Release version 1.0.1

- Add Twig template engine integration
- Migrate all templates to Twig format
- Add German (Switzerland, Informal) translation
- Improve template organization and security
- Add Composer dependency management
- Create comprehensive changelog

assets/js/admin.js

@@ -0,0 +1,62 @@
+/**
+ * Admin JavaScript for WooCommerce Tier and Package Prices
+ */
+
+(function($) {
+    'use strict';
+
+    $(document).ready(function() {
+        let tierIndex = $('.wc-tpp-tier-row').length;
+        let packageIndex = $('.wc-tpp-package-row').length;
+
+        // Add tier
+        $('.wc-tpp-add-tier').on('click', function(e) {
+            e.preventDefault();
+            const template = $('#wc-tpp-tier-row-template').html();
+            const newRow = template.replace(/\{\{INDEX\}\}/g, tierIndex);
+            $('.wc-tpp-tiers-container').append(newRow);
+            tierIndex++;
+        });
+
+        // Remove tier
+        $(document).on('click', '.wc-tpp-remove-tier', function(e) {
+            e.preventDefault();
+            if (confirm('Are you sure you want to remove this tier?')) {
+                $(this).closest('.wc-tpp-tier-row').remove();
+            }
+        });
+
+        // Add package
+        $('.wc-tpp-add-package').on('click', function(e) {
+            e.preventDefault();
+            const template = $('#wc-tpp-package-row-template').html();
+            const newRow = template.replace(/\{\{INDEX\}\}/g, packageIndex);
+            $('.wc-tpp-packages-container').append(newRow);
+            packageIndex++;
+        });
+
+        // Remove package
+        $(document).on('click', '.wc-tpp-remove-package', function(e) {
+            e.preventDefault();
+            if (confirm('Are you sure you want to remove this package?')) {
+                $(this).closest('.wc-tpp-package-row').remove();
+            }
+        });
+
+        // Validate inputs
+        $(document).on('input', 'input[name*="[min_qty]"], input[name*="[qty]"]', function() {
+            const value = parseInt($(this).val());
+            if (value < 1) {
+                $(this).val(1);
+            }
+        });
+
+        $(document).on('input', 'input[name*="[price]"]', function() {
+            const value = parseFloat($(this).val());
+            if (value < 0) {
+                $(this).val(0);
+            }
+        });
+    });
+
+})(jQuery);