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/promise/all-settled.js

@@ -0,0 +1,16 @@
+'use strict';
+require('../../modules/es.array.iterator');
+require('../../modules/es.object.to-string');
+require('../../modules/es.promise');
+require('../../modules/es.promise.all-settled');
+require('../../modules/es.string.iterator');
+var call = require('../../internals/function-call');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Promise = path.Promise;
+var $allSettled = Promise.allSettled;
+
+module.exports = function allSettled(iterable) {
+  return call($allSettled, isCallable(this) ? this : Promise, iterable);
+};

node_modules/core-js/es/promise/any.js

@@ -0,0 +1,17 @@
+'use strict';
+require('../../modules/es.aggregate-error');
+require('../../modules/es.array.iterator');
+require('../../modules/es.object.to-string');
+require('../../modules/es.promise');
+require('../../modules/es.promise.any');
+require('../../modules/es.string.iterator');
+var call = require('../../internals/function-call');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Promise = path.Promise;
+var $any = Promise.any;
+
+module.exports = function any(iterable) {
+  return call($any, isCallable(this) ? this : Promise, iterable);
+};

node_modules/core-js/es/promise/finally.js

@@ -0,0 +1,7 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.promise');
+require('../../modules/es.promise.finally');
+var entryUnbind = require('../../internals/entry-unbind');
+
+module.exports = entryUnbind('Promise', 'finally');

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

@@ -0,0 +1,14 @@
+'use strict';
+require('../../modules/es.aggregate-error');
+require('../../modules/es.array.iterator');
+require('../../modules/es.object.to-string');
+require('../../modules/es.promise');
+require('../../modules/es.promise.all-settled');
+require('../../modules/es.promise.any');
+require('../../modules/es.promise.try');
+require('../../modules/es.promise.with-resolvers');
+require('../../modules/es.promise.finally');
+require('../../modules/es.string.iterator');
+var path = require('../../internals/path');
+
+module.exports = path.Promise;

node_modules/core-js/es/promise/try.js

@@ -0,0 +1,15 @@
+'use strict';
+require('../../modules/es.object.to-string');
+require('../../modules/es.promise');
+require('../../modules/es.promise.try');
+var apply = require('../../internals/function-apply');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Promise = path.Promise;
+var $try = Promise['try'];
+
+// eslint-disable-next-line no-unused-vars -- required for arity
+module.exports = { 'try': function (callbackfn /* , ...args */) {
+  return apply($try, isCallable(this) ? this : Promise, arguments);
+} }['try'];

node_modules/core-js/es/promise/with-resolvers.js

@@ -0,0 +1,13 @@
+'use strict';
+require('../../modules/es.promise');
+require('../../modules/es.promise.with-resolvers');
+var call = require('../../internals/function-call');
+var isCallable = require('../../internals/is-callable');
+var path = require('../../internals/path');
+
+var Promise = path.Promise;
+var promiseWithResolvers = Promise.withResolvers;
+
+module.exports = function withResolvers() {
+  return call(promiseWithResolvers, isCallable(this) ? this : Promise);
+};