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>

supabase/google-oauth-setup.md

@@ -0,0 +1,32 @@
+# Google OAuth Setup
+
+## Step 1 — Google Cloud Console
+
+1. Go to https://console.cloud.google.com
+2. Create a new project (or select existing)
+3. Go to "APIs & Services" → "Credentials"
+4. Click "Create Credentials" → "OAuth 2.0 Client IDs"
+5. Application type: "Web application"
+6. Name: "Property Management Network"
+7. Authorized redirect URIs — add:
+   ```
+   https://lcumidlbsokrbkwkmklk.supabase.co/auth/v1/callback
+   ```
+8. Click "Create"
+9. Copy the **Client ID** and **Client Secret**
+
+## Step 2 — Supabase Dashboard
+
+1. Go to https://supabase.com/dashboard/project/lcumidlbsokrbkwkmklk/auth/providers
+2. Find "Google" and enable it
+3. Paste the **Client ID** and **Client Secret** from Step 1
+4. Save
+
+## Step 3 — Site URL
+
+1. Go to https://supabase.com/dashboard/project/lcumidlbsokrbkwkmklk/auth/url-configuration
+2. Set Site URL to: `http://localhost:3000`
+3. Add Redirect URL: `http://localhost:3000/api/auth/callback`
+4. Save
+
+Done — Google OAuth will work.