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/shortcut/index.js

@@ -0,0 +1,42 @@
+import { createElement } from "react";
+/**
+ * Internal dependencies
+ */
+
+/**
+ * Shortcut component is used to display keyboard shortcuts, and it can be customized with a custom display and aria label if needed.
+ *
+ * ```jsx
+ * import { Shortcut } from '@wordpress/components';
+ *
+ * const MyShortcut = () => {
+ * 	return (
+ * 		<Shortcut shortcut={{ display: 'Ctrl + S', ariaLabel: 'Save' }} />
+ * 	);
+ * };
+ * ```
+ */
+function Shortcut(props) {
+  const {
+    shortcut,
+    className
+  } = props;
+  if (!shortcut) {
+    return null;
+  }
+  let displayText;
+  let ariaLabel;
+  if (typeof shortcut === 'string') {
+    displayText = shortcut;
+  }
+  if (shortcut !== null && typeof shortcut === 'object') {
+    displayText = shortcut.display;
+    ariaLabel = shortcut.ariaLabel;
+  }
+  return createElement("span", {
+    className: className,
+    "aria-label": ariaLabel
+  }, displayText);
+}
+export default Shortcut;
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/components/build-module/shortcut/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["Shortcut","props","shortcut","className","displayText","ariaLabel","display","createElement"],"sources":["@wordpress/components/src/shortcut/index.tsx"],"sourcesContent":["/**\n * Internal dependencies\n */\nimport type { ShortcutProps } from './types';\n\n/**\n * Shortcut component is used to display keyboard shortcuts, and it can be customized with a custom display and aria label if needed.\n *\n * ```jsx\n * import { Shortcut } from '@wordpress/components';\n *\n * const MyShortcut = () => {\n * \treturn (\n * \t\t<Shortcut shortcut={{ display: 'Ctrl + S', ariaLabel: 'Save' }} />\n * \t);\n * };\n * ```\n */\nfunction Shortcut( props: ShortcutProps ) {\n\tconst { shortcut, className } = props;\n\n\tif ( ! shortcut ) {\n\t\treturn null;\n\t}\n\n\tlet displayText;\n\tlet ariaLabel;\n\n\tif ( typeof shortcut === 'string' ) {\n\t\tdisplayText = shortcut;\n\t}\n\n\tif ( shortcut !== null && typeof shortcut === 'object' ) {\n\t\tdisplayText = shortcut.display;\n\t\tariaLabel = shortcut.ariaLabel;\n\t}\n\n\treturn (\n\t\t<span className={ className } aria-label={ ariaLabel }>\n\t\t\t{ displayText }\n\t\t</span>\n\t);\n}\n\nexport default Shortcut;\n"],"mappings":";AAAA;AACA;AACA;;AAGA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAASA,QAAQA,CAAEC,KAAoB,EAAG;EACzC,MAAM;IAAEC,QAAQ;IAAEC;EAAU,CAAC,GAAGF,KAAK;EAErC,IAAK,CAAEC,QAAQ,EAAG;IACjB,OAAO,IAAI;EACZ;EAEA,IAAIE,WAAW;EACf,IAAIC,SAAS;EAEb,IAAK,OAAOH,QAAQ,KAAK,QAAQ,EAAG;IACnCE,WAAW,GAAGF,QAAQ;EACvB;EAEA,IAAKA,QAAQ,KAAK,IAAI,IAAI,OAAOA,QAAQ,KAAK,QAAQ,EAAG;IACxDE,WAAW,GAAGF,QAAQ,CAACI,OAAO;IAC9BD,SAAS,GAAGH,QAAQ,CAACG,SAAS;EAC/B;EAEA,OACCE,aAAA;IAAMJ,SAAS,EAAGA,SAAW;IAAC,cAAaE;EAAW,GACnDD,WACG,CAAC;AAET;AAEA,eAAeJ,QAAQ"}

node_modules/@wordpress/components/build-module/shortcut/types.js

@@ -0,0 +1,2 @@
+export {};
+//# sourceMappingURL=types.js.map

node_modules/@wordpress/components/build-module/shortcut/types.js.map

@@ -0,0 +1 @@
+{"version":3,"names":[],"sources":["@wordpress/components/src/shortcut/types.ts"],"sourcesContent":["export type ShortcutProps = {\n\t/**\n\t * Classname to apply to the shortcut.\n\t */\n\tclassName?: string;\n\t/**\n\t * Shortcut configuration\n\t */\n\tshortcut?: string | { display: string; ariaLabel: string };\n};\n"],"mappings":""}