fix: prevent asset conflicts between React and Grid.js versions

Add coexistence checks to all enqueue methods to prevent loading
both React and Grid.js assets simultaneously.

Changes:
- ReactAdmin.php: Only enqueue React assets when ?react=1
- Init.php: Skip Grid.js when React active on admin pages
- Form.php, Coupon.php, Access.php: Restore classic assets when ?react=0
- Customer.php, Product.php, License.php: Add coexistence checks

Now the toggle between Classic and React versions works correctly.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

src/admin/api/client.js

@@ -24,6 +24,8 @@ export async function ajaxRequest(action, data = {}) {
         }
     });
 
+    console.log(`[AJAX] Sending request: ${action}`, { nonce: NONCE, data });
+
     try {
         const response = await fetch(API_BASE, {
             method: 'POST',
@@ -31,10 +33,14 @@ export async function ajaxRequest(action, data = {}) {
             body: formData,
         });
 
+        console.log(`[AJAX] Response status: ${action}`, response.status);
+
         const result = await response.json();
+        console.log(`[AJAX] Response data: ${action}`, result);
 
         if (!response.ok || result.success === false) {
-            throw new Error(result.message || 'Request failed');
+            const errorMsg = result.data?.message || result.message || 'Request failed';
+            throw new Error(errorMsg);
         }
 
         return result;
@@ -76,21 +82,21 @@ export async function apiRequest(endpoint, options = {}) {
  * Orders API
  */
 export const ordersApi = {
-    list: (params = {}) => ajaxRequest('formipay_tabledata_orders', params),
-    get: (orderId) => ajaxRequest('formipay_get_order', { order_id: orderId }),
-    updateStatus: (orderId, status) => ajaxRequest('formipay_update_order_status', {
+    list: (params = {}) => ajaxRequest('formipay-tabledata-orders', params),
+    get: (orderId) => ajaxRequest('formipay-get-order', { order_id: orderId }),
+    updateStatus: (orderId, status) => ajaxRequest('formipay-update-order-status', {
         order_id: orderId,
         status,
     }),
-    delete: (orderIds) => ajaxRequest('formipay_bulk_delete_order', { ids: orderIds }),
+    delete: (orderIds) => ajaxRequest('formipay-bulk-delete-order', { ids: orderIds }),
 };
 
 /**
  * Customers API
  */
 export const customersApi = {
-    list: (params = {}) => ajaxRequest('formipay_tabledata_customers', params),
-    get: (customerId) => ajaxRequest('formipay_get_customer', { customer_id: customerId }),
+    list: (params = {}) => ajaxRequest('formipay-tabledata-customers', params),
+    get: (customerId) => ajaxRequest('formipay-get-customer', { customer_id: customerId }),
 };
 
 /**
@@ -106,16 +112,28 @@ export const productsApi = {
  * Forms API
  */
 export const formsApi = {
-    list: (params = {}) => ajaxRequest('formipay_tabledata_forms', params),
-    get: (formId) => ajaxRequest('formipay_get_form', { post_id: formId }),
+    list: (params = {}) => ajaxRequest('formipay-tabledata-forms', params),
+    get: (formId) => ajaxRequest('formipay-get-form', { post_id: formId }),
 };
 
 /**
  * Coupons API
  */
 export const couponsApi = {
-    list: (params = {}) => ajaxRequest('formipay_tabledata_coupons', params),
-    check: (code, formId) => ajaxRequest('formipay_check_coupon', { code, form_id: formId }),
+    list: (params = {}) => ajaxRequest('formipay-tabledata-coupons', params),
+    check: (code, formId) => ajaxRequest('formipay-check-coupon', { code, form_id: formId }),
+    create: (data) => ajaxRequest('formipay-create-coupon-post', data),
+    delete: (ids) => ajaxRequest('formipay-bulk-delete-coupon', { ids }),
+};
+
+/**
+ * Access Items API
+ */
+export const accessApi = {
+    list: (params = {}) => ajaxRequest('formipay-tabledata-access-items', params),
+    getProducts: () => ajaxRequest('formipay_access_items_get_products', {}),
+    create: (data) => ajaxRequest('formipay-create-access-item-post', data),
+    delete: (ids) => ajaxRequest('formipay-bulk-delete-access-item', { ids }),
 };
 
 /**