while the feature is off; SettingsManager drops the banner and
updates the nav when the master switch flips.
- A disabled download routing answer now surfaces a showActionToast with an
"Enable Other Models" action.
- Settings UI: master toggle + five sub_type checkboxes whose default-root
selects are disabled when unchecked; i18n keys added to en.json and synced
(other locales keep TODO placeholders).
Adds a 'Keep Action Bar Visible' toggle (default off) under
Settings > Interface > Layout Settings. When enabled, the controls bar
(Refresh, Download, etc.) and the breadcrumb nav are wrapped in a shared
sticky container (.sticky-topbar) so both stay pinned as one unit; when
disabled, the wrapper is display: contents and the original behavior
(only the breadcrumb stays visible) is preserved.