Implement version 0.0.8 features

- Remove Current Version field from product license settings
- Derive current version from latest product version in database
- Refactor email system to use WooCommerce email notification classes
- Add LicenseExpirationEmail WC_Email class for expiration warnings
- Add customizable email templates (HTML and plain text)
- Update settings to link to WooCommerce email configuration
- Update translations for new email-related strings

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

src/Admin/SettingsController.php

@@ -92,6 +92,44 @@ final class SettingsController
                 'type' => 'sectionend',
                 'id' => 'wc_licensed_product_section_defaults_end',
             ],
+            // Email settings section
+            'email_section_title' => [
+                'name' => __('Expiration Warning Schedule', 'wc-licensed-product'),
+                'type' => 'title',
+                'desc' => sprintf(
+                    /* translators: %s: URL to WooCommerce email settings */
+                    __('Configure when expiration warning emails are sent. To customize the email template, enable/disable, or change the subject, go to %s.', 'wc-licensed-product'),
+                    '<a href="' . esc_url(admin_url('admin.php?page=wc-settings&tab=email&section=wclp_license_expiration')) . '">' .
+                    __('WooCommerce > Settings > Emails > License Expiration Warning', 'wc-licensed-product') . '</a>'
+                ),
+                'id' => 'wc_licensed_product_section_email',
+            ],
+            'expiration_warning_days_first' => [
+                'name' => __('First Warning (Days Before)', 'wc-licensed-product'),
+                'type' => 'number',
+                'desc' => __('Days before expiration to send the first warning email.', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_expiration_warning_days_first',
+                'default' => '7',
+                'custom_attributes' => [
+                    'min' => '1',
+                    'step' => '1',
+                ],
+            ],
+            'expiration_warning_days_second' => [
+                'name' => __('Second Warning (Days Before)', 'wc-licensed-product'),
+                'type' => 'number',
+                'desc' => __('Days before expiration to send the second warning email. Set to 0 to disable.', 'wc-licensed-product'),
+                'id' => 'wc_licensed_product_expiration_warning_days_second',
+                'default' => '1',
+                'custom_attributes' => [
+                    'min' => '0',
+                    'step' => '1',
+                ],
+            ],
+            'email_section_end' => [
+                'type' => 'sectionend',
+                'id' => 'wc_licensed_product_section_email_end',
+            ],
         ];
     }
 
@@ -139,4 +177,37 @@ final class SettingsController
     {
         return get_option('wc_licensed_product_default_bind_to_version', 'no') === 'yes';
     }
+
+    /**
+     * Check if expiration warning emails are enabled
+     * This checks both the WooCommerce email setting and the old setting for backwards compatibility
+     */
+    public static function isExpirationEmailsEnabled(): bool
+    {
+        // Check WooCommerce email enabled status
+        $emailEnabled = get_option('woocommerce_wclp_license_expiration_settings');
+        if (is_array($emailEnabled) && isset($emailEnabled['enabled'])) {
+            return $emailEnabled['enabled'] === 'yes';
+        }
+        // Default to enabled if not yet configured
+        return true;
+    }
+
+    /**
+     * Get first warning days before expiration
+     */
+    public static function getFirstWarningDays(): int
+    {
+        $value = get_option('wc_licensed_product_expiration_warning_days_first', 7);
+        return max(1, (int) $value);
+    }
+
+    /**
+     * Get second warning days before expiration
+     */
+    public static function getSecondWarningDays(): int
+    {
+        $value = get_option('wc_licensed_product_expiration_warning_days_second', 1);
+        return max(0, (int) $value);
+    }
 }

src/Admin/VersionAdminController.php

@@ -263,9 +263,6 @@ final class VersionAdminController
             wp_send_json_error(['message' => __('Failed to create version.', 'wc-licensed-product')]);
         }
 
-        // Also update the product's current version meta
-        update_post_meta($productId, '_licensed_current_version', $version);
-
         wp_send_json_success([
             'message' => __('Version added successfully.', 'wc-licensed-product'),
             'version' => $newVersion->toArray(),