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-debounced-input/index.js

@@ -0,0 +1,26 @@
+/**
+ * WordPress dependencies
+ */
+import { useEffect, useState } from '@wordpress/element';
+
+/**
+ * Internal dependencies
+ */
+import useDebounce from '../use-debounce';
+
+/**
+ * Helper hook for input fields that need to debounce the value before using it.
+ *
+ * @param {any} defaultValue The default value to use.
+ * @return {[string, Function, string]} The input value, the setter and the debounced input value.
+ */
+export default function useDebouncedInput(defaultValue = '') {
+  const [input, setInput] = useState(defaultValue);
+  const [debouncedInput, setDebouncedState] = useState(defaultValue);
+  const setDebouncedInput = useDebounce(setDebouncedState, 250);
+  useEffect(() => {
+    setDebouncedInput(input);
+  }, [input]);
+  return [input, setInput, debouncedInput];
+}
+//# sourceMappingURL=index.js.map

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

@@ -0,0 +1 @@
+{"version":3,"names":["useEffect","useState","useDebounce","useDebouncedInput","defaultValue","input","setInput","debouncedInput","setDebouncedState","setDebouncedInput"],"sources":["@wordpress/compose/src/hooks/use-debounced-input/index.js"],"sourcesContent":["/**\n * WordPress dependencies\n */\nimport { useEffect, useState } from '@wordpress/element';\n\n/**\n * Internal dependencies\n */\nimport useDebounce from '../use-debounce';\n\n/**\n * Helper hook for input fields that need to debounce the value before using it.\n *\n * @param {any} defaultValue The default value to use.\n * @return {[string, Function, string]} The input value, the setter and the debounced input value.\n */\nexport default function useDebouncedInput( defaultValue = '' ) {\n\tconst [ input, setInput ] = useState( defaultValue );\n\tconst [ debouncedInput, setDebouncedState ] = useState( defaultValue );\n\n\tconst setDebouncedInput = useDebounce( setDebouncedState, 250 );\n\n\tuseEffect( () => {\n\t\tsetDebouncedInput( input );\n\t}, [ input ] );\n\n\treturn [ input, setInput, debouncedInput ];\n}\n"],"mappings":"AAAA;AACA;AACA;AACA,SAASA,SAAS,EAAEC,QAAQ,QAAQ,oBAAoB;;AAExD;AACA;AACA;AACA,OAAOC,WAAW,MAAM,iBAAiB;;AAEzC;AACA;AACA;AACA;AACA;AACA;AACA,eAAe,SAASC,iBAAiBA,CAAEC,YAAY,GAAG,EAAE,EAAG;EAC9D,MAAM,CAAEC,KAAK,EAAEC,QAAQ,CAAE,GAAGL,QAAQ,CAAEG,YAAa,CAAC;EACpD,MAAM,CAAEG,cAAc,EAAEC,iBAAiB,CAAE,GAAGP,QAAQ,CAAEG,YAAa,CAAC;EAEtE,MAAMK,iBAAiB,GAAGP,WAAW,CAAEM,iBAAiB,EAAE,GAAI,CAAC;EAE/DR,SAAS,CAAE,MAAM;IAChBS,iBAAiB,CAAEJ,KAAM,CAAC;EAC3B,CAAC,EAAE,CAAEA,KAAK,CAAG,CAAC;EAEd,OAAO,CAAEA,KAAK,EAAEC,QAAQ,EAAEC,cAAc,CAAE;AAC3C","ignoreList":[]}