Expand invoices with full templates, public viewer API, and account holder.

Add invoice template CRUD, key points/accounts, public GET endpoint, and migration 039 for account_holder_name.

Co-authored-by: Cursor <cursoragent@cursor.com>

.cursor/rules/website-api-docs.mdc

@@ -0,0 +1,29 @@
+---
+description: Keep the public Website API docs pack in sync whenever storefront-facing backend APIs change.
+alwaysApply: true
+---
+
+# Website API docs sync
+
+Whenever you add, change, or remove **storefront / website-facing** APIs (public `tenants/:host/...`, customer auth/addresses, cities, cart, orders, favorites), update the public docs pack in the **same change**.
+
+## Files to keep in sync (both copies)
+
+1. `docs/website-api/` — source of truth for humans / git
+2. `src/website-docs/static/` — served by Nest at `/docs/website` (must match)
+
+Update as needed:
+
+| File | When |
+|------|------|
+| `openapi.json` | Paths, methods, params, bodies, or auth change |
+| `Meshkee-Website-API.postman_collection.json` | Same — add/rename/fix requests |
+| `AI_PROMPT.md` | Flow or hard rules change |
+| `index.html` | Hub copy / links (use **absolute** `/docs/website/...` hrefs, never `./`) |
+
+## Rules
+
+- Docs are **domain-agnostic** (`YOUR_WEBSITE_DOMAIN` / `{domain}`), not tied to one business.
+- Do **not** document CMS/dashboard/super-admin routes in this pack.
+- After editing `docs/website-api/*`, copy the same files into `src/website-docs/static/`.
+- Prefer updating docs in the same PR/commit as the API change; don’t leave storefront contract drift.