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/ui/highlight-row.tsx

@@ -0,0 +1,42 @@
+"use client"
+
+import { useEffect, useRef } from "react"
+import { useSearchParams } from "next/navigation"
+import { cn } from "@/lib/utils"
+
+/**
+ * Wrap a table row with this to flash it when ?highlight=<id> matches.
+ * Usage: <HighlightRow id={item.id} className="...your tr classes...">
+ */
+export function HighlightRow({
+  id,
+  children,
+  className,
+}: {
+  id: string
+  children: React.ReactNode
+  className?: string
+}) {
+  const params = useSearchParams()
+  const highlight = params.get("highlight")
+  const isHighlighted = highlight === id
+  const ref = useRef<HTMLTableRowElement>(null)
+
+  useEffect(() => {
+    if (isHighlighted && ref.current) {
+      ref.current.scrollIntoView({ behavior: "smooth", block: "center" })
+    }
+  }, [isHighlighted])
+
+  return (
+    <tr
+      ref={ref}
+      className={cn(
+        className,
+        isHighlighted && "animate-highlight"
+      )}
+    >
+      {children}
+    </tr>
+  )
+}