M/S BABU ENTERPRISE - RESPONSIVE PRODUCT & SPARE PARTS UPDATE

New public pages and improvements:
1. products.php is now the dedicated Machines catalogue.
2. spare-parts.php is a dedicated searchable Spare Parts catalogue.
3. Product details page has been restructured for mobile, tablet and desktop.
4. Responsive gallery, stacked mobile specifications, flexible enquiry panel and mobile quick-action bar.
5. Machine pages display linked spare parts.
6. Spare-part pages display compatible machines when linked in Product Management.
7. Navigation and footer now include Machines and Spare Parts separately.
8. Home page includes a Spare Parts section.
9. Admin Product Management remains the single place to add/edit machines and spare parts.

HOW TO ADD A SPARE PART FROM ADMIN
- Admin Panel > Products > Add Product
- Main Category: Spare Parts & Accessories
- Choose a suitable subcategory (Embroidery Parts, Electronic Parts or Mechanical Parts)
- Add SKU, barcode, images, description and specification
- Save the product

HOW TO LINK PARTS TO MACHINES
- Edit a machine in Admin Panel
- Select the required items under Compatible Spare Parts
- Save the machine
- The machine page will show those parts and the part page will show compatible machines.

IMPORTANT UPGRADE NOTE
Before replacing an existing installation, back up:
- storage/products.json
- storage/site.json
- storage/admin.json
- storage/enquiries.jsonl
- storage/categories.json
- storage/brands.json
- assets/uploads/
