BizCore v3.3.1 Smart Search Hotfix

FIX
- Corrected item_brands column from brand_name to name.
- Corrected item_categories column from category_name to name.
- Fixes "Product search failed" and the SQL error:
  Unknown column 'b.brand_name' in SELECT.

INSTALL
1. Upload this ZIP to /public_html/ceylongemx.online/
2. Extract and overwrite pos-product-search.php.
3. No database update URL is required.
4. Press Ctrl + F5.
5. Test:
   https://ceylongemx.online/pos-product-search.php?q=deval&warehouse_id=1

EXPECTED RESULT
- The URL should return JSON beginning with {"ok":true
- Fast POS should display live suggestions while typing.
