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/rxjs/dist/cjs/webSocket/index.js

@@ -0,0 +1,8 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.WebSocketSubject = exports.webSocket = void 0;
+var webSocket_1 = require("../internal/observable/dom/webSocket");
+Object.defineProperty(exports, "webSocket", { enumerable: true, get: function () { return webSocket_1.webSocket; } });
+var WebSocketSubject_1 = require("../internal/observable/dom/WebSocketSubject");
+Object.defineProperty(exports, "WebSocketSubject", { enumerable: true, get: function () { return WebSocketSubject_1.WebSocketSubject; } });
+//# sourceMappingURL=index.js.map

node_modules/rxjs/dist/cjs/webSocket/index.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../../../src/webSocket/index.ts"],"names":[],"mappings":";;;AAAA,kEAA8E;AAArE,sGAAA,SAAS,OAAa;AAC/B,gFAAuG;AAA9F,oHAAA,gBAAgB,OAAA"}