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/api/ai/recommendations/[id]/route.ts

@@ -0,0 +1,42 @@
+import { NextResponse } from "next/server"
+import { and, eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { ai_recommendations } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+import { logActivity } from "@/lib/activity"
+
+export async function PATCH(request: Request, { params }: { params: Promise<{ id: string }> }) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const { id } = await params
+  const { status } = await request.json() as { status: "approved" | "dismissed" }
+
+  if (!["approved", "dismissed"].includes(status)) {
+    return NextResponse.json({ error: "Invalid status" }, { status: 400 })
+  }
+
+  const updateData: Record<string, unknown> = { status }
+  if (status === "approved") updateData.applied_at = new Date().toISOString()
+  if (status === "dismissed") updateData.dismissed_at = new Date().toISOString()
+
+  const [data] = await db
+    .update(ai_recommendations)
+    .set(updateData)
+    .where(and(eq(ai_recommendations.id, id), eq(ai_recommendations.user_id, user.id)))
+    .returning()
+
+  if (!data) return NextResponse.json({ error: "Not found" }, { status: 404 })
+
+  await logActivity({
+    userId: user.id,
+    type: "ai_action",
+    title: status === "approved"
+      ? `AI recommendation approved: ${data.title}`
+      : `AI recommendation dismissed: ${data.title}`,
+    entityType: "ai_recommendation",
+    entityId: id,
+  })
+
+  return NextResponse.json(data)
+}