refactor(db): replace sqlc with handwritten pgx repos

- Finish Paddle-to-Stripe billing migration; drop paddle/stripe libs
- Renumber migrations; add 00012 memberships+manage_token,
  00013 location_type_capacity
- Add tests: admin, auth, bookings customer service
- Remove graphify-out artifacts and stale env files

Authored By: TDvorak <[email protected]>

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

FRONTEND_ISSUES.md

@@ -27,3 +27,15 @@
 
 - Many dashboard inline i18n ternaries remain (~280). Systematic extraction to `i18n.t()` keys is an ongoing task.
 - Registration cannot be fully customer-tested locally until Neon Auth environment variables are configured.
+
+## Fixed This Session (platform audit pass)
+
+- Billing checkout sends `planCode`/`currency`/`billingInterval` and reads `checkoutUrl` (was `{interval}`/`url` — broken end-to-end). Plan selector added to the billing page.
+- Billing page now reads normalized backend fields (`status`, `planCode`, `trialDays`, `maxBookingsMonth`).
+- Zones page rewired to real catalog APIs: locations CRUD, blocked days CRUD, working-hours persistence — all three tabs now functional.
+- Customers page loads `GET /v1/catalog/customers` instead of hardcoded mock rows (demo mode keeps sample data).
+- Settings email-template editor now loads saved templates via `GET /v1/tenants/email-templates` and saves with `isEnabled`.
+- Dead code removed: `dashboard-route.tsx`, `dashboard-route.tsx.backup`, `lib/paddle.ts`, `lib/stripe.ts`, `@paddle/paddle-js`, `@stripe/stripe-js`.
+- Demo bootstrap slug aligned with backend demo tenant (`studio-atelier`).
+- Paddle mentions replaced by Stripe in legal + i18n copy.
+- `@neondatabase/neon-js` bumped to 0.7.0-beta — `npm audit` now reports 0 vulnerabilities.