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-debounce/index.js

@@ -0,0 +1,36 @@
+/**
+ * External dependencies
+ */
+import { useMemoOne } from 'use-memo-one';
+
+/**
+ * WordPress dependencies
+ */
+import { useEffect } from '@wordpress/element';
+
+/**
+ * Internal dependencies
+ */
+import { debounce } from '../../utils/debounce';
+
+/**
+ * Debounces a function similar to Lodash's `debounce`. A new debounced function will
+ * be returned and any scheduled calls cancelled if any of the arguments change,
+ * including the function to debounce, so please wrap functions created on
+ * render in components in `useCallback`.
+ *
+ * @see https://docs-lodash.com/v4/debounce/
+ *
+ * @template {(...args: any[]) => void} TFunc
+ *
+ * @param {TFunc}                                          fn        The function to debounce.
+ * @param {number}                                         [wait]    The number of milliseconds to delay.
+ * @param {import('../../utils/debounce').DebounceOptions} [options] The options object.
+ * @return {import('../../utils/debounce').DebouncedFunc<TFunc>} Debounced function.
+ */
+export default function useDebounce(fn, wait, options) {
+  const debounced = useMemoOne(() => debounce(fn, wait !== null && wait !== void 0 ? wait : 0, options), [fn, wait, options]);
+  useEffect(() => () => debounced.cancel(), [debounced]);
+  return debounced;
+}
+//# sourceMappingURL=index.js.map

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

@@ -0,0 +1 @@
+{"version":3,"names":["useMemoOne","useEffect","debounce","useDebounce","fn","wait","options","debounced","cancel"],"sources":["@wordpress/compose/src/hooks/use-debounce/index.js"],"sourcesContent":["/**\n * External dependencies\n */\nimport { useMemoOne } from 'use-memo-one';\n\n/**\n * WordPress dependencies\n */\nimport { useEffect } from '@wordpress/element';\n\n/**\n * Internal dependencies\n */\nimport { debounce } from '../../utils/debounce';\n\n/**\n * Debounces a function similar to Lodash's `debounce`. A new debounced function will\n * be returned and any scheduled calls cancelled if any of the arguments change,\n * including the function to debounce, so please wrap functions created on\n * render in components in `useCallback`.\n *\n * @see https://docs-lodash.com/v4/debounce/\n *\n * @template {(...args: any[]) => void} TFunc\n *\n * @param {TFunc}                                          fn        The function to debounce.\n * @param {number}                                         [wait]    The number of milliseconds to delay.\n * @param {import('../../utils/debounce').DebounceOptions} [options] The options object.\n * @return {import('../../utils/debounce').DebouncedFunc<TFunc>} Debounced function.\n */\nexport default function useDebounce( fn, wait, options ) {\n\tconst debounced = useMemoOne(\n\t\t() => debounce( fn, wait ?? 0, options ),\n\t\t[ fn, wait, options ]\n\t);\n\tuseEffect( () => () => debounced.cancel(), [ debounced ] );\n\treturn debounced;\n}\n"],"mappings":"AAAA;AACA;AACA;AACA,SAASA,UAAU,QAAQ,cAAc;;AAEzC;AACA;AACA;AACA,SAASC,SAAS,QAAQ,oBAAoB;;AAE9C;AACA;AACA;AACA,SAASC,QAAQ,QAAQ,sBAAsB;;AAE/C;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,eAAe,SAASC,WAAWA,CAAEC,EAAE,EAAEC,IAAI,EAAEC,OAAO,EAAG;EACxD,MAAMC,SAAS,GAAGP,UAAU,CAC3B,MAAME,QAAQ,CAAEE,EAAE,EAAEC,IAAI,aAAJA,IAAI,cAAJA,IAAI,GAAI,CAAC,EAAEC,OAAQ,CAAC,EACxC,CAAEF,EAAE,EAAEC,IAAI,EAAEC,OAAO,CACpB,CAAC;EACDL,SAAS,CAAE,MAAM,MAAMM,SAAS,CAACC,MAAM,CAAC,CAAC,EAAE,CAAED,SAAS,CAAG,CAAC;EAC1D,OAAOA,SAAS;AACjB","ignoreList":[]}