feat: persistent hidden categories with wizard and toggle

Categories to hide are stored on woo.instance and persist across sessions.
Click 'Hidden (N)' button to open wizard where you can add/remove categories
using a tag picker. Eye/eye-slash toggle to quickly apply or unapply the
filter without losing the saved list.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

fusion-woo-odoo/fusion_woocommerce/controllers/product_search.py

@@ -22,7 +22,8 @@ class WooProductSearchController(http.Controller):
         type='jsonrpc', auth='user', methods=['POST'],
     )
     def search_odoo_products(self, query='', instance_id=None, limit=20, offset=0,
-                             category_id=None, exclude_category_ids=None, **kw):
+                             category_id=None, exclude_category_ids=None,
+                             apply_excluded=False, **kw):
         """
         Search Odoo products by name or internal reference (SKU).
 
@@ -61,6 +62,12 @@ class WooProductSearchController(http.Controller):
             if exclude_category_ids:
                 domain.append(('categ_id', 'not in', [int(x) for x in exclude_category_ids]))
 
+        # Apply instance-level excluded categories
+        if apply_excluded and instance_id:
+            instance = request.env['woo.instance'].browse(int(instance_id))
+            if instance.exists() and instance.excluded_category_ids:
+                domain.append(('categ_id', 'not in', instance.excluded_category_ids.ids))
+
         total = request.env['product.product'].search_count(domain)
         products = request.env['product.product'].search(domain, limit=limit, offset=offset)