Extends the branding service with a hiddenNavHrefs: string[] field so
forks can hide sidebar entries (e.g. /salary, /customers) without
patching DashboardNav.tsx. Configurable via NEXT_PUBLIC_BRANDING_HIDDEN_NAV
as a comma-separated list. Default is [] — vanilla gnubok unchanged.
Routes remain reachable; this is a nav-visibility switch only. Settings
sidebar is intentionally out of scope.
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>