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-module/toggle-group-control/toggle-group-control-option/component.js

@@ -0,0 +1,51 @@
+import { createElement } from "react";
+/**
+ * External dependencies
+ */
+
+/**
+ * WordPress dependencies
+ */
+import { forwardRef } from '@wordpress/element';
+
+/**
+ * Internal dependencies
+ */
+
+import { ToggleGroupControlOptionBase } from '../toggle-group-control-option-base';
+function UnforwardedToggleGroupControlOption(props, ref) {
+  const {
+    label,
+    ...restProps
+  } = props;
+  const optionLabel = restProps['aria-label'] || label;
+  return createElement(ToggleGroupControlOptionBase, {
+    ...restProps,
+    "aria-label": optionLabel,
+    ref: ref
+  }, label);
+}
+
+/**
+ * `ToggleGroupControlOption` is a form component and is meant to be used as a
+ * child of `ToggleGroupControl`.
+ *
+ * ```jsx
+ * import {
+ *   __experimentalToggleGroupControl as ToggleGroupControl,
+ *   __experimentalToggleGroupControlOption as ToggleGroupControlOption,
+ * } from '@wordpress/components';
+ *
+ * function Example() {
+ *   return (
+ *     <ToggleGroupControl label="my label" value="vertical" isBlock>
+ *       <ToggleGroupControlOption value="horizontal" label="Horizontal" />
+ *       <ToggleGroupControlOption value="vertical" label="Vertical" />
+ *     </ToggleGroupControl>
+ *   );
+ * }
+ * ```
+ */
+export const ToggleGroupControlOption = forwardRef(UnforwardedToggleGroupControlOption);
+export default ToggleGroupControlOption;
+//# sourceMappingURL=component.js.map

node_modules/@wordpress/components/build-module/toggle-group-control/toggle-group-control-option/component.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["forwardRef","ToggleGroupControlOptionBase","UnforwardedToggleGroupControlOption","props","ref","label","restProps","optionLabel","createElement","ToggleGroupControlOption"],"sources":["@wordpress/components/src/toggle-group-control/toggle-group-control-option/component.tsx"],"sourcesContent":["/**\n * External dependencies\n */\nimport type { ForwardedRef } from 'react';\n\n/**\n * WordPress dependencies\n */\nimport { forwardRef } from '@wordpress/element';\n\n/**\n * Internal dependencies\n */\nimport type { WordPressComponentProps } from '../../context';\nimport type { ToggleGroupControlOptionProps } from '../types';\nimport { ToggleGroupControlOptionBase } from '../toggle-group-control-option-base';\n\nfunction UnforwardedToggleGroupControlOption(\n\tprops: WordPressComponentProps<\n\t\tToggleGroupControlOptionProps,\n\t\t'button',\n\t\tfalse\n\t>,\n\tref: ForwardedRef< any >\n) {\n\tconst { label, ...restProps } = props;\n\tconst optionLabel = restProps[ 'aria-label' ] || label;\n\treturn (\n\t\t<ToggleGroupControlOptionBase\n\t\t\t{ ...restProps }\n\t\t\taria-label={ optionLabel }\n\t\t\tref={ ref }\n\t\t>\n\t\t\t{ label }\n\t\t</ToggleGroupControlOptionBase>\n\t);\n}\n\n/**\n * `ToggleGroupControlOption` is a form component and is meant to be used as a\n * child of `ToggleGroupControl`.\n *\n * ```jsx\n * import {\n *   __experimentalToggleGroupControl as ToggleGroupControl,\n *   __experimentalToggleGroupControlOption as ToggleGroupControlOption,\n * } from '@wordpress/components';\n *\n * function Example() {\n *   return (\n *     <ToggleGroupControl label=\"my label\" value=\"vertical\" isBlock>\n *       <ToggleGroupControlOption value=\"horizontal\" label=\"Horizontal\" />\n *       <ToggleGroupControlOption value=\"vertical\" label=\"Vertical\" />\n *     </ToggleGroupControl>\n *   );\n * }\n * ```\n */\nexport const ToggleGroupControlOption = forwardRef(\n\tUnforwardedToggleGroupControlOption\n);\n\nexport default ToggleGroupControlOption;\n"],"mappings":";AAAA;AACA;AACA;;AAGA;AACA;AACA;AACA,SAASA,UAAU,QAAQ,oBAAoB;;AAE/C;AACA;AACA;;AAGA,SAASC,4BAA4B,QAAQ,qCAAqC;AAElF,SAASC,mCAAmCA,CAC3CC,KAIC,EACDC,GAAwB,EACvB;EACD,MAAM;IAAEC,KAAK;IAAE,GAAGC;EAAU,CAAC,GAAGH,KAAK;EACrC,MAAMI,WAAW,GAAGD,SAAS,CAAE,YAAY,CAAE,IAAID,KAAK;EACtD,OACCG,aAAA,CAACP,4BAA4B;IAAA,GACvBK,SAAS;IACd,cAAaC,WAAa;IAC1BH,GAAG,EAAGA;EAAK,GAETC,KAC2B,CAAC;AAEjC;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,OAAO,MAAMI,wBAAwB,GAAGT,UAAU,CACjDE,mCACD,CAAC;AAED,eAAeO,wBAAwB"}

node_modules/@wordpress/components/build-module/toggle-group-control/toggle-group-control-option/index.js

@@ -0,0 +1,2 @@
+export { default as ToggleGroupControlOption } from './component';
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build-module/toggle-group-control/toggle-group-control-option/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["default","ToggleGroupControlOption"],"sources":["@wordpress/components/src/toggle-group-control/toggle-group-control-option/index.ts"],"sourcesContent":["export { default as ToggleGroupControlOption } from './component';\n"],"mappings":"AAAA,SAASA,OAAO,IAAIC,wBAAwB,QAAQ,aAAa"}