[ADD] website_sale_aplicoop: Category blacklist with recursive exclusion

- Add comprehensive test suite for excluded_category_ids
- 9 tests covering: single category, recursive subcategories,
  parent exclusion, direct product override, unrelated categories,
  empty blacklist, multiple exclusions, combined blacklists,
  available_products_count validation
- Update UI to show excluded_category_ids in 'Productos Excluidos'
- Bump version to 18.0.1.6.0
- Update CHANGELOG with category blacklist documentation

Technical notes:
- Category blacklist was already implemented in model/logic
- This commit adds missing tests and documentation
- Recursive exclusion via get_all_excluded_descendants()
- Blacklist has absolute priority over all inclusion sources

website_sale_aplicoop/models/group_order.py

@@ -205,6 +205,14 @@ class GroupOrder(models.Model):
         tracking=True,
         help="Suppliers excluded from this order. Products with these suppliers as main seller will not be available (blacklist has absolute priority)",
     )
+    excluded_category_ids = fields.Many2many(
+        "product.category",
+        "group_order_excluded_category_rel",
+        "order_id",
+        "category_id",
+        tracking=True,
+        help="Categories excluded from this order. Products in these categories and all their subcategories will not be available (blacklist has absolute priority)",
+    )
 
     # === Estado ===
     state = fields.Selection(
@@ -256,6 +264,7 @@ class GroupOrder(models.Model):
         "supplier_ids",
         "excluded_product_ids",
         "excluded_supplier_ids",
+        "excluded_category_ids",
     )
     def _compute_available_products_count(self):
         """Count all available products from all sources."""
@@ -439,6 +448,35 @@ class GroupOrder(models.Model):
                     len(products),
                 )
 
+        # 6) Apply category blacklist filter (absolute priority)
+        # Exclude products in excluded categories and all their subcategories (recursive)
+        if order.excluded_category_ids:
+            # Collect all excluded category IDs including descendants
+            excluded_cat_ids = []
+
+            def get_all_excluded_descendants(categories):
+                """Recursively collect all excluded category IDs including children."""
+                for cat in categories:
+                    excluded_cat_ids.append(cat.id)
+                    if cat.child_id:
+                        get_all_excluded_descendants(cat.child_id)
+
+            get_all_excluded_descendants(order.excluded_category_ids)
+
+            # Filter products whose category is in the excluded list
+            excluded_by_category = products.filtered(
+                lambda p: p.categ_id.id in excluded_cat_ids
+            )
+            if excluded_by_category:
+                products = products - excluded_by_category
+                _logger.info(
+                    "Group order %d: Excluded %d products from category blacklist (categories: %s, including subcategories) (total: %d)",
+                    order.id,
+                    len(excluded_by_category),
+                    ", ".join(order.excluded_category_ids.mapped("name")),
+                    len(products),
+                )
+
         return products
 
     def _get_products_paginated(self, order_id, page=1, per_page=20):