Release version 1.1.0 - Package quantity restriction feature

Added comprehensive package quantity restriction functionality that allows
limiting product purchases to predefined package sizes only.

Features:
- Global setting to enable package quantity restrictions
- Per-product override for quantity restrictions
- Automatic hiding of quantity input field when restricted
- Frontend validation with package selection UI
- Server-side cart validation
- User-friendly error messages
- Complete translations for all supported languages

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

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

includes/class-wc-tpp-frontend.php

@@ -14,6 +14,7 @@ class WC_TPP_Frontend {
         add_action('woocommerce_before_add_to_cart_button', array($this, 'display_pricing_table_before'), 20);
         add_action('woocommerce_after_add_to_cart_button', array($this, 'display_pricing_table_after'), 10);
         add_action('woocommerce_single_product_summary', array($this, 'display_pricing_table_after_price'), 15);
+        add_action('woocommerce_before_add_to_cart_quantity', array($this, 'maybe_hide_quantity_input'));
     }
 
     public function enqueue_scripts() {
@@ -50,6 +51,24 @@ class WC_TPP_Frontend {
         }
     }
 
+    public function maybe_hide_quantity_input() {
+        global $product;
+
+        if (!$product || !is_a($product, 'WC_Product')) {
+            return;
+        }
+
+        $product_id = $product->get_id();
+        $global_restrict = get_option('wc_tpp_restrict_package_quantities', 'no') === 'yes';
+        $product_restrict = get_post_meta($product_id, '_wc_tpp_restrict_to_packages', true) === 'yes';
+        $packages = get_post_meta($product_id, '_wc_tpp_packages', true);
+
+        // Hide quantity input if restriction is enabled and packages exist
+        if (($global_restrict || $product_restrict) && !empty($packages)) {
+            echo '<style>.quantity { display: none !important; }</style>';
+        }
+    }
+
     public function display_pricing_table() {
         global $product;
 
@@ -60,6 +79,8 @@ class WC_TPP_Frontend {
         $product_id = $product->get_id();
         $tiers = get_post_meta($product_id, '_wc_tpp_tiers', true);
         $packages = get_post_meta($product_id, '_wc_tpp_packages', true);
+        $global_restrict = get_option('wc_tpp_restrict_package_quantities', 'no') === 'yes';
+        $product_restrict = get_post_meta($product_id, '_wc_tpp_restrict_to_packages', true) === 'yes';
 
         if (empty($tiers) && empty($packages)) {
             return;
@@ -68,7 +89,8 @@ class WC_TPP_Frontend {
         WC_TPP_Template_Loader::get_instance()->display('frontend/pricing-table.twig', array(
             'product' => $product,
             'tiers' => $tiers,
-            'packages' => $packages
+            'packages' => $packages,
+            'restrict_to_packages' => $global_restrict || $product_restrict
         ));
     }