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/map-values/README.md

@@ -0,0 +1,17 @@
+# map-values
+
+Map object values returning a new object.
+
+# Example
+```js
+var map = require("map-values");
+map({ foo: 2 }, function(val, key, obj) {
+  return val * 2;
+});
+// -> { foo: 4 }
+```
+
+# Installation
+```
+npm install map-values
+```

node_modules/map-values/index.js

@@ -0,0 +1,13 @@
+"use strict";
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+module.exports = function(obj, map) {
+	var result = {};
+	for (var key in obj) {
+		if (hasOwnProperty.call(obj, key)) {
+			result[key] = map(obj[key], key, obj);
+		}
+	}
+	return result;
+};

node_modules/map-values/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "map-values",
+  "version": "1.0.1",
+  "description": "Map object values returning a new object",
+  "main": "index.js",
+  "scripts": {
+    "test": "node test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:parshap/js-map-values"
+  },
+  "keywords": [
+    "map",
+    "values",
+    "object"
+  ],
+  "author": "Parsha Pourkhomami",
+  "license": "Public Domain",
+  "devDependencies": {
+    "tape": "^2.10.2"
+  }
+}

node_modules/map-values/test.js

@@ -0,0 +1,14 @@
+"use strict";
+
+var test = require("tape");
+var assert = require("assert");
+var map = require("./");
+
+test("should map object", function(t) {
+	var obj = map({ foo: 2, bar: 5 }, function(val) {
+		return val * 2;
+	});
+	assert(Object.keys(obj).length === 2);
+	assert(obj.foo === 4);
+	assert(obj.bar === 10);
+});