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/full/weak-map/delete-all.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.weak-map');
+require('../../modules/esnext.weak-map.delete-all');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('WeakMap', 'deleteAll');

node_modules/core-js/full/weak-map/emplace.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.weak-map');
+require('../../modules/esnext.weak-map.emplace');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('WeakMap', 'emplace');

node_modules/core-js/full/weak-map/from.js

@@ -0,0 +1,14 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.array.iterator');
+require('../../modules/es.string.iterator');
+require('../../modules/es.weak-map');
+require('../../modules/esnext.weak-map.from');
+require('../../modules/esnext.weak-map.delete-all');
+require('../../modules/esnext.weak-map.emplace');
+require('../../modules/esnext.weak-map.get-or-insert');
+require('../../modules/esnext.weak-map.get-or-insert-computed');
+require('../../modules/web.dom-collections.iterator');
+var path = require('../../internals/path');
+
+module.exports = path.WeakMap.from;

node_modules/core-js/full/weak-map/get-or-insert-computed.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../actual/weak-map/get-or-insert-computed');
+
+module.exports = parent;

node_modules/core-js/full/weak-map/get-or-insert.js

@@ -0,0 +1,4 @@
+'use strict';
+var parent = require('../../actual/weak-map/get-or-insert');
+
+module.exports = parent;

node_modules/core-js/full/weak-map/index.js

@@ -0,0 +1,13 @@
+'use strict';
+var parent = require('../../actual/weak-map');
+require('../../modules/es.string.iterator');
+require('../../modules/esnext.weak-map.from');
+require('../../modules/esnext.weak-map.of');
+require('../../modules/esnext.weak-map.emplace');
+require('../../modules/esnext.weak-map.get-or-insert');
+require('../../modules/esnext.weak-map.get-or-insert-computed');
+require('../../modules/esnext.weak-map.delete-all');
+// TODO: remove from `core-js@4`
+require('../../modules/esnext.weak-map.upsert');
+
+module.exports = parent;

node_modules/core-js/full/weak-map/of.js

@@ -0,0 +1,12 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.array.iterator');
+require('../../modules/es.weak-map');
+require('../../modules/esnext.weak-map.of');
+require('../../modules/esnext.weak-map.delete-all');
+require('../../modules/esnext.weak-map.emplace');
+require('../../modules/esnext.weak-map.get-or-insert');
+require('../../modules/esnext.weak-map.get-or-insert-computed');
+var path = require('../../internals/path');
+
+module.exports = path.WeakMap.of;

node_modules/core-js/full/weak-map/upsert.js

@@ -0,0 +1,6 @@
+'use strict';
+require('../../modules/es.weak-map');
+require('../../modules/esnext.weak-map.upsert');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('WeakMap', 'upsert');