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>

assets/js/frontend.js

@@ -8,8 +8,9 @@
     $(document).ready(function() {
         const $quantityInput = $('input.qty');
         const $priceDisplay = $('.woocommerce-Price-amount.amount').first();
+        const isRestrictedMode = $('.wc-tpp-package-pricing-table').hasClass('wc-tpp-restricted-mode');
 
-        if ($quantityInput.length === 0) {
+        if ($quantityInput.length === 0 && !isRestrictedMode) {
             return;
         }
 
@@ -164,7 +165,30 @@
             const $package = $(this).closest('.wc-tpp-package');
             const qty = parseInt($package.data('qty'));
 
-            $quantityInput.val(qty).trigger('change');
+            if (isRestrictedMode) {
+                // In restricted mode, we need to set a hidden input or use data attribute
+                // since the quantity field is hidden
+                if ($quantityInput.length === 0) {
+                    // Create a hidden quantity input if it doesn't exist
+                    if ($('.qty-hidden-input').length === 0) {
+                        $('.single_add_to_cart_button').before('<input type="hidden" name="quantity" class="qty qty-hidden-input" value="1" />');
+                    }
+                    $('.qty-hidden-input').val(qty);
+                } else {
+                    $quantityInput.val(qty);
+                }
+
+                // Highlight selected package
+                $('.wc-tpp-package').removeClass('wc-tpp-selected');
+                $package.addClass('wc-tpp-selected');
+
+                // Update price display
+                const price = parseFloat($package.data('price'));
+                const unitPrice = price / qty;
+                updatePrice(unitPrice, 'Package price: ' + formatPrice(price) + ' total');
+            } else {
+                $quantityInput.val(qty).trigger('change');
+            }
 
             // Scroll to add to cart button
             $('html, body').animate({
@@ -172,8 +196,22 @@
             }, 500);
         });
 
+        // In restricted mode, prevent form submission if no package is selected
+        if (isRestrictedMode) {
+            $('form.cart').on('submit', function(e) {
+                const hasSelection = $('.wc-tpp-package.wc-tpp-selected').length > 0;
+                if (!hasSelection) {
+                    e.preventDefault();
+                    alert('Please select a package size before adding to cart.');
+                    return false;
+                }
+            });
+        }
+
         // Initial update
-        updatePriceDisplay();
+        if (!isRestrictedMode) {
+            updatePriceDisplay();
+        }
     });
 
 })(jQuery);