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/dispose.js

@@ -0,0 +1,28 @@
+function dispose_SuppressedError(r, e) {
+  return "undefined" != typeof SuppressedError ? dispose_SuppressedError = SuppressedError : (dispose_SuppressedError = function dispose_SuppressedError(r, e) {
+    this.suppressed = e, this.error = r, this.stack = Error().stack;
+  }, dispose_SuppressedError.prototype = Object.create(Error.prototype, {
+    constructor: {
+      value: dispose_SuppressedError,
+      writable: !0,
+      configurable: !0
+    }
+  })), new dispose_SuppressedError(r, e);
+}
+function _dispose(r, e, s) {
+  function next() {
+    for (; r.length > 0;) try {
+      var o = r.pop(),
+        p = o.d.call(o.v);
+      if (o.a) return Promise.resolve(p).then(next, err);
+    } catch (r) {
+      return err(r);
+    }
+    if (s) throw e;
+  }
+  function err(r) {
+    return e = s ? new dispose_SuppressedError(e, r) : r, s = !0, next();
+  }
+  return next();
+}
+module.exports = _dispose, module.exports.__esModule = true, module.exports["default"] = module.exports;