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/@babel/plugin-transform-unicode-regex/lib/index.js

@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperCreateRegexpFeaturesPlugin = require("@babel/helper-create-regexp-features-plugin");
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion(7);
+  return (0, _helperCreateRegexpFeaturesPlugin.createRegExpFeaturePlugin)({
+    name: "transform-unicode-regex",
+    feature: "unicodeFlag"
+  });
+});
+
+//# sourceMappingURL=index.js.map

node_modules/@babel/plugin-transform-unicode-regex/lib/index.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["_helperCreateRegexpFeaturesPlugin","require","_helperPluginUtils","_default","exports","default","declare","api","assertVersion","createRegExpFeaturePlugin","name","feature"],"sources":["../src/index.ts"],"sourcesContent":["/* eslint-disable @babel/development/plugin-name */\nimport { createRegExpFeaturePlugin } from \"@babel/helper-create-regexp-features-plugin\";\nimport { declare } from \"@babel/helper-plugin-utils\";\n\nexport default declare(api => {\n  api.assertVersion(REQUIRED_VERSION(7));\n\n  return createRegExpFeaturePlugin({\n    name: \"transform-unicode-regex\",\n    feature: \"unicodeFlag\",\n  });\n});\n"],"mappings":";;;;;;AACA,IAAAA,iCAAA,GAAAC,OAAA;AACA,IAAAC,kBAAA,GAAAD,OAAA;AAAqD,IAAAE,QAAA,GAAAC,OAAA,CAAAC,OAAA,GAEtC,IAAAC,0BAAO,EAACC,GAAG,IAAI;EAC5BA,GAAG,CAACC,aAAa,CAAkB,CAAE,CAAC;EAEtC,OAAO,IAAAC,2DAAyB,EAAC;IAC/BC,IAAI,EAAE,yBAAyB;IAC/BC,OAAO,EAAE;EACX,CAAC,CAAC;AACJ,CAAC,CAAC","ignoreList":[]}