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/@wordpress/components/build/item-group/item/component.js

@@ -0,0 +1,59 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = exports.Item = void 0;
+var _react = require("react");
+var _hook = require("./hook");
+var _context = require("../../context");
+var _view = require("../../view");
+/**
+ * External dependencies
+ */
+
+/**
+ * Internal dependencies
+ */
+
+function UnconnectedItem(props, forwardedRef) {
+  const {
+    role,
+    wrapperClassName,
+    ...otherProps
+  } = (0, _hook.useItem)(props);
+  return (0, _react.createElement)("div", {
+    role: role,
+    className: wrapperClassName
+  }, (0, _react.createElement)(_view.View, {
+    ...otherProps,
+    ref: forwardedRef
+  }));
+}
+
+/**
+ * `Item` is used in combination with `ItemGroup` to display a list of items
+ * grouped and styled together.
+ *
+ * ```jsx
+ * import {
+ *   __experimentalItemGroup as ItemGroup,
+ *   __experimentalItem as Item,
+ * } from '@wordpress/components';
+ *
+ * function Example() {
+ *   return (
+ *     <ItemGroup>
+ *       <Item>Code</Item>
+ *       <Item>is</Item>
+ *       <Item>Poetry</Item>
+ *     </ItemGroup>
+ *   );
+ * }
+ * ```
+ */
+const Item = (0, _context.contextConnect)(UnconnectedItem, 'Item');
+exports.Item = Item;
+var _default = Item;
+exports.default = _default;
+//# sourceMappingURL=component.js.map

node_modules/@wordpress/components/build/item-group/item/component.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["_hook","require","_context","_view","UnconnectedItem","props","forwardedRef","role","wrapperClassName","otherProps","useItem","_react","createElement","className","View","ref","Item","contextConnect","exports","_default","default"],"sources":["@wordpress/components/src/item-group/item/component.tsx"],"sourcesContent":["/**\n * External dependencies\n */\nimport type { ForwardedRef } from 'react';\n\n/**\n * Internal dependencies\n */\nimport type { ItemProps } from '../types';\nimport { useItem } from './hook';\nimport type { WordPressComponentProps } from '../../context';\nimport { contextConnect } from '../../context';\nimport { View } from '../../view';\n\nfunction UnconnectedItem(\n\tprops: WordPressComponentProps< ItemProps, 'div' >,\n\tforwardedRef: ForwardedRef< any >\n) {\n\tconst { role, wrapperClassName, ...otherProps } = useItem( props );\n\n\treturn (\n\t\t<div role={ role } className={ wrapperClassName }>\n\t\t\t<View { ...otherProps } ref={ forwardedRef } />\n\t\t</div>\n\t);\n}\n\n/**\n * `Item` is used in combination with `ItemGroup` to display a list of items\n * grouped and styled together.\n *\n * ```jsx\n * import {\n *   __experimentalItemGroup as ItemGroup,\n *   __experimentalItem as Item,\n * } from '@wordpress/components';\n *\n * function Example() {\n *   return (\n *     <ItemGroup>\n *       <Item>Code</Item>\n *       <Item>is</Item>\n *       <Item>Poetry</Item>\n *     </ItemGroup>\n *   );\n * }\n * ```\n */\nexport const Item = contextConnect( UnconnectedItem, 'Item' );\n\nexport default Item;\n"],"mappings":";;;;;;;AASA,IAAAA,KAAA,GAAAC,OAAA;AAEA,IAAAC,QAAA,GAAAD,OAAA;AACA,IAAAE,KAAA,GAAAF,OAAA;AAZA;AACA;AACA;;AAGA;AACA;AACA;;AAOA,SAASG,eAAeA,CACvBC,KAAkD,EAClDC,YAAiC,EAChC;EACD,MAAM;IAAEC,IAAI;IAAEC,gBAAgB;IAAE,GAAGC;EAAW,CAAC,GAAG,IAAAC,aAAO,EAAEL,KAAM,CAAC;EAElE,OACC,IAAAM,MAAA,CAAAC,aAAA;IAAKL,IAAI,EAAGA,IAAM;IAACM,SAAS,EAAGL;EAAkB,GAChD,IAAAG,MAAA,CAAAC,aAAA,EAACT,KAAA,CAAAW,IAAI;IAAA,GAAML,UAAU;IAAGM,GAAG,EAAGT;EAAc,CAAE,CAC1C,CAAC;AAER;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACO,MAAMU,IAAI,GAAG,IAAAC,uBAAc,EAAEb,eAAe,EAAE,MAAO,CAAC;AAACc,OAAA,CAAAF,IAAA,GAAAA,IAAA;AAAA,IAAAG,QAAA,GAE/CH,IAAI;AAAAE,OAAA,CAAAE,OAAA,GAAAD,QAAA"}

node_modules/@wordpress/components/build/item-group/item/hook.js

@@ -0,0 +1,49 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.useItem = useItem;
+var _element = require("@wordpress/element");
+var _context = require("../../context");
+var styles = _interopRequireWildcard(require("../styles"));
+var _context2 = require("../context");
+var _useCx = require("../../utils/hooks/use-cx");
+function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
+function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
+/**
+ * External dependencies
+ */
+
+/**
+ * WordPress dependencies
+ */
+
+function useItem(props) {
+  const {
+    as: asProp,
+    className,
+    onClick,
+    role = 'listitem',
+    size: sizeProp,
+    ...otherProps
+  } = (0, _context.useContextSystem)(props, 'Item');
+  const {
+    spacedAround,
+    size: contextSize
+  } = (0, _context2.useItemGroupContext)();
+  const size = sizeProp || contextSize;
+  const as = asProp || (typeof onClick !== 'undefined' ? 'button' : 'div');
+  const cx = (0, _useCx.useCx)();
+  const classes = (0, _element.useMemo)(() => cx((as === 'button' || as === 'a') && styles.unstyledButton(as), styles.itemSizes[size] || styles.itemSizes.medium, styles.item, spacedAround && styles.spacedAround, className), [as, className, cx, size, spacedAround]);
+  const wrapperClassName = cx(styles.itemWrapper);
+  return {
+    as,
+    className: classes,
+    onClick,
+    wrapperClassName,
+    role,
+    ...otherProps
+  };
+}
+//# sourceMappingURL=hook.js.map

node_modules/@wordpress/components/build/item-group/item/hook.js.map

@@ -0,0 +1 @@
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node_modules/@wordpress/components/build/item-group/item/index.js

@@ -0,0 +1,21 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "default", {
+  enumerable: true,
+  get: function () {
+    return _component.default;
+  }
+});
+Object.defineProperty(exports, "useItem", {
+  enumerable: true,
+  get: function () {
+    return _hook.useItem;
+  }
+});
+var _component = _interopRequireDefault(require("./component"));
+var _hook = require("./hook");
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build/item-group/item/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["_component","_interopRequireDefault","require","_hook"],"sources":["@wordpress/components/src/item-group/item/index.ts"],"sourcesContent":["export { default } from './component';\nexport { useItem } from './hook';\n"],"mappings":";;;;;;;;;;;;;;;;;;AAAA,IAAAA,UAAA,GAAAC,sBAAA,CAAAC,OAAA;AACA,IAAAC,KAAA,GAAAD,OAAA"}