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/reakit/ts/Id/Id.d.ts

@@ -0,0 +1,32 @@
+import * as React from "react";
+import { RoleHTMLProps } from "../Role/Role";
+import { unstable_IdStateReturn } from "./IdState";
+export declare type unstable_IdOptions = Pick<Partial<unstable_IdStateReturn>, "baseId" | "unstable_idCountRef"> & {
+    /**
+     * Same as the HTML attribute.
+     */
+    id?: string;
+};
+export declare type unstable_IdHTMLProps = RoleHTMLProps;
+export declare type unstable_IdProps = unstable_IdOptions & unstable_IdHTMLProps;
+export declare const unstable_useId: {
+    (options?: unstable_IdOptions | undefined, htmlProps?: RoleHTMLProps | undefined, unstable_ignoreUseOptions?: boolean | undefined): RoleHTMLProps;
+    unstable_propsAreEqual: (prev: Pick<Partial<unstable_IdStateReturn>, "baseId" | "unstable_idCountRef"> & {
+        /**
+         * Same as the HTML attribute.
+         */
+        id?: string | undefined;
+    } & React.HTMLAttributes<any> & React.RefAttributes<any> & {
+        wrapElement?: ((element: React.ReactNode) => React.ReactNode) | undefined;
+    }, next: Pick<Partial<unstable_IdStateReturn>, "baseId" | "unstable_idCountRef"> & {
+        /**
+         * Same as the HTML attribute.
+         */
+        id?: string | undefined;
+    } & React.HTMLAttributes<any> & React.RefAttributes<any> & {
+        wrapElement?: ((element: React.ReactNode) => React.ReactNode) | undefined;
+    }) => boolean;
+    __keys: readonly any[];
+    __useOptions: (options: unstable_IdOptions, htmlProps: RoleHTMLProps) => unstable_IdOptions;
+};
+export declare const unstable_Id: import("reakit-system/ts/createComponent").Component<"div", unstable_IdOptions>;

node_modules/reakit/ts/Id/IdProvider.d.ts

@@ -0,0 +1,8 @@
+import * as React from "react";
+import { generateRandomString } from "./__utils";
+export declare type unstable_IdProviderProps = {
+    children: React.ReactNode;
+    prefix?: string;
+};
+export declare const unstable_IdContext: React.Context<typeof generateRandomString>;
+export declare function unstable_IdProvider({ children, prefix, }: unstable_IdProviderProps): JSX.Element;

node_modules/reakit/ts/Id/IdState.d.ts

@@ -0,0 +1,21 @@
+import * as React from "react";
+import { SealedInitialState } from "reakit-utils/useSealedState";
+export declare type unstable_IdState = {
+    /**
+     * ID that will serve as a base for all the items IDs.
+     */
+    baseId: string;
+    /**
+     * @private
+     */
+    unstable_idCountRef: React.MutableRefObject<number>;
+};
+export declare type unstable_IdActions = {
+    /**
+     * Sets `baseId`.
+     */
+    setBaseId: React.Dispatch<React.SetStateAction<string>>;
+};
+export declare type unstable_IdInitialState = Partial<Pick<unstable_IdState, "baseId">>;
+export declare type unstable_IdStateReturn = unstable_IdState & unstable_IdActions;
+export declare function unstable_useIdState(initialState?: SealedInitialState<unstable_IdInitialState>): unstable_IdStateReturn;

node_modules/reakit/ts/Id/__keys.d.ts

@@ -0,0 +1 @@
+export declare const ID_KEYS: readonly ["baseId", "unstable_idCountRef", "setBaseId", "id"];

node_modules/reakit/ts/Id/__utils.d.ts

@@ -0,0 +1,2 @@
+export declare const defaultPrefix = "id";
+export declare function generateRandomString(prefix?: string): string;

node_modules/reakit/ts/Id/index.d.ts

@@ -0,0 +1,3 @@
+export * from "./Id";
+export * from "./IdProvider";
+export * from "./IdState";