The sidebar rendered /dashboard twice: once as a hardcoded NavItem
(lines 45-50) and again via navItems.map() (navItems[0] is also
/dashboard). Dropped the hardcoded item so the single source of truth
(navItems in lib/navigation.ts) drives the rail. Removed the now-unused
LayoutDashboard import.
tsc + biome green.
Co-Authored-By: Claude Opus 5 (Nous Research)