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/math/acosh.js

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+'use strict';
+module.exports = require('../../full/math/acosh');

node_modules/core-js/features/math/asinh.js

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

node_modules/core-js/features/math/atanh.js

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

node_modules/core-js/features/math/cbrt.js

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

node_modules/core-js/features/math/clamp.js

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+'use strict';
+module.exports = require('../../full/math/clamp');

node_modules/core-js/features/math/clz32.js

@@ -0,0 +1,2 @@
+'use strict';
+module.exports = require('../../full/math/clz32');

node_modules/core-js/features/math/cosh.js

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

node_modules/core-js/features/math/deg-per-rad.js

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

node_modules/core-js/features/math/degrees.js

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+'use strict';
+module.exports = require('../../full/math/degrees');

node_modules/core-js/features/math/expm1.js

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+'use strict';
+module.exports = require('../../full/math/expm1');

node_modules/core-js/features/math/f16round.js

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+'use strict';
+module.exports = require('../../full/math/f16round');

node_modules/core-js/features/math/fround.js

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+'use strict';
+module.exports = require('../../full/math/fround');

node_modules/core-js/features/math/fscale.js

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+'use strict';
+module.exports = require('../../full/math/fscale');

node_modules/core-js/features/math/hypot.js

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+'use strict';
+module.exports = require('../../full/math/hypot');

node_modules/core-js/features/math/iaddh.js

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

node_modules/core-js/features/math/imul.js

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

node_modules/core-js/features/math/imulh.js

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

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

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

node_modules/core-js/features/math/isubh.js

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+'use strict';
+module.exports = require('../../full/math/isubh');

node_modules/core-js/features/math/log10.js

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+'use strict';
+module.exports = require('../../full/math/log10');

node_modules/core-js/features/math/log1p.js

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+'use strict';
+module.exports = require('../../full/math/log1p');

node_modules/core-js/features/math/log2.js

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+'use strict';
+module.exports = require('../../full/math/log2');

node_modules/core-js/features/math/rad-per-deg.js

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+'use strict';
+module.exports = require('../../full/math/rad-per-deg');

node_modules/core-js/features/math/radians.js

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+'use strict';
+module.exports = require('../../full/math/radians');

node_modules/core-js/features/math/scale.js

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

node_modules/core-js/features/math/seeded-prng.js

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+'use strict';
+module.exports = require('../../full/math/seeded-prng');

node_modules/core-js/features/math/sign.js

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+'use strict';
+module.exports = require('../../full/math/sign');

node_modules/core-js/features/math/signbit.js

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

node_modules/core-js/features/math/sinh.js

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

node_modules/core-js/features/math/sum-precise.js

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+'use strict';
+module.exports = require('../../full/math/sum-precise');

node_modules/core-js/features/math/tanh.js

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

node_modules/core-js/features/math/to-string-tag.js

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

node_modules/core-js/features/math/trunc.js

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

node_modules/core-js/features/math/umulh.js

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+'use strict';
+module.exports = require('../../full/math/umulh');