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/maintenance-summary/route.ts

@@ -0,0 +1,61 @@
+import { NextResponse } from "next/server"
+import { and, eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { properties, maintenance_requests } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+import { openai } from "@/lib/ai/client"
+import { MAINTENANCE_SUMMARY_PROMPT, dataBlock } from "@/lib/ai/prompts"
+import { enforceAiQuota } from "@/lib/ai/usage"
+
+export async function POST(request: Request) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const quota = await enforceAiQuota(user.id, "ai_maintenance_summary")
+  if (!quota.ok) return NextResponse.json({ error: quota.error }, { status: quota.status })
+
+  const { property_id } = await request.json() as { property_id: string }
+
+  const requests = await db
+    .select({
+      title: maintenance_requests.title,
+      description: maintenance_requests.description,
+      category: maintenance_requests.category,
+      priority: maintenance_requests.priority,
+      status: maintenance_requests.status,
+      estimated_cost: maintenance_requests.estimated_cost,
+      actual_cost: maintenance_requests.actual_cost,
+      created_at: maintenance_requests.created_at,
+      resolved_at: maintenance_requests.resolved_at,
+    })
+    .from(maintenance_requests)
+    .where(and(eq(maintenance_requests.user_id, user.id), eq(maintenance_requests.property_id, property_id)))
+
+  const property = await db.query.properties.findFirst({
+    where: and(eq(properties.id, property_id), eq(properties.user_id, user.id)),
+    columns: { name: true },
+  })
+
+  const completion = await openai.chat.completions.create({
+    model: "gpt-4o-mini",
+    max_tokens: 1024,
+    messages: [
+      { role: "system", content: MAINTENANCE_SUMMARY_PROMPT },
+      {
+        role: "user",
+        content: `${dataBlock("PROPERTY NAME", property?.name ?? "Unknown")}\n\n${dataBlock("MAINTENANCE REQUESTS", JSON.stringify(requests, null, 2))}`,
+      },
+    ],
+  })
+
+  const text = completion.choices[0].message.content ?? ""
+
+  let summary
+  try {
+    summary = JSON.parse(text.replace(/```json\n?/g, "").replace(/```\n?/g, "").trim())
+  } catch {
+    return NextResponse.json({ error: "Failed to parse AI response" }, { status: 500 })
+  }
+
+  return NextResponse.json(summary)
+}