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/utils/strings.js

@@ -0,0 +1,117 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.escapeRegExp = escapeRegExp;
+exports.kebabCase = kebabCase;
+exports.normalizeTextString = void 0;
+var _removeAccents = _interopRequireDefault(require("remove-accents"));
+var _changeCase = require("change-case");
+/**
+ * External dependencies
+ */
+
+const ALL_UNICODE_DASH_CHARACTERS = new RegExp(`[${[
+// - (hyphen-minus)
+'\u002d',
+// ~ (tilde)
+'\u007e',
+// ­ (soft hyphen)
+'\u00ad',
+// ֊ (armenian hyphen)
+'\u058a',
+// ־ (hebrew punctuation maqaf)
+'\u05be',
+// ᐀ (canadian syllabics hyphen)
+'\u1400',
+// ᠆ (mongolian todo soft hyphen)
+'\u1806',
+// ‐ (hyphen)
+'\u2010',
+// non-breaking hyphen)
+'\u2011',
+// ‒ (figure dash)
+'\u2012',
+// – (en dash)
+'\u2013',
+// — (em dash)
+'\u2014',
+// ― (horizontal bar)
+'\u2015',
+// ⁓ (swung dash)
+'\u2053',
+// superscript minus)
+'\u207b',
+// subscript minus)
+'\u208b',
+// − (minus sign)
+'\u2212',
+// ⸗ (double oblique hyphen)
+'\u2e17',
+// ⸺ (two-em dash)
+'\u2e3a',
+// ⸻ (three-em dash)
+'\u2e3b',
+// 〜 (wave dash)
+'\u301c',
+// 〰 (wavy dash)
+'\u3030',
+// ゠ (katakana-hiragana double hyphen)
+'\u30a0',
+// ︱ (presentation form for vertical em dash)
+'\ufe31',
+// ︲ (presentation form for vertical en dash)
+'\ufe32',
+// ﹘ (small em dash)
+'\ufe58',
+// ﹣ (small hyphen-minus)
+'\ufe63',
+// － (fullwidth hyphen-minus)
+'\uff0d'].join('')}]`, 'g');
+const normalizeTextString = value => {
+  return (0, _removeAccents.default)(value).toLocaleLowerCase().replace(ALL_UNICODE_DASH_CHARACTERS, '-');
+};
+
+/**
+ * Converts any string to kebab case.
+ * Backwards compatible with Lodash's `_.kebabCase()`.
+ * Backwards compatible with `_wp_to_kebab_case()`.
+ *
+ * @see https://lodash.com/docs/4.17.15#kebabCase
+ * @see https://developer.wordpress.org/reference/functions/_wp_to_kebab_case/
+ *
+ * @param str String to convert.
+ * @return Kebab-cased string
+ */
+exports.normalizeTextString = normalizeTextString;
+function kebabCase(str) {
+  var _str$toString;
+  let input = (_str$toString = str?.toString?.()) !== null && _str$toString !== void 0 ? _str$toString : '';
+
+  // See https://github.com/lodash/lodash/blob/b185fcee26b2133bd071f4aaca14b455c2ed1008/lodash.js#L4970
+  input = input.replace(/['\u2019]/, '');
+  return (0, _changeCase.paramCase)(input, {
+    splitRegexp: [/(?!(?:1ST|2ND|3RD|[4-9]TH)(?![a-z]))([a-z0-9])([A-Z])/g,
+    // fooBar => foo-bar, 3Bar => 3-bar
+    /(?!(?:1st|2nd|3rd|[4-9]th)(?![a-z]))([0-9])([a-z])/g,
+    // 3bar => 3-bar
+    /([A-Za-z])([0-9])/g,
+    // Foo3 => foo-3, foo3 => foo-3
+    /([A-Z])([A-Z][a-z])/g // FOOBar => foo-bar
+    ]
+  });
+}
+
+/**
+ * Escapes the RegExp special characters.
+ *
+ * @param string Input string.
+ *
+ * @return Regex-escaped string.
+ */
+function escapeRegExp(string) {
+  return string.replace(/[\\^$.*+?()[\]{}|]/g, '\\$&');
+}
+//# sourceMappingURL=strings.js.map