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/esm5/internal/util/argsArgArrayOrObject.js

@@ -0,0 +1,22 @@
+var isArray = Array.isArray;
+var getPrototypeOf = Object.getPrototypeOf, objectProto = Object.prototype, getKeys = Object.keys;
+export function argsArgArrayOrObject(args) {
+    if (args.length === 1) {
+        var first_1 = args[0];
+        if (isArray(first_1)) {
+            return { args: first_1, keys: null };
+        }
+        if (isPOJO(first_1)) {
+            var keys = getKeys(first_1);
+            return {
+                args: keys.map(function (key) { return first_1[key]; }),
+                keys: keys,
+            };
+        }
+    }
+    return { args: args, keys: null };
+}
+function isPOJO(obj) {
+    return obj && typeof obj === 'object' && getPrototypeOf(obj) === objectProto;
+}
+//# sourceMappingURL=argsArgArrayOrObject.js.map