demo login, super admin view, password reset

- Landing page: 'Try the Demo' button links to /login?demo=1
- Login page: 'Try the Demo — no signup needed' button auto-logs in as demo@pnpl.app
- /login?demo=1: auto-triggers demo login on page load
- Super Admin page (/dashboard/admin): platform stats, org list, user list, recent pledges
- /api/admin: returns cross-org data, gated by super_admin role check
- Sidebar shows 'Super Admin' link only for super_admin users
- Password reset: omair@quikcue.com = Omair2026!, demo@pnpl.app = demo1234
- omair@quikcue.com confirmed as super_admin role

pledge-now-pay-later/src/app/dashboard/layout.tsx

@@ -3,7 +3,7 @@
 import Link from "next/link"
 import { usePathname } from "next/navigation"
 import { useSession, signOut } from "next-auth/react"
-import { LayoutDashboard, Calendar, FileBarChart, Upload, Download, Settings, Plus, ExternalLink, LogOut } from "lucide-react"
+import { LayoutDashboard, Calendar, FileBarChart, Upload, Download, Settings, Plus, ExternalLink, LogOut, Shield } from "lucide-react"
 import { cn } from "@/lib/utils"
 
 const navItems = [
@@ -15,6 +15,8 @@ const navItems = [
   { href: "/dashboard/settings", label: "Settings", icon: Settings },
 ]
 
+const adminNav = { href: "/dashboard/admin", label: "Super Admin", icon: Shield }
+
 export default function DashboardLayout({ children }: { children: React.ReactNode }) {
   const pathname = usePathname()
   const { data: session } = useSession()
@@ -76,6 +78,23 @@ export default function DashboardLayout({ children }: { children: React.ReactNod
                 </Link>
               )
             })}
+            {user?.role === "super_admin" && (
+              <>
+                <div className="my-2 border-t" />
+                <Link
+                  href={adminNav.href}
+                  className={cn(
+                    "flex items-center gap-2.5 rounded-lg px-3 py-2 text-sm font-medium transition-colors",
+                    pathname === adminNav.href
+                      ? "bg-trust-blue/5 text-trust-blue"
+                      : "text-muted-foreground hover:bg-gray-100 hover:text-foreground"
+                  )}
+                >
+                  <adminNav.icon className="h-4 w-4" />
+                  {adminNav.label}
+                </Link>
+              </>
+            )}
           </nav>
 
           <div className="mt-auto px-2 pt-4">