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/eslint-plugin-react/lib/util/componentUtil.d.ts

@@ -0,0 +1,46 @@
+/**
+ * @param {ASTNode} node
+ * @param {Context} context
+ * @returns {boolean}
+ */
+export function isES5Component(node: ASTNode, context: Context): boolean;
+/**
+ * @param {ASTNode} node
+ * @param {Context} context
+ * @returns {boolean}
+ */
+export function isES6Component(node: ASTNode, context: Context): boolean;
+/**
+ * Get the parent ES5 component node from the current scope
+ * @param {Context} context
+ * @param {ASTNode} node
+ * @returns {ASTNode|null}
+ */
+export function getParentES5Component(context: Context, node: ASTNode): ASTNode | null;
+/**
+ * Get the parent ES6 component node from the current scope
+ * @param {Context} context
+ * @param {ASTNode} node
+ * @returns {ASTNode | null}
+ */
+export function getParentES6Component(context: Context, node: ASTNode): ASTNode | null;
+/**
+ * Check if the node is explicitly declared as a descendant of a React Component
+ * @param {any} node
+ * @param {Context} context
+ * @returns {boolean}
+ */
+export function isExplicitComponent(node: any, context: Context): boolean;
+/**
+ * Checks if a component extends React.PureComponent
+ * @param {ASTNode} node
+ * @param {Context} context
+ * @returns {boolean}
+ */
+export function isPureComponent(node: ASTNode, context: Context): boolean;
+/**
+ * @param {ASTNode} node
+ * @returns {boolean}
+ */
+export function isStateMemberExpression(node: ASTNode): boolean;
+//# sourceMappingURL=componentUtil.d.ts.map