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/object/assign.js

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+'use strict';
+module.exports = require('../../full/object/assign');

node_modules/core-js/features/object/create.js

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+'use strict';
+module.exports = require('../../full/object/create');

node_modules/core-js/features/object/define-getter.js

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+'use strict';
+module.exports = require('../../full/object/define-getter');

node_modules/core-js/features/object/define-properties.js

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+'use strict';
+module.exports = require('../../full/object/define-properties');

node_modules/core-js/features/object/define-property.js

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

node_modules/core-js/features/object/define-setter.js

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+'use strict';
+module.exports = require('../../full/object/define-setter');

node_modules/core-js/features/object/entries.js

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

node_modules/core-js/features/object/freeze.js

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

node_modules/core-js/features/object/from-entries.js

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

node_modules/core-js/features/object/get-own-property-descriptor.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/object/get-own-property-descriptor');

node_modules/core-js/features/object/get-own-property-descriptors.js

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+'use strict';
+module.exports = require('../../full/object/get-own-property-descriptors');

node_modules/core-js/features/object/get-own-property-names.js

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+'use strict';
+module.exports = require('../../full/object/get-own-property-names');

node_modules/core-js/features/object/get-own-property-symbols.js

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+'use strict';
+module.exports = require('../../full/object/get-own-property-symbols');

node_modules/core-js/features/object/get-prototype-of.js

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+'use strict';
+module.exports = require('../../full/object/get-prototype-of');

node_modules/core-js/features/object/group-by.js

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+'use strict';
+module.exports = require('../../full/object/group-by');

node_modules/core-js/features/object/has-own.js

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+'use strict';
+module.exports = require('../../full/object/has-own');

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

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

node_modules/core-js/features/object/is-extensible.js

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+'use strict';
+module.exports = require('../../full/object/is-extensible');

node_modules/core-js/features/object/is-frozen.js

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+'use strict';
+module.exports = require('../../full/object/is-frozen');

node_modules/core-js/features/object/is-sealed.js

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+'use strict';
+module.exports = require('../../full/object/is-sealed');

node_modules/core-js/features/object/is.js

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+'use strict';
+module.exports = require('../../full/object/is');

node_modules/core-js/features/object/iterate-entries.js

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

node_modules/core-js/features/object/iterate-keys.js

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

node_modules/core-js/features/object/iterate-values.js

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

node_modules/core-js/features/object/keys.js

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+'use strict';
+module.exports = require('../../full/object/keys');

node_modules/core-js/features/object/lookup-getter.js

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+'use strict';
+module.exports = require('../../full/object/lookup-getter');

node_modules/core-js/features/object/lookup-setter.js

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+'use strict';
+module.exports = require('../../full/object/lookup-setter');

node_modules/core-js/features/object/prevent-extensions.js

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+'use strict';
+module.exports = require('../../full/object/prevent-extensions');

node_modules/core-js/features/object/proto.js

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+'use strict';
+module.exports = require('../../full/object/proto');

node_modules/core-js/features/object/seal.js

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+'use strict';
+module.exports = require('../../full/object/seal');

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

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+'use strict';
+module.exports = require('../../full/object/set-prototype-of');

node_modules/core-js/features/object/to-string.js

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+'use strict';
+module.exports = require('../../full/object/to-string');

node_modules/core-js/features/object/values.js

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+'use strict';
+module.exports = require('../../full/object/values');