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/form-toggle/index.js

@@ -0,0 +1,68 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.FormToggle = FormToggle;
+exports.noop = exports.default = void 0;
+var _react = require("react");
+var _classnames = _interopRequireDefault(require("classnames"));
+/**
+ * External dependencies
+ */
+
+const noop = () => {};
+
+/**
+ * FormToggle switches a single setting on or off.
+ *
+ * ```jsx
+ * import { FormToggle } from '@wordpress/components';
+ * import { useState } from '@wordpress/element';
+ *
+ * const MyFormToggle = () => {
+ *   const [ isChecked, setChecked ] = useState( true );
+ *
+ *   return (
+ *     <FormToggle
+ *       checked={ isChecked }
+ *       onChange={ () => setChecked( ( state ) => ! state ) }
+ *     />
+ *   );
+ * };
+ * ```
+ */
+exports.noop = noop;
+function FormToggle(props) {
+  const {
+    className,
+    checked,
+    id,
+    disabled,
+    onChange = noop,
+    ...additionalProps
+  } = props;
+  const wrapperClasses = (0, _classnames.default)('components-form-toggle', className, {
+    'is-checked': checked,
+    'is-disabled': disabled
+  });
+  return (0, _react.createElement)("span", {
+    className: wrapperClasses
+  }, (0, _react.createElement)("input", {
+    className: "components-form-toggle__input",
+    id: id,
+    type: "checkbox",
+    checked: checked,
+    onChange: onChange,
+    disabled: disabled,
+    ...additionalProps
+  }), (0, _react.createElement)("span", {
+    className: "components-form-toggle__track"
+  }), (0, _react.createElement)("span", {
+    className: "components-form-toggle__thumb"
+  }));
+}
+var _default = FormToggle;
+exports.default = _default;
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build/form-toggle/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["_classnames","_interopRequireDefault","require","noop","exports","FormToggle","props","className","checked","id","disabled","onChange","additionalProps","wrapperClasses","classnames","_react","createElement","type","_default","default"],"sources":["@wordpress/components/src/form-toggle/index.tsx"],"sourcesContent":["/**\n * External dependencies\n */\nimport classnames from 'classnames';\n\n/**\n * Internal dependencies\n */\nimport type { FormToggleProps } from './types';\nimport type { WordPressComponentProps } from '../context';\n\nexport const noop = () => {};\n\n/**\n * FormToggle switches a single setting on or off.\n *\n * ```jsx\n * import { FormToggle } from '@wordpress/components';\n * import { useState } from '@wordpress/element';\n *\n * const MyFormToggle = () => {\n *   const [ isChecked, setChecked ] = useState( true );\n *\n *   return (\n *     <FormToggle\n *       checked={ isChecked }\n *       onChange={ () => setChecked( ( state ) => ! state ) }\n *     />\n *   );\n * };\n * ```\n */\nexport function FormToggle(\n\tprops: WordPressComponentProps< FormToggleProps, 'input', false >\n) {\n\tconst {\n\t\tclassName,\n\t\tchecked,\n\t\tid,\n\t\tdisabled,\n\t\tonChange = noop,\n\t\t...additionalProps\n\t} = props;\n\tconst wrapperClasses = classnames( 'components-form-toggle', className, {\n\t\t'is-checked': checked,\n\t\t'is-disabled': disabled,\n\t} );\n\n\treturn (\n\t\t<span className={ wrapperClasses }>\n\t\t\t<input\n\t\t\t\tclassName=\"components-form-toggle__input\"\n\t\t\t\tid={ id }\n\t\t\t\ttype=\"checkbox\"\n\t\t\t\tchecked={ checked }\n\t\t\t\tonChange={ onChange }\n\t\t\t\tdisabled={ disabled }\n\t\t\t\t{ ...additionalProps }\n\t\t\t/>\n\t\t\t<span className=\"components-form-toggle__track\"></span>\n\t\t\t<span className=\"components-form-toggle__thumb\"></span>\n\t\t</span>\n\t);\n}\n\nexport default FormToggle;\n"],"mappings":";;;;;;;;;AAGA,IAAAA,WAAA,GAAAC,sBAAA,CAAAC,OAAA;AAHA;AACA;AACA;;AASO,MAAMC,IAAI,GAAGA,CAAA,KAAM,CAAC,CAAC;;AAE5B;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AAlBAC,OAAA,CAAAD,IAAA,GAAAA,IAAA;AAmBO,SAASE,UAAUA,CACzBC,KAAiE,EAChE;EACD,MAAM;IACLC,SAAS;IACTC,OAAO;IACPC,EAAE;IACFC,QAAQ;IACRC,QAAQ,GAAGR,IAAI;IACf,GAAGS;EACJ,CAAC,GAAGN,KAAK;EACT,MAAMO,cAAc,GAAG,IAAAC,mBAAU,EAAE,wBAAwB,EAAEP,SAAS,EAAE;IACvE,YAAY,EAAEC,OAAO;IACrB,aAAa,EAAEE;EAChB,CAAE,CAAC;EAEH,OACC,IAAAK,MAAA,CAAAC,aAAA;IAAMT,SAAS,EAAGM;EAAgB,GACjC,IAAAE,MAAA,CAAAC,aAAA;IACCT,SAAS,EAAC,+BAA+B;IACzCE,EAAE,EAAGA,EAAI;IACTQ,IAAI,EAAC,UAAU;IACfT,OAAO,EAAGA,OAAS;IACnBG,QAAQ,EAAGA,QAAU;IACrBD,QAAQ,EAAGA,QAAU;IAAA,GAChBE;EAAe,CACpB,CAAC,EACF,IAAAG,MAAA,CAAAC,aAAA;IAAMT,SAAS,EAAC;EAA+B,CAAO,CAAC,EACvD,IAAAQ,MAAA,CAAAC,aAAA;IAAMT,SAAS,EAAC;EAA+B,CAAO,CACjD,CAAC;AAET;AAAC,IAAAW,QAAA,GAEcb,UAAU;AAAAD,OAAA,CAAAe,OAAA,GAAAD,QAAA"}

node_modules/@wordpress/components/build/form-toggle/types.js

@@ -0,0 +1,6 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+//# sourceMappingURL=types.js.map

node_modules/@wordpress/components/build/form-toggle/types.js.map

@@ -0,0 +1 @@
+{"version":3,"names":[],"sources":["@wordpress/components/src/form-toggle/types.ts"],"sourcesContent":["/**\n * External dependencies\n */\nimport type { ChangeEvent } from 'react';\n\nexport type FormToggleProps = {\n\t/**\n\t * If checked is true the toggle will be checked. If checked is false the\n\t * toggle will be unchecked. If no value is passed the toggle will be\n\t * unchecked.\n\t */\n\tchecked?: boolean;\n\t/**\n\t * If disabled is true the toggle will be disabled and apply the appropriate\n\t * styles.\n\t */\n\tdisabled?: boolean;\n\t/**\n\t * A callback function invoked when the toggle is clicked.\n\t */\n\tonChange: ( event: ChangeEvent< HTMLInputElement > ) => void;\n};\n"],"mappings":""}