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/features/set/add-all.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/add-all');

node_modules/core-js/features/set/delete-all.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/delete-all');

node_modules/core-js/features/set/difference.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/difference');

node_modules/core-js/features/set/every.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/every');

node_modules/core-js/features/set/filter.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/filter');

node_modules/core-js/features/set/find.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/find');

node_modules/core-js/features/set/from.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/from');

node_modules/core-js/features/set/index.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set');

node_modules/core-js/features/set/intersection.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/intersection');

node_modules/core-js/features/set/is-disjoint-from.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/is-disjoint-from');

node_modules/core-js/features/set/is-subset-of.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/is-subset-of');

node_modules/core-js/features/set/is-superset-of.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/is-superset-of');

node_modules/core-js/features/set/join.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/join');

node_modules/core-js/features/set/map.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/map');

node_modules/core-js/features/set/of.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/of');

node_modules/core-js/features/set/reduce.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/reduce');

node_modules/core-js/features/set/some.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/some');

node_modules/core-js/features/set/symmetric-difference.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/symmetric-difference');

node_modules/core-js/features/set/union.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/set/union');