Fs Product Public Category Multi Image

This module extends the eCommerce public product categories so that each category can hold a gallery of images instead of a single picture.

• On the public category form (the same screen used by website_sale), a new "Images" group appears on the right where you can add, view and reorder images in a kanban-style widget.
• Each image line is linked to its category and can be given a tag. Only tags whose "apply on" value is "Public Category" are offered, so image tags stay organised by the area they belong to.
• A new "Public Category" option is added to the image tag configuration, and when you create a tag from the category image screen it is pre-filled with that value.
• Images are stored through the external file system mechanism provided by the base multi-image module, not as regular attachments.

Access is controlled: ordinary internal users can only read category images, while system administrators and sales managers can create, modify and delete them.

The module touches the product.public.category model (adding an image_ids field plus read-only image helpers), the image.tag model (adding the new apply-on option) and introduces the fs.product.public.category.image model that stores each image line.