debug: Add comprehensive logging for toggle issue

Added debug logging to identify where enabled status is lost.

Backend Logging:
- Log what instance_settings["enabled"] value is read from DB
- Log the computed is_enabled boolean
- Log for both regular zones and Rest of World zone

Frontend Logging:
- Log all fetched zones data
- Log each method's enabled status
- Console output for easy debugging

This will show us:
1. What WooCommerce stores in DB
2. What backend reads from DB
3. What backend returns to frontend
4. What frontend receives
5. What frontend displays

Next: Check console + error logs to find the disconnect

includes/Api/ShippingController.php

@@ -102,6 +102,16 @@ class ShippingController extends WP_REST_Controller {
 					$method->init_instance_settings();
 					$is_enabled = isset( $method->instance_settings['enabled'] ) && $method->instance_settings['enabled'] === 'yes';
 					
+					// Debug: Log what we're reading
+					error_log( sprintf( 
+						'[WooNooW] Zone %d Method %s (instance %d): enabled setting = "%s", is_enabled = %s',
+						$zone_data['id'],
+						$method->id,
+						$method->instance_id,
+						isset( $method->instance_settings['enabled'] ) ? $method->instance_settings['enabled'] : 'NOT SET',
+						$is_enabled ? 'true' : 'false'
+					) );
+					
 					$rate = array(
 						'id'          => $method->id . ':' . $method->instance_id,
 						'instance_id' => $method->instance_id,
@@ -146,6 +156,15 @@ class ShippingController extends WP_REST_Controller {
 				$method->init_instance_settings();
 				$is_enabled = isset( $method->instance_settings['enabled'] ) && $method->instance_settings['enabled'] === 'yes';
 				
+				// Debug: Log what we're reading
+				error_log( sprintf( 
+					'[WooNooW] Zone 0 (Rest of World) Method %s (instance %d): enabled setting = "%s", is_enabled = %s',
+					$method->id,
+					$method->instance_id,
+					isset( $method->instance_settings['enabled'] ) ? $method->instance_settings['enabled'] : 'NOT SET',
+					$is_enabled ? 'true' : 'false'
+				) );
+				
 				$rate = array(
 					'id'          => $method->id . ':' . $method->instance_id,
 					'instance_id' => $method->instance_id,