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/ratelimit.d.ts

@@ -0,0 +1,23 @@
+export declare type RateLimits = Record<string, number>;
+export declare const DEFAULT_RETRY_AFTER: number;
+/**
+ * Extracts Retry-After value from the request header or returns default value
+ * @param header string representation of 'Retry-After' header
+ * @param now current unix timestamp
+ *
+ */
+export declare function parseRetryAfterHeader(header: string, now?: number): number;
+/**
+ * Gets the time that given category is disabled until for rate limiting
+ */
+export declare function disabledUntil(limits: RateLimits, category: string): number;
+/**
+ * Checks if a category is rate limited
+ */
+export declare function isRateLimited(limits: RateLimits, category: string, now?: number): boolean;
+/**
+ * Update ratelimits from incoming headers.
+ * Returns true if headers contains a non-empty rate limiting header.
+ */
+export declare function updateRateLimits(limits: RateLimits, headers: Record<string, string | null | undefined>, now?: number): RateLimits;
+//# sourceMappingURL=ratelimit.d.ts.map