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/style-provider/index.js

@@ -0,0 +1,57 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.StyleProvider = StyleProvider;
+exports.default = void 0;
+var _react = require("react");
+var _react2 = require("@emotion/react");
+var _cache = _interopRequireDefault(require("@emotion/cache"));
+var uuid = _interopRequireWildcard(require("uuid"));
+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
+ */
+
+const uuidCache = new Set();
+// Use a weak map so that when the container is detached it's automatically
+// dereferenced to avoid memory leak.
+const containerCacheMap = new WeakMap();
+const memoizedCreateCacheWithContainer = container => {
+  if (containerCacheMap.has(container)) {
+    return containerCacheMap.get(container);
+  }
+
+  // Emotion only accepts alphabetical and hyphenated keys so we just
+  // strip the numbers from the UUID. It _should_ be fine.
+  let key = uuid.v4().replace(/[0-9]/g, '');
+  while (uuidCache.has(key)) {
+    key = uuid.v4().replace(/[0-9]/g, '');
+  }
+  uuidCache.add(key);
+  const cache = (0, _cache.default)({
+    container,
+    key
+  });
+  containerCacheMap.set(container, cache);
+  return cache;
+};
+function StyleProvider(props) {
+  const {
+    children,
+    document
+  } = props;
+  if (!document) {
+    return null;
+  }
+  const cache = memoizedCreateCacheWithContainer(document.head);
+  return (0, _react.createElement)(_react2.CacheProvider, {
+    value: cache
+  }, children);
+}
+var _default = StyleProvider;
+exports.default = _default;
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build/style-provider/index.js.map

@@ -0,0 +1 @@
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node_modules/@wordpress/components/build/style-provider/index.native.js

@@ -0,0 +1,12 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = StyleProvider;
+function StyleProvider({
+  children
+}) {
+  return children;
+}
+//# sourceMappingURL=index.native.js.map

node_modules/@wordpress/components/build/style-provider/index.native.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["StyleProvider","children"],"sources":["@wordpress/components/src/style-provider/index.native.js"],"sourcesContent":["export default function StyleProvider( { children } ) {\n\treturn children;\n}\n"],"mappings":";;;;;;AAAe,SAASA,aAAaA,CAAE;EAAEC;AAAS,CAAC,EAAG;EACrD,OAAOA,QAAQ;AAChB"}

node_modules/@wordpress/components/build/style-provider/types.js

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

node_modules/@wordpress/components/build/style-provider/types.js.map

@@ -0,0 +1 @@
+{"version":3,"names":[],"sources":["@wordpress/components/src/style-provider/types.ts"],"sourcesContent":["/**\n * External dependencies\n */\nimport type { ReactNode } from 'react';\n\nexport type StyleProviderProps = {\n\t/**\n\t * The children elements.\n\t */\n\tchildren: ReactNode;\n\t/**\n\t * Current document.\n\t */\n\tdocument: Document;\n};\n"],"mappings":""}