BizCore v5.0 — Mundo Ecommerce Core

SAFE / ADDITIVE UPDATE
- Existing inventory, POS, sales, finance, production and FEFO data are not reset.
- Adds Mundo ecommerce tables and pages only.
- Uses existing BizCore items and stock balances as the single source of truth.
- Online order import does NOT deduct stock immediately.
- Stock is deducted only when an authorized BizCore user clicks Confirm & Post Sale.
- Confirmation posts a normal BizCore sales invoice and stock movement.

Install
1. Back up files + database as normal.
2. Extract this update into the BizCore domain root and overwrite when asked.
3. Login as Super Admin.
4. Open /update-5.0.php and click Install Mundo v5.0.
5. Open Mundo Ecommerce > Settings & API.
6. Select the warehouse and generate an API key.
7. Publish products from Mundo Ecommerce > Online Products.

API
GET  /api/mundo/v1/catalog.php
POST /api/mundo/v1/orders.php
Authorization: Bearer YOUR_KEY

This v5.0 package is the BizCore backend/API foundation for the Mundo storefront.
