Initial import: property management SaaS + security hardening + admin dashboard

Property Management Network — Next.js 16 (App Router), Better Auth,
Drizzle ORM over PostgreSQL, Stripe, OpenAI, Resend.

Includes:
- Security hardening: access-control/IDOR fixes, TLS-by-default DB layer,
  constant-time cron auth, strict security headers, atomic AI quota gating,
  HTML/email output encoding, demo-backdoor disabled in production.
- Superadmin dashboard at /admin (overview/MRR, server-paginated users with
  ban/impersonate/plan/delete, billing, platform activity + admin audit log,
  AI usage, system health) via the Better Auth admin plugin.
- Seed/migration utility scripts under scripts/.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

components/shared/empty-state.tsx

@@ -0,0 +1,34 @@
+import Link from "next/link"
+import type { LucideIcon } from "lucide-react"
+import { cn } from "@/lib/utils"
+
+interface EmptyStateProps {
+  icon: LucideIcon
+  title: string
+  description: string
+  action?: { label: string; href: string }
+  className?: string
+}
+
+export function EmptyState({ icon: Icon, title, description, action, className }: EmptyStateProps) {
+  return (
+    <div className={cn("flex flex-col items-center justify-center py-20 text-center", className)}>
+      <div className="relative">
+        <div className="absolute inset-0 rounded-2xl bg-indigo-500/10 blur-xl" />
+        <div className="relative flex h-16 w-16 items-center justify-center rounded-2xl border border-white/[0.08] bg-gradient-to-br from-white/[0.07] to-white/[0.02]">
+          <Icon className="h-7 w-7 text-white/40" />
+        </div>
+      </div>
+      <h3 className="mt-5 text-base font-semibold text-white">{title}</h3>
+      <p className="mt-2 max-w-xs text-sm leading-relaxed text-white/40">{description}</p>
+      {action && (
+        <Link
+          href={action.href}
+          className="mt-6 rounded-xl bg-indigo-600 px-5 py-2.5 text-sm font-semibold text-white transition hover:bg-indigo-500 hover:shadow-lg hover:shadow-indigo-500/25"
+        >
+          {action.label}
+        </Link>
+      )}
+    </div>
+  )
+}