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/impact/route.ts

@@ -0,0 +1,56 @@
+import { NextResponse } from "next/server"
+import { eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { ai_recommendations } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+
+export async function GET() {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const all = await db
+    .select()
+    .from(ai_recommendations)
+    .where(eq(ai_recommendations.user_id, user.id))
+
+  const approved = all.filter((r) => r.status === "approved")
+  const dismissed = all.filter((r) => r.status === "dismissed")
+  const pending = all.filter((r) => r.status === "pending")
+
+  let totalRevenue = 0
+  let totalSavings = 0
+  let totalRiskPrevented = 0
+
+  for (const r of approved) {
+    const val = Number(r.action_data?.estimated_value ?? 0)
+    const vtype = r.action_data?.value_type ?? "revenue"
+    if (vtype === "revenue") totalRevenue += val
+    else if (vtype === "savings") totalSavings += val
+    else if (vtype === "risk_prevention") totalRiskPrevented += val
+  }
+
+  const byType = approved.reduce((acc: Record<string, number>, r) => {
+    acc[r.type] = (acc[r.type] ?? 0) + 1
+    return acc
+  }, {})
+
+  return NextResponse.json({
+    totals: {
+      generated: all.length,
+      approved: approved.length,
+      dismissed: dismissed.length,
+      pending: pending.length,
+      approval_rate: all.length > 0 ? Math.round((approved.length / all.length) * 100) : 0,
+    },
+    impact: {
+      revenue: totalRevenue,
+      savings: totalSavings,
+      risk_prevented: totalRiskPrevented,
+      total: totalRevenue + totalSavings + totalRiskPrevented,
+    },
+    by_type: byType,
+    recent_approved: approved
+      .sort((a, b) => new Date(b.applied_at ?? 0).getTime() - new Date(a.applied_at ?? 0).getTime())
+      .slice(0, 5),
+  })
+}