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/stable/symbol/async-dispose.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/async-dispose');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/async-iterator.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/async-iterator');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/description.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/description');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/dispose.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/dispose');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/for.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/for');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/has-instance.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/has-instance');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/index.js

@@ -0,0 +1,5 @@
+'use strict';
+var parent = require('../../es/symbol');
+require('../../modules/web.dom-collections.iterator');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/is-concat-spreadable.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/is-concat-spreadable');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/iterator.js

@@ -0,0 +1,5 @@
+'use strict';
+var parent = require('../../es/symbol/iterator');
+require('../../modules/web.dom-collections.iterator');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/key-for.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/key-for');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/match-all.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/match-all');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/match.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/match');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/replace.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/replace');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/search.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/search');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/species.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/species');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/split.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/split');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/to-primitive.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/to-primitive');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/to-string-tag.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/to-string-tag');
+
+module.exports = parent;

node_modules/core-js/stable/symbol/unscopables.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../es/symbol/unscopables');
+
+module.exports = parent;