BizCore v6.1 - Mundo Commerce Completion

SAFE ADDITIVE UPDATE.
Does not delete or reset existing BizCore, inventory, finance, purchasing, seller or order data.

Includes:
- seller-submitted product approval -> automatic live ecommerce product bridge
- seller default + product-specific commission remains supported
- seller price/stock used on public catalog and orders
- vendor stock decremented when BizCore confirms/posts the Mundo sale
- premium public catalog search/filter, product details and seller shop pages
- checkout payment/courier registry options
- courier delivery fee/free-delivery threshold support
- public order tracking by order reference + checkout phone
- password confirmation on marketplace product approval, gateway/courier settings and order control
- live payment provider adapters are NOT fabricated: provider-specific API adapter still requires the selected gateway's official API credentials/specification.

INSTALL:
1. Upload ZIP to ceylongemx.online root.
2. Extract / overwrite.
3. Open /update-6.1.php while logged in as Super Admin.
4. Test Seller Product approval -> Storefront -> Checkout -> BizCore Online Orders -> Confirm -> Track Order.
