Remove dashboard from sidebar

src/lib/sidebarItems.tsx

@@ -1,5 +1,4 @@
 import {
-  Activity,
   Award,
   BadgeCheck,
   Bell,
@@ -194,7 +193,6 @@ export const SIDEBAR_ITEMS: SidebarItemDef[] = [
   { id: "badges", label: "Badges", path: "/badges", icon: Award },
   { id: "communities", label: "Communities", path: "/communities", icon: Users },
   { id: "world", label: "World", path: "/world", icon: Earth },
-  { id: "dashboard", label: "Dashboard", path: "/dashboard", icon: Activity },
 ];
 
 /** Set of all known sidebar item IDs for quick lookup. */