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>

node_modules/core-js/es/reflect/apply.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.apply');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.apply;

node_modules/core-js/es/reflect/construct.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.construct');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.construct;

node_modules/core-js/es/reflect/define-property.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.define-property');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.defineProperty;

node_modules/core-js/es/reflect/delete-property.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.delete-property');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.deleteProperty;

node_modules/core-js/es/reflect/get-own-property-descriptor.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.get-own-property-descriptor');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.getOwnPropertyDescriptor;

node_modules/core-js/es/reflect/get-prototype-of.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.get-prototype-of');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.getPrototypeOf;

node_modules/core-js/es/reflect/get.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.get');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.get;

node_modules/core-js/es/reflect/has.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.has');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.has;

node_modules/core-js/es/reflect/index.js

@@ -0,0 +1,19 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.reflect.apply');
+require('../../modules/es.reflect.construct');
+require('../../modules/es.reflect.define-property');
+require('../../modules/es.reflect.delete-property');
+require('../../modules/es.reflect.get');
+require('../../modules/es.reflect.get-own-property-descriptor');
+require('../../modules/es.reflect.get-prototype-of');
+require('../../modules/es.reflect.has');
+require('../../modules/es.reflect.is-extensible');
+require('../../modules/es.reflect.own-keys');
+require('../../modules/es.reflect.prevent-extensions');
+require('../../modules/es.reflect.set');
+require('../../modules/es.reflect.set-prototype-of');
+require('../../modules/es.reflect.to-string-tag');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect;

node_modules/core-js/es/reflect/is-extensible.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.is-extensible');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.isExtensible;

node_modules/core-js/es/reflect/own-keys.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.own-keys');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.ownKeys;

node_modules/core-js/es/reflect/prevent-extensions.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.prevent-extensions');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.preventExtensions;

node_modules/core-js/es/reflect/set-prototype-of.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.set-prototype-of');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.setPrototypeOf;

node_modules/core-js/es/reflect/set.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.reflect.set');
+var path = require('../../internals/path');
+
+module.exports = path.Reflect.set;

node_modules/core-js/es/reflect/to-string-tag.js

@@ -0,0 +1,5 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.reflect.to-string-tag');
+
+module.exports = 'Reflect';