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/@sentry/utils/dist/stacktrace.d.ts

@@ -0,0 +1,21 @@
+import { StackFrame } from '@sentry/types';
+export declare type StackParser = (stack: string, skipFirst?: number) => StackFrame[];
+export declare type StackLineParserFn = (line: string) => StackFrame | undefined;
+export declare type StackLineParser = [number, StackLineParserFn];
+/**
+ * Creates a stack parser with the supplied line parsers
+ *
+ * StackFrames are returned in the correct order for Sentry Exception
+ * frames and with Sentry SDK internal frames removed from the top and bottom
+ *
+ */
+export declare function createStackParser(...parsers: StackLineParser[]): StackParser;
+/**
+ * @hidden
+ */
+export declare function stripSentryFramesAndReverse(stack: StackFrame[]): StackFrame[];
+/**
+ * Safely extract function name from itself
+ */
+export declare function getFunctionName(fn: unknown): string;
+//# sourceMappingURL=stacktrace.d.ts.map