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/runtime/helpers/esm/setFunctionName.js

@@ -0,0 +1,12 @@
+import _typeof from "./typeof.js";
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+export { setFunctionName as default };