Cleanup header navigation: remove redundant dashboard link from profile menu

src/components/UserHeader.tsx

@@ -182,12 +182,7 @@ export function UserHeader({ user, preferences }: UserHeaderProps) {
               </button>
             </DropdownMenuTrigger>
             <DropdownMenuContent align="end" sideOffset={8}>
-              <DropdownMenuItem onClick={() => handleNavigate('/')}>
-                <Home className="mr-3 h-4 w-4 text-muted-foreground" />
-                <span>Dashboard</span>
-              </DropdownMenuItem>
 
-              <DropdownMenuSeparator />
               <DropdownMenuItem onClick={handleLogout} className="text-red-400 hover:text-red-300">
                 <LogOut className="mr-3 h-4 w-4" />
                 <span>Sign out</span>