Option B: a lightweight reorder / show-hide list for the desktop header.
- useDesktopNavPreferences: separate localStorage-backed preference for which
catalog items appear as primary top-nav tabs and their order (Map fixed
first, no hard slot cap). Reuses the shared NAV_CATALOG.
- DesktopNavManager: settings UI to reorder primary tabs (up/down) and toggle
items between the top bar and the "More" menu; Map locked; reset to default.
- Layout desktop header now renders fixed Map + user's primary tabs, and the
"More" dropdown dynamically lists the hidden catalog items (auth-gated),
so each item appears in exactly one place.
- Manager shown only on md+ screens (mobile uses the bottom-bar customizer).
Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>
