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-syntax-jsx/lib/index.js

@@ -0,0 +1,21 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _default = exports.default = (0, _helperPluginUtils.declare)(api => {
+  api.assertVersion("^7.0.0-0 || ^8.0.0-0");
+  return {
+    name: "syntax-jsx",
+    manipulateOptions(opts, parserOpts) {
+      if (parserOpts.plugins.some(p => (Array.isArray(p) ? p[0] : p) === "typescript")) {
+        return;
+      }
+      parserOpts.plugins.push("jsx");
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map

node_modules/@babel/plugin-syntax-jsx/lib/index.js.map

@@ -0,0 +1 @@
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