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/dashicon/index.js

@@ -0,0 +1,43 @@
+import { createElement } from "react";
+/**
+ * @typedef OwnProps
+ *
+ * @property {import('./types').IconKey} icon        Icon name
+ * @property {string}                    [className] Class name
+ * @property {number}                    [size]      Size of the icon
+ */
+
+/**
+ * Internal dependencies
+ */
+
+function Dashicon({
+  icon,
+  className,
+  size = 20,
+  style = {},
+  ...extraProps
+}) {
+  const iconClass = ['dashicon', 'dashicons', 'dashicons-' + icon, className].filter(Boolean).join(' ');
+
+  // For retro-compatibility reasons (for example if people are overriding icon size with CSS), we add inline styles just if the size is different to the default
+  const sizeStyles =
+  // using `!=` to catch both 20 and "20"
+  // eslint-disable-next-line eqeqeq
+  20 != size ? {
+    fontSize: `${size}px`,
+    width: `${size}px`,
+    height: `${size}px`
+  } : {};
+  const styles = {
+    ...sizeStyles,
+    ...style
+  };
+  return createElement("span", {
+    className: iconClass,
+    style: styles,
+    ...extraProps
+  });
+}
+export default Dashicon;
+//# sourceMappingURL=index.js.map

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

@@ -0,0 +1 @@
+{"version":3,"names":["Dashicon","icon","className","size","style","extraProps","iconClass","filter","Boolean","join","sizeStyles","fontSize","width","height","styles","createElement"],"sources":["@wordpress/components/src/dashicon/index.tsx"],"sourcesContent":["/**\n * @typedef OwnProps\n *\n * @property {import('./types').IconKey} icon        Icon name\n * @property {string}                    [className] Class name\n * @property {number}                    [size]      Size of the icon\n */\n\n/**\n * Internal dependencies\n */\nimport type { WordPressComponentProps } from '../context';\nimport type { DashiconProps } from './types';\n\nfunction Dashicon( {\n\ticon,\n\tclassName,\n\tsize = 20,\n\tstyle = {},\n\t...extraProps\n}: WordPressComponentProps< DashiconProps, 'span', false > ) {\n\tconst iconClass = [\n\t\t'dashicon',\n\t\t'dashicons',\n\t\t'dashicons-' + icon,\n\t\tclassName,\n\t]\n\t\t.filter( Boolean )\n\t\t.join( ' ' );\n\n\t// For retro-compatibility reasons (for example if people are overriding icon size with CSS), we add inline styles just if the size is different to the default\n\tconst sizeStyles =\n\t\t// using `!=` to catch both 20 and \"20\"\n\t\t// eslint-disable-next-line eqeqeq\n\t\t20 != size\n\t\t\t? {\n\t\t\t\t\tfontSize: `${ size }px`,\n\t\t\t\t\twidth: `${ size }px`,\n\t\t\t\t\theight: `${ size }px`,\n\t\t\t  }\n\t\t\t: {};\n\n\tconst styles = {\n\t\t...sizeStyles,\n\t\t...style,\n\t};\n\n\treturn <span className={ iconClass } style={ styles } { ...extraProps } />;\n}\n\nexport default Dashicon;\n"],"mappings":";AAAA;AACA;AACA;AACA;AACA;AACA;AACA;;AAEA;AACA;AACA;;AAIA,SAASA,QAAQA,CAAE;EAClBC,IAAI;EACJC,SAAS;EACTC,IAAI,GAAG,EAAE;EACTC,KAAK,GAAG,CAAC,CAAC;EACV,GAAGC;AACqD,CAAC,EAAG;EAC5D,MAAMC,SAAS,GAAG,CACjB,UAAU,EACV,WAAW,EACX,YAAY,GAAGL,IAAI,EACnBC,SAAS,CACT,CACCK,MAAM,CAAEC,OAAQ,CAAC,CACjBC,IAAI,CAAE,GAAI,CAAC;;EAEb;EACA,MAAMC,UAAU;EACf;EACA;EACA,EAAE,IAAIP,IAAI,GACP;IACAQ,QAAQ,EAAG,GAAGR,IAAM,IAAG;IACvBS,KAAK,EAAG,GAAGT,IAAM,IAAG;IACpBU,MAAM,EAAG,GAAGV,IAAM;EAClB,CAAC,GACD,CAAC,CAAC;EAEN,MAAMW,MAAM,GAAG;IACd,GAAGJ,UAAU;IACb,GAAGN;EACJ,CAAC;EAED,OAAOW,aAAA;IAAMb,SAAS,EAAGI,SAAW;IAACF,KAAK,EAAGU,MAAQ;IAAA,GAAMT;EAAU,CAAI,CAAC;AAC3E;AAEA,eAAeL,QAAQ"}

node_modules/@wordpress/components/build-module/dashicon/index.native.js

@@ -0,0 +1,23 @@
+import { createElement } from "react";
+/**
+ * WordPress dependencies
+ */
+import { Icon } from '@wordpress/components';
+
+/**
+ * Internal dependencies
+ */
+import * as dashicons from '../mobile/dashicons';
+
+// A predefined SVG icon is rendered instead of Dashicon because it's not supported in the native version.
+function Dashicon({
+  icon,
+  ...extraProps
+}) {
+  return createElement(Icon, {
+    icon: dashicons[icon] || dashicons.empty,
+    ...extraProps
+  });
+}
+export default Dashicon;
+//# sourceMappingURL=index.native.js.map

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

@@ -0,0 +1 @@
+{"version":3,"names":["Icon","dashicons","Dashicon","icon","extraProps","createElement","empty"],"sources":["@wordpress/components/src/dashicon/index.native.js"],"sourcesContent":["/**\n * WordPress dependencies\n */\nimport { Icon } from '@wordpress/components';\n\n/**\n * Internal dependencies\n */\nimport * as dashicons from '../mobile/dashicons';\n\n// A predefined SVG icon is rendered instead of Dashicon because it's not supported in the native version.\nfunction Dashicon( { icon, ...extraProps } ) {\n\treturn (\n\t\t<Icon icon={ dashicons[ icon ] || dashicons.empty } { ...extraProps } />\n\t);\n}\n\nexport default Dashicon;\n"],"mappings":";AAAA;AACA;AACA;AACA,SAASA,IAAI,QAAQ,uBAAuB;;AAE5C;AACA;AACA;AACA,OAAO,KAAKC,SAAS,MAAM,qBAAqB;;AAEhD;AACA,SAASC,QAAQA,CAAE;EAAEC,IAAI;EAAE,GAAGC;AAAW,CAAC,EAAG;EAC5C,OACCC,aAAA,CAACL,IAAI;IAACG,IAAI,EAAGF,SAAS,CAAEE,IAAI,CAAE,IAAIF,SAAS,CAACK,KAAO;IAAA,GAAMF;EAAU,CAAI,CAAC;AAE1E;AAEA,eAAeF,QAAQ"}

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

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