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>

scripts/migrate-admin.ts

@@ -0,0 +1,58 @@
+/**
+ * Idempotent migration for the admin dashboard: adds the Better Auth admin
+ * plugin columns (user.role/banned/ban_reason/ban_expires, session.impersonated_by)
+ * and the admin_audit_log table. Safe to run multiple times.
+ *
+ * Run: npx tsx scripts/migrate-admin.ts
+ */
+import { config } from "dotenv"
+config({ path: ".env.local" })
+process.env.DATABASE_SSL = process.env.DATABASE_SSL ?? "disable"
+
+const SQL = `
+ALTER TABLE "user" ADD COLUMN IF NOT EXISTS "role" text DEFAULT 'user';
+ALTER TABLE "user" ADD COLUMN IF NOT EXISTS "banned" boolean DEFAULT false;
+ALTER TABLE "user" ADD COLUMN IF NOT EXISTS "ban_reason" text;
+ALTER TABLE "user" ADD COLUMN IF NOT EXISTS "ban_expires" timestamp;
+ALTER TABLE "session" ADD COLUMN IF NOT EXISTS "impersonated_by" text;
+
+CREATE TABLE IF NOT EXISTS "admin_audit_log" (
+  "id" uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  "admin_id" text,
+  "action" text NOT NULL,
+  "target_user_id" text,
+  "metadata" jsonb NOT NULL DEFAULT '{}'::jsonb,
+  "ip_address" text,
+  "created_at" timestamptz NOT NULL DEFAULT now()
+);
+
+DO $$ BEGIN
+  ALTER TABLE "admin_audit_log"
+    ADD CONSTRAINT "admin_audit_log_admin_id_user_id_fk"
+    FOREIGN KEY ("admin_id") REFERENCES "user"("id") ON DELETE SET NULL;
+EXCEPTION WHEN duplicate_object THEN NULL; END $$;
+
+CREATE INDEX IF NOT EXISTS "admin_audit_log_created_at_idx" ON "admin_audit_log" ("created_at" DESC);
+CREATE INDEX IF NOT EXISTS "admin_audit_log_target_idx" ON "admin_audit_log" ("target_user_id");
+`
+
+async function main() {
+  const { pool } = await import("../lib/db")
+  await pool.query(SQL)
+  const cols = await pool.query(
+    `select table_name, column_name from information_schema.columns
+     where (table_name='user' and column_name in ('role','banned','ban_reason','ban_expires'))
+        or (table_name='session' and column_name='impersonated_by')
+     order by table_name, column_name`
+  )
+  console.log("Applied admin migration. New columns present:")
+  for (const r of cols.rows) console.log(`  ${r.table_name}.${r.column_name}`)
+  const t = await pool.query(`select to_regclass('public.admin_audit_log') as t`)
+  console.log(`  admin_audit_log table: ${t.rows[0].t ? "OK" : "MISSING"}`)
+  await pool.end()
+}
+
+main().catch((e) => {
+  console.error("Migration failed:", e)
+  process.exit(1)
+})