BizCore v6.2.2 - Mundo Wide Storefront + Boxed Navigation UI

UI-only safe patch.
- Wider centered storefront container up to 1480px on large desktops.
- Responsive product grid: 5 / 4 / 3 / 2 / 1 columns.
- Premium boxed Shop, Track Order, Become a Seller, Seller Login and Cart controls.
- Better hover/focus states and responsive wrapping.
- No database migration and no business data changes.

Install: extract into ceylongemx.online root and overwrite existing files, then open /update-6.2.2.php.
