feat(wordpress): Add new Elementor widgets and dynamic selectors v1.6.0

New Widgets:
- Brand Grid: Display brands in a grid with product counts
- Category List: Show categories in grid/list/pills layouts
- Specials Grid: Display products on sale with discount badges

Enhanced Product Grid Widget:
- Dynamic category dropdown (fetches from API)
- Dynamic brand dropdown (fetches from API)
- "On Special Only" toggle filter

New Plugin Methods:
- fetch_categories() - Get categories from API
- fetch_brands() - Get brands from API
- fetch_specials() - Get products on sale
- get_category_options() - Cached options for Elementor
- get_brand_options() - Cached options for Elementor

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

wordpress-plugin/widgets/product-grid.php

@@ -47,12 +47,37 @@ class CannaIQ_Menus_Product_Grid_Widget extends \Elementor\Widget_Base {
         );
 
         $this->add_control(
-            'category_id',
+            'category',
             [
-                'label' => __('Category ID', 'cannaiq-menus'),
-                'type' => \Elementor\Controls_Manager::NUMBER,
+                'label' => __('Category', 'cannaiq-menus'),
+                'type' => \Elementor\Controls_Manager::SELECT,
                 'default' => '',
-                'description' => __('Leave empty to show all categories', 'cannaiq-menus'),
+                'options' => CannaIQ_Menus_Plugin::instance()->get_category_options(),
+                'description' => __('Filter by product category', 'cannaiq-menus'),
+            ]
+        );
+
+        $this->add_control(
+            'brand',
+            [
+                'label' => __('Brand', 'cannaiq-menus'),
+                'type' => \Elementor\Controls_Manager::SELECT,
+                'default' => '',
+                'options' => CannaIQ_Menus_Plugin::instance()->get_brand_options(),
+                'description' => __('Filter by brand', 'cannaiq-menus'),
+            ]
+        );
+
+        $this->add_control(
+            'on_special',
+            [
+                'label' => __('On Special Only', 'cannaiq-menus'),
+                'type' => \Elementor\Controls_Manager::SWITCHER,
+                'label_on' => __('Yes', 'cannaiq-menus'),
+                'label_off' => __('No', 'cannaiq-menus'),
+                'return_value' => 'yes',
+                'default' => 'no',
+                'description' => __('Show only products on sale', 'cannaiq-menus'),
             ]
         );
 
@@ -243,8 +268,16 @@ class CannaIQ_Menus_Product_Grid_Widget extends \Elementor\Widget_Base {
             'in_stock' => $settings['in_stock_only'] === 'yes' ? 'true' : 'false',
         ];
 
-        if (!empty($settings['category_id'])) {
-            $args['category_id'] = $settings['category_id'];
+        if (!empty($settings['category'])) {
+            $args['type'] = $settings['category'];
+        }
+
+        if (!empty($settings['brand'])) {
+            $args['brandName'] = $settings['brand'];
+        }
+
+        if ($settings['on_special'] === 'yes') {
+            $args['on_special'] = 'true';
         }
 
         if (!empty($settings['search'])) {