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

includes/class-wc-tpp-admin.php

@@ -0,0 +1,48 @@
+<?php
+/**
+ * Admin settings and configuration
+ */
+
+if (!defined('ABSPATH')) {
+    exit;
+}
+
+class WC_TPP_Admin {
+
+    public function __construct() {
+        add_action('admin_menu', array($this, 'add_admin_menu'));
+        add_action('admin_init', array($this, 'register_settings'));
+        add_action('admin_enqueue_scripts', array($this, 'enqueue_admin_scripts'));
+    }
+
+    public function add_admin_menu() {
+        add_submenu_page(
+            'woocommerce',
+            __('Tier & Package Prices', 'wc-tier-package-prices'),
+            __('Tier & Package Prices', 'wc-tier-package-prices'),
+            'manage_woocommerce',
+            'wc-tier-package-prices',
+            array($this, 'settings_page')
+        );
+    }
+
+    public function register_settings() {
+        register_setting('wc_tpp_settings', 'wc_tpp_enable_tier_pricing');
+        register_setting('wc_tpp_settings', 'wc_tpp_enable_package_pricing');
+        register_setting('wc_tpp_settings', 'wc_tpp_display_table');
+        register_setting('wc_tpp_settings', 'wc_tpp_display_position');
+    }
+
+    public function enqueue_admin_scripts($hook) {
+        if ('woocommerce_page_wc-tier-package-prices' === $hook || 'post.php' === $hook || 'post-new.php' === $hook) {
+            wp_enqueue_style('wc-tpp-admin', WC_TPP_PLUGIN_URL . 'assets/css/admin.css', array(), WC_TPP_VERSION);
+            wp_enqueue_script('wc-tpp-admin', WC_TPP_PLUGIN_URL . 'assets/js/admin.js', array('jquery'), WC_TPP_VERSION, true);
+        }
+    }
+
+    public function settings_page() {
+        WC_TPP_Template_Loader::get_instance()->display('admin/settings-page.twig');
+    }
+}
+
+new WC_TPP_Admin();