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/toolbar/toolbar-item/index.js

@@ -0,0 +1,64 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _react = require("react");
+var Ariakit = _interopRequireWildcard(require("@ariakit/react"));
+var _element = require("@wordpress/element");
+var _warning = _interopRequireDefault(require("@wordpress/warning"));
+var _toolbarContext = _interopRequireDefault(require("../toolbar-context"));
+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
+ */
+// eslint-disable-next-line no-restricted-imports
+
+/**
+ * WordPress dependencies
+ */
+
+/**
+ * Internal dependencies
+ */
+
+function ToolbarItem({
+  children,
+  as: Component,
+  ...props
+}, ref) {
+  const accessibleToolbarStore = (0, _element.useContext)(_toolbarContext.default);
+  const isRenderProp = typeof children === 'function';
+  if (!isRenderProp && !Component) {
+    typeof SCRIPT_DEBUG !== "undefined" && SCRIPT_DEBUG === true ? (0, _warning.default)('`ToolbarItem` is a generic headless component. You must pass either a `children` prop as a function or an `as` prop as a component. ' + 'See https://developer.wordpress.org/block-editor/components/toolbar-item/') : void 0;
+    return null;
+  }
+  const allProps = {
+    ...props,
+    ref,
+    'data-toolbar-item': true
+  };
+  if (!accessibleToolbarStore) {
+    if (Component) {
+      return (0, _react.createElement)(Component, {
+        ...allProps
+      }, children);
+    }
+    if (!isRenderProp) {
+      return null;
+    }
+    return children(allProps);
+  }
+  const render = isRenderProp ? children : Component && (0, _react.createElement)(Component, null, children);
+  return (0, _react.createElement)(Ariakit.ToolbarItem, {
+    ...allProps,
+    store: accessibleToolbarStore,
+    render: render
+  });
+}
+var _default = (0, _element.forwardRef)(ToolbarItem);
+exports.default = _default;
+//# sourceMappingURL=index.js.map

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

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

@@ -0,0 +1,29 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _element = require("@wordpress/element");
+var _warning = _interopRequireDefault(require("@wordpress/warning"));
+/**
+ * WordPress dependencies
+ */
+
+function ToolbarItem({
+  children,
+  ...props
+}, ref) {
+  if (typeof children !== 'function') {
+    typeof SCRIPT_DEBUG !== "undefined" && SCRIPT_DEBUG === true ? (0, _warning.default)('`ToolbarItem` is a generic headless component that accepts only function children props') : void 0;
+    return null;
+  }
+  return children({
+    ...props,
+    ref
+  });
+}
+var _default = (0, _element.forwardRef)(ToolbarItem);
+exports.default = _default;
+//# sourceMappingURL=index.native.js.map

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

@@ -0,0 +1 @@
+{"version":3,"names":["_element","require","_warning","_interopRequireDefault","ToolbarItem","children","props","ref","SCRIPT_DEBUG","warning","_default","forwardRef","exports","default"],"sources":["@wordpress/components/src/toolbar/toolbar-item/index.native.js"],"sourcesContent":["/**\n * WordPress dependencies\n */\nimport { forwardRef } from '@wordpress/element';\nimport warning from '@wordpress/warning';\n\nfunction ToolbarItem( { children, ...props }, ref ) {\n\tif ( typeof children !== 'function' ) {\n\t\twarning(\n\t\t\t'`ToolbarItem` is a generic headless component that accepts only function children props'\n\t\t);\n\t\treturn null;\n\t}\n\treturn children( { ...props, ref } );\n}\n\nexport default forwardRef( ToolbarItem );\n"],"mappings":";;;;;;;AAGA,IAAAA,QAAA,GAAAC,OAAA;AACA,IAAAC,QAAA,GAAAC,sBAAA,CAAAF,OAAA;AAJA;AACA;AACA;;AAIA,SAASG,WAAWA,CAAE;EAAEC,QAAQ;EAAE,GAAGC;AAAM,CAAC,EAAEC,GAAG,EAAG;EACnD,IAAK,OAAOF,QAAQ,KAAK,UAAU,EAAG;IACrC,OAAAG,YAAA,oBAAAA,YAAA,gBAAAC,gBAAO,EACN,yFACD,CAAC;IACD,OAAO,IAAI;EACZ;EACA,OAAOJ,QAAQ,CAAE;IAAE,GAAGC,KAAK;IAAEC;EAAI,CAAE,CAAC;AACrC;AAAC,IAAAG,QAAA,GAEc,IAAAC,mBAAU,EAAEP,WAAY,CAAC;AAAAQ,OAAA,CAAAC,OAAA,GAAAH,QAAA"}

node_modules/@wordpress/components/build/toolbar/toolbar-item/types.js

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

node_modules/@wordpress/components/build/toolbar/toolbar-item/types.js.map

@@ -0,0 +1 @@
+{"version":3,"names":[],"sources":["@wordpress/components/src/toolbar/toolbar-item/types.ts"],"sourcesContent":["/**\n * External dependencies\n */\nimport type {\n\tReactElement,\n\tReactNode,\n\tElementType,\n\tHTMLAttributes,\n\tRefAttributes,\n} from 'react';\n\nexport type ToolbarItemProps = Omit< HTMLAttributes< any >, 'children' > & {\n\t/**\n\t * Component type that will be used to render the toolbar item.\n\t */\n\tas?: ElementType;\n\t/**\n\t * A function that receives the props that should be spread onto the element\n\t * that will be rendered as a toolbar item. If the `as` prop is not provided,\n\t * this prop will accept a ReactNode instead.\n\t */\n\tchildren?:\n\t\t| ReactNode\n\t\t| ( (\n\t\t\t\tprops: HTMLAttributes< any > & RefAttributes< any >\n\t\t  ) => ReactElement | null );\n};\n"],"mappings":""}