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/maintenance/[id]/route.ts

@@ -0,0 +1,79 @@
+import { NextResponse } from "next/server"
+import { and, eq } from "drizzle-orm"
+import { db } from "@/lib/db"
+import { maintenance_requests } from "@/lib/db/schema"
+import { getSessionUser } from "@/lib/session"
+import { maintenanceSchema } from "@/lib/validations"
+import { ownsProperty, ownsUnit, ownsTenant } from "@/lib/db/ownership"
+import { z } from "zod"
+
+const maintenancePatchSchema = maintenanceSchema.partial().extend({
+  status: z.enum(["open", "in_progress", "resolved", "closed"]).optional(),
+  resolution_notes: z.string().optional(),
+  actual_cost: z.number().positive().optional(),
+  resolved_at: z.string().optional(),
+})
+
+export async function GET(_: Request, { params }: { params: Promise<{ id: string }> }) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const { id } = await params
+  const data = await db.query.maintenance_requests.findFirst({
+    where: and(eq(maintenance_requests.id, id), eq(maintenance_requests.user_id, user.id)),
+    with: {
+      property: { columns: { name: true, address_line1: true, city: true } },
+      unit: { columns: { unit_number: true } },
+      tenant: { columns: { first_name: true, last_name: true, email: true, phone: true } },
+    },
+  })
+
+  if (!data) return NextResponse.json({ error: "Not found" }, { status: 404 })
+  return NextResponse.json(data)
+}
+
+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 body = await request.json()
+  const parsed = maintenancePatchSchema.safeParse(body)
+  if (!parsed.success) return NextResponse.json({ error: parsed.error.flatten() }, { status: 400 })
+
+  if (
+    !(await ownsProperty(user.id, parsed.data.property_id)) ||
+    !(await ownsUnit(user.id, parsed.data.unit_id)) ||
+    !(await ownsTenant(user.id, parsed.data.tenant_id))
+  ) {
+    return NextResponse.json({ error: "Invalid reference" }, { status: 403 })
+  }
+
+  const updateData: Record<string, unknown> = { ...parsed.data }
+
+  // Auto-set resolved_at when status → resolved
+  if (parsed.data.status === "resolved" && !parsed.data.resolved_at) {
+    updateData.resolved_at = new Date().toISOString()
+  }
+
+  const [data] = await db
+    .update(maintenance_requests)
+    .set(updateData)
+    .where(and(eq(maintenance_requests.id, id), eq(maintenance_requests.user_id, user.id)))
+    .returning()
+
+  if (!data) return NextResponse.json({ error: "Not found" }, { status: 404 })
+  return NextResponse.json(data)
+}
+
+export async function DELETE(_: Request, { params }: { params: Promise<{ id: string }> }) {
+  const user = await getSessionUser()
+  if (!user) return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+
+  const { id } = await params
+  await db
+    .delete(maintenance_requests)
+    .where(and(eq(maintenance_requests.id, id), eq(maintenance_requests.user_id, user.id)))
+
+  return NextResponse.json({ success: true })
+}