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/@es-joy/jsdoccomment/dist/parseComment.d.ts

@@ -0,0 +1,34 @@
+export function hasSeeWithLink(spec: import('comment-parser').Spec): boolean;
+export const defaultNoTypes: string[];
+export const defaultNoNames: string[];
+/**
+ * Can't import `comment-parser/es6/parser/tokenizers/index.js`,
+ *   so we redefine here.
+ */
+export type CommentParserTokenizer = (spec: import('comment-parser').Spec) => import('comment-parser').Spec;
+/**
+ * Can't import `comment-parser/es6/parser/tokenizers/index.js`,
+ *   so we redefine here.
+ * @typedef {(spec: import('comment-parser').Spec) =>
+ *   import('comment-parser').Spec} CommentParserTokenizer
+ */
+/**
+ * @param {object} [cfg]
+ * @param {string[]} [cfg.noTypes]
+ * @param {string[]} [cfg.noNames]
+ * @returns {CommentParserTokenizer[]}
+ */
+export function getTokenizers({ noTypes, noNames }?: {
+    noTypes?: string[] | undefined;
+    noNames?: string[] | undefined;
+} | undefined): CommentParserTokenizer[];
+/**
+ * Accepts a comment token and converts it into `comment-parser` AST.
+ * @param {{value: string}} commentNode
+ * @param {string} [indent] Whitespace
+ * @returns {import('./index.js').JsdocBlockWithInline}
+ */
+export function parseComment(commentNode: {
+    value: string;
+}, indent?: string | undefined): import('./index.js').JsdocBlockWithInline;
+//# sourceMappingURL=parseComment.d.ts.map