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>

app/(dashboard)/tenants/[tenantId]/edit/page.tsx

@@ -0,0 +1,43 @@
+import { notFound, redirect } from "next/navigation"
+import { and, asc, eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { tenants as tenantsTable, properties } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+import { TenantForm } from "@/components/forms/tenant-form"
+import { BackButton } from "@/components/ui/back-button"
+
+export const metadata = { title: "Edit Tenant" }
+
+export default async function EditTenantPage({ params }: { params: Promise<{ tenantId: string }> }) {
+  const user = await getSessionUser()
+  if (!user) redirect("/login")
+
+  const { tenantId } = await params
+
+  const [tenant, properties_] = await Promise.all([
+    db.query.tenants.findFirst({
+      where: and(eq(tenantsTable.id, tenantId), eq(tenantsTable.user_id, user.id)),
+    }),
+    db.query.properties.findMany({
+      where: eq(properties.user_id, user.id),
+      columns: { id: true, name: true },
+      with: {
+        units: { columns: { id: true, unit_number: true, status: true } },
+      },
+      orderBy: asc(properties.name),
+    }),
+  ])
+
+  if (!tenant) notFound()
+
+  return (
+    <div className="mx-auto max-w-2xl space-y-6">
+      <BackButton href={`/tenants/${tenantId}`} />
+      <div>
+        <h2 className="text-lg font-semibold text-white">Edit Tenant</h2>
+        <p className="text-sm text-white/40">{tenant.first_name} {tenant.last_name}</p>
+      </div>
+      <TenantForm properties={properties_ ?? []} tenant={tenant} />
+    </div>
+  )
+}