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/uri-js/dist/esnext/index.js

@@ -0,0 +1,17 @@
+import { SCHEMES } from "./uri";
+import http from "./schemes/http";
+SCHEMES[http.scheme] = http;
+import https from "./schemes/https";
+SCHEMES[https.scheme] = https;
+import ws from "./schemes/ws";
+SCHEMES[ws.scheme] = ws;
+import wss from "./schemes/wss";
+SCHEMES[wss.scheme] = wss;
+import mailto from "./schemes/mailto";
+SCHEMES[mailto.scheme] = mailto;
+import urn from "./schemes/urn";
+SCHEMES[urn.scheme] = urn;
+import uuid from "./schemes/urn-uuid";
+SCHEMES[uuid.scheme] = uuid;
+export * from "./uri";
+//# sourceMappingURL=index.js.map