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/date-fns/locale/fy/_lib/localize/index.js

@@ -0,0 +1,94 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _index = _interopRequireDefault(require("../../../_lib/buildLocalizeFn/index.js"));
+var eraValues = {
+  narrow: ['f.K.', 'n.K.'],
+  abbreviated: ['f.Kr.', 'n.Kr.'],
+  wide: ['foar Kristus', 'nei Kristus']
+};
+var quarterValues = {
+  narrow: ['1', '2', '3', '4'],
+  abbreviated: ['K1', 'K2', 'K3', 'K4'],
+  wide: ['1e fearnsjier', '2e fearnsjier', '3e fearnsjier', '4e fearnsjier']
+};
+var monthValues = {
+  narrow: ['j', 'f', 'm', 'a', 'm', 'j', 'j', 'a', 's', 'o', 'n', 'd'],
+  abbreviated: ['jan.', 'feb.', 'mrt.', 'apr.', 'mai.', 'jun.', 'jul.', 'aug.', 'sep.', 'okt.', 'nov.', 'des.'],
+  wide: ['jannewaris', 'febrewaris', 'maart', 'april', 'maaie', 'juny', 'july', 'augustus', 'septimber', 'oktober', 'novimber', 'desimber']
+};
+var dayValues = {
+  narrow: ['s', 'm', 't', 'w', 't', 'f', 's'],
+  short: ['si', 'mo', 'ti', 'wo', 'to', 'fr', 'so'],
+  abbreviated: ['snein', 'moa', 'tii', 'woa', 'ton', 'fre', 'sneon'],
+  wide: ['snein', 'moandei', 'tiisdei', 'woansdei', 'tongersdei', 'freed', 'sneon']
+};
+var dayPeriodValues = {
+  narrow: {
+    am: 'AM',
+    pm: 'PM',
+    midnight: 'middernacht',
+    noon: 'middei',
+    morning: 'moarns',
+    afternoon: 'middeis',
+    evening: 'jûns',
+    night: 'nachts'
+  },
+  abbreviated: {
+    am: 'AM',
+    pm: 'PM',
+    midnight: 'middernacht',
+    noon: 'middei',
+    morning: 'moarns',
+    afternoon: 'middeis',
+    evening: 'jûns',
+    night: 'nachts'
+  },
+  wide: {
+    am: 'AM',
+    pm: 'PM',
+    midnight: 'middernacht',
+    noon: 'middei',
+    morning: 'moarns',
+    afternoon: 'middeis',
+    evening: 'jûns',
+    night: 'nachts'
+  }
+};
+var ordinalNumber = function ordinalNumber(dirtyNumber, _options) {
+  var number = Number(dirtyNumber);
+  return number + 'e';
+};
+var localize = {
+  ordinalNumber: ordinalNumber,
+  era: (0, _index.default)({
+    values: eraValues,
+    defaultWidth: 'wide'
+  }),
+  quarter: (0, _index.default)({
+    values: quarterValues,
+    defaultWidth: 'wide',
+    argumentCallback: function argumentCallback(quarter) {
+      return quarter - 1;
+    }
+  }),
+  month: (0, _index.default)({
+    values: monthValues,
+    defaultWidth: 'wide'
+  }),
+  day: (0, _index.default)({
+    values: dayValues,
+    defaultWidth: 'wide'
+  }),
+  dayPeriod: (0, _index.default)({
+    values: dayPeriodValues,
+    defaultWidth: 'wide'
+  })
+};
+var _default = localize;
+exports.default = _default;
+module.exports = exports.default;