Release version 1.3.0 - License management and settings sub-tabs

Breaking Changes:
- PHP 8.3+ now required (previously 7.4+)

Added:
- License management integration using magdev/wc-licensed-product-client
- Settings page split into General and License sub-tabs
- License validation and activation via AJAX
- PHP version check with admin notice

Changed:
- Refactored settings class to use modern WooCommerce patterns
- Updated all translations with new license-related strings

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

languages/wc-tier-package-prices-de_DE.po

@@ -277,3 +277,103 @@ msgstr "Preis"
 #: includes/class-wc-tpp-product-meta.php:165
 msgid "Label (optional)"
 msgstr "Beschriftung (optional)"
+
+#: wc-tier-and-package-prices.php
+msgid "WooCommerce Tier and Package Prices requires PHP 8.3 or higher. Your server is running PHP %s."
+msgstr "WooCommerce Staffel- und Paketpreise erfordert PHP 8.3 oder höher. Ihr Server verwendet PHP %s."
+
+#: includes/class-wc-tpp-settings.php
+msgid "License"
+msgstr "Lizenz"
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Management"
+msgstr "Lizenzverwaltung"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Enter your license key to receive updates and support."
+msgstr "Geben Sie Ihren Lizenzschlüssel ein, um Updates und Support zu erhalten."
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Server URL"
+msgstr "Lizenzserver-URL"
+
+#: includes/class-wc-tpp-settings.php
+msgid "The URL of the license server."
+msgstr "Die URL des Lizenzservers."
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Key"
+msgstr "Lizenzschlüssel"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Your license key for this plugin."
+msgstr "Ihr Lizenzschlüssel für dieses Plugin."
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Status"
+msgstr "Lizenzstatus"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Validate License"
+msgstr "Lizenz überprüfen"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Activate License"
+msgstr "Lizenz aktivieren"
+
+#: includes/class-wc-tpp-settings.php
+msgid "No license activated"
+msgstr "Keine Lizenz aktiviert"
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Active"
+msgstr "Lizenz aktiv"
+
+#: includes/class-wc-tpp-settings.php
+msgid "License Invalid"
+msgstr "Lizenz ungültig"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Lifetime License"
+msgstr "Lebenslange Lizenz"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Expires: %s"
+msgstr "Läuft ab: %s"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Last checked: %s"
+msgstr "Zuletzt geprüft: %s"
+
+#: includes/class-wc-tpp-settings.php
+msgid "License is valid!"
+msgstr "Lizenz ist gültig!"
+
+#: includes/class-wc-tpp-settings.php
+msgid "License activated successfully!"
+msgstr "Lizenz erfolgreich aktiviert!"
+
+#: includes/class-wc-tpp-settings.php
+msgid "Permission denied."
+msgstr "Zugriff verweigert."
+
+#: includes/class-wc-tpp-settings.php
+msgid "License key and server URL are required."
+msgstr "Lizenzschlüssel und Server-URL sind erforderlich."
+
+#: includes/class-wc-tpp-settings.php
+msgid "Please enter both license server URL and license key."
+msgstr "Bitte geben Sie sowohl die Lizenzserver-URL als auch den Lizenzschlüssel ein."
+
+#: includes/class-wc-tpp-settings.php
+msgid "Validation failed."
+msgstr "Überprüfung fehlgeschlagen."
+
+#: includes/class-wc-tpp-settings.php
+msgid "Activation failed."
+msgstr "Aktivierung fehlgeschlagen."
+
+#: includes/class-wc-tpp-settings.php
+msgid "Request failed. Please try again."
+msgstr "Anfrage fehlgeschlagen. Bitte versuchen Sie es erneut."