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/compose/build-module/hooks/use-disabled/index.js

@@ -0,0 +1,82 @@
+/**
+ * Internal dependencies
+ */
+import { debounce } from '../../utils/debounce';
+import useRefEffect from '../use-ref-effect';
+
+/**
+ * In some circumstances, such as block previews, all focusable DOM elements
+ * (input fields, links, buttons, etc.) need to be disabled. This hook adds the
+ * behavior to disable nested DOM elements to the returned ref.
+ *
+ * If you can, prefer the use of the inert HTML attribute.
+ *
+ * @param {Object}   config            Configuration object.
+ * @param {boolean=} config.isDisabled Whether the element should be disabled.
+ * @return {import('react').RefCallback<HTMLElement>} Element Ref.
+ *
+ * @example
+ * ```js
+ * import { useDisabled } from '@wordpress/compose';
+ *
+ * const DisabledExample = () => {
+ * 	const disabledRef = useDisabled();
+ *	return (
+ *		<div ref={ disabledRef }>
+ *			<a href="#">This link will have tabindex set to -1</a>
+ *			<input placeholder="This input will have the disabled attribute added to it." type="text" />
+ *		</div>
+ *	);
+ * };
+ * ```
+ */
+export default function useDisabled({
+  isDisabled: isDisabledProp = false
+} = {}) {
+  return useRefEffect(node => {
+    if (isDisabledProp) {
+      return;
+    }
+    const defaultView = node?.ownerDocument?.defaultView;
+    if (!defaultView) {
+      return;
+    }
+
+    /** A variable keeping track of the previous updates in order to restore them. */
+    const updates = [];
+    const disable = () => {
+      node.childNodes.forEach(child => {
+        if (!(child instanceof defaultView.HTMLElement)) {
+          return;
+        }
+        if (!child.getAttribute('inert')) {
+          child.setAttribute('inert', 'true');
+          updates.push(() => {
+            child.removeAttribute('inert');
+          });
+        }
+      });
+    };
+
+    // Debounce re-disable since disabling process itself will incur
+    // additional mutations which should be ignored.
+    const debouncedDisable = debounce(disable, 0, {
+      leading: true
+    });
+    disable();
+
+    /** @type {MutationObserver | undefined} */
+    const observer = new window.MutationObserver(debouncedDisable);
+    observer.observe(node, {
+      childList: true
+    });
+    return () => {
+      if (observer) {
+        observer.disconnect();
+      }
+      debouncedDisable.cancel();
+      updates.forEach(update => update());
+    };
+  }, [isDisabledProp]);
+}
+//# sourceMappingURL=index.js.map

node_modules/@wordpress/compose/build-module/hooks/use-disabled/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["debounce","useRefEffect","useDisabled","isDisabled","isDisabledProp","node","defaultView","ownerDocument","updates","disable","childNodes","forEach","child","HTMLElement","getAttribute","setAttribute","push","removeAttribute","debouncedDisable","leading","observer","window","MutationObserver","observe","childList","disconnect","cancel","update"],"sources":["@wordpress/compose/src/hooks/use-disabled/index.ts"],"sourcesContent":["/**\n * Internal dependencies\n */\nimport { debounce } from '../../utils/debounce';\nimport useRefEffect from '../use-ref-effect';\n\n/**\n * In some circumstances, such as block previews, all focusable DOM elements\n * (input fields, links, buttons, etc.) need to be disabled. This hook adds the\n * behavior to disable nested DOM elements to the returned ref.\n *\n * If you can, prefer the use of the inert HTML attribute.\n *\n * @param {Object}   config            Configuration object.\n * @param {boolean=} config.isDisabled Whether the element should be disabled.\n * @return {import('react').RefCallback<HTMLElement>} Element Ref.\n *\n * @example\n * ```js\n * import { useDisabled } from '@wordpress/compose';\n *\n * const DisabledExample = () => {\n * \tconst disabledRef = useDisabled();\n *\treturn (\n *\t\t<div ref={ disabledRef }>\n *\t\t\t<a href=\"#\">This link will have tabindex set to -1</a>\n *\t\t\t<input placeholder=\"This input will have the disabled attribute added to it.\" type=\"text\" />\n *\t\t</div>\n *\t);\n * };\n * ```\n */\nexport default function useDisabled( {\n\tisDisabled: isDisabledProp = false,\n} = {} ) {\n\treturn useRefEffect(\n\t\t( node ) => {\n\t\t\tif ( isDisabledProp ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tconst defaultView = node?.ownerDocument?.defaultView;\n\t\t\tif ( ! defaultView ) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\t/** A variable keeping track of the previous updates in order to restore them. */\n\t\t\tconst updates: Function[] = [];\n\t\t\tconst disable = () => {\n\t\t\t\tnode.childNodes.forEach( ( child ) => {\n\t\t\t\t\tif ( ! ( child instanceof defaultView.HTMLElement ) ) {\n\t\t\t\t\t\treturn;\n\t\t\t\t\t}\n\t\t\t\t\tif ( ! child.getAttribute( 'inert' ) ) {\n\t\t\t\t\t\tchild.setAttribute( 'inert', 'true' );\n\t\t\t\t\t\tupdates.push( () => {\n\t\t\t\t\t\t\tchild.removeAttribute( 'inert' );\n\t\t\t\t\t\t} );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t};\n\n\t\t\t// Debounce re-disable since disabling process itself will incur\n\t\t\t// additional mutations which should be ignored.\n\t\t\tconst debouncedDisable = debounce( disable, 0, {\n\t\t\t\tleading: true,\n\t\t\t} );\n\t\t\tdisable();\n\n\t\t\t/** @type {MutationObserver | undefined} */\n\t\t\tconst observer = new window.MutationObserver( debouncedDisable );\n\t\t\tobserver.observe( node, {\n\t\t\t\tchildList: true,\n\t\t\t} );\n\n\t\t\treturn () => {\n\t\t\t\tif ( observer ) {\n\t\t\t\t\tobserver.disconnect();\n\t\t\t\t}\n\t\t\t\tdebouncedDisable.cancel();\n\t\t\t\tupdates.forEach( ( update ) => update() );\n\t\t\t};\n\t\t},\n\t\t[ isDisabledProp ]\n\t);\n}\n"],"mappings":"AAAA;AACA;AACA;AACA,SAASA,QAAQ,QAAQ,sBAAsB;AAC/C,OAAOC,YAAY,MAAM,mBAAmB;;AAE5C;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,eAAe,SAASC,WAAWA,CAAE;EACpCC,UAAU,EAAEC,cAAc,GAAG;AAC9B,CAAC,GAAG,CAAC,CAAC,EAAG;EACR,OAAOH,YAAY,CAChBI,IAAI,IAAM;IACX,IAAKD,cAAc,EAAG;MACrB;IACD;IAEA,MAAME,WAAW,GAAGD,IAAI,EAAEE,aAAa,EAAED,WAAW;IACpD,IAAK,CAAEA,WAAW,EAAG;MACpB;IACD;;IAEA;IACA,MAAME,OAAmB,GAAG,EAAE;IAC9B,MAAMC,OAAO,GAAGA,CAAA,KAAM;MACrBJ,IAAI,CAACK,UAAU,CAACC,OAAO,CAAIC,KAAK,IAAM;QACrC,IAAK,EAAIA,KAAK,YAAYN,WAAW,CAACO,WAAW,CAAE,EAAG;UACrD;QACD;QACA,IAAK,CAAED,KAAK,CAACE,YAAY,CAAE,OAAQ,CAAC,EAAG;UACtCF,KAAK,CAACG,YAAY,CAAE,OAAO,EAAE,MAAO,CAAC;UACrCP,OAAO,CAACQ,IAAI,CAAE,MAAM;YACnBJ,KAAK,CAACK,eAAe,CAAE,OAAQ,CAAC;UACjC,CAAE,CAAC;QACJ;MACD,CAAE,CAAC;IACJ,CAAC;;IAED;IACA;IACA,MAAMC,gBAAgB,GAAGlB,QAAQ,CAAES,OAAO,EAAE,CAAC,EAAE;MAC9CU,OAAO,EAAE;IACV,CAAE,CAAC;IACHV,OAAO,CAAC,CAAC;;IAET;IACA,MAAMW,QAAQ,GAAG,IAAIC,MAAM,CAACC,gBAAgB,CAAEJ,gBAAiB,CAAC;IAChEE,QAAQ,CAACG,OAAO,CAAElB,IAAI,EAAE;MACvBmB,SAAS,EAAE;IACZ,CAAE,CAAC;IAEH,OAAO,MAAM;MACZ,IAAKJ,QAAQ,EAAG;QACfA,QAAQ,CAACK,UAAU,CAAC,CAAC;MACtB;MACAP,gBAAgB,CAACQ,MAAM,CAAC,CAAC;MACzBlB,OAAO,CAACG,OAAO,CAAIgB,MAAM,IAAMA,MAAM,CAAC,CAAE,CAAC;IAC1C,CAAC;EACF,CAAC,EACD,CAAEvB,cAAc,CACjB,CAAC;AACF","ignoreList":[]}