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/framer-motion/dist/es/value/scroll/use-element-scroll.mjs

@@ -0,0 +1,14 @@
+import { warnOnce } from '../../utils/warn-once.mjs';
+import { useScroll } from '../use-scroll.mjs';
+
+/**
+ * @deprecated useElementScroll is deprecated. Convert to useScroll({ container: ref })
+ */
+function useElementScroll(ref) {
+    if (process.env.NODE_ENV === "development") {
+        warnOnce(false, "useElementScroll is deprecated. Convert to useScroll({ container: ref }).");
+    }
+    return useScroll({ container: ref });
+}
+
+export { useElementScroll };

node_modules/framer-motion/dist/es/value/scroll/use-viewport-scroll.mjs

@@ -0,0 +1,14 @@
+import { warnOnce } from '../../utils/warn-once.mjs';
+import { useScroll } from '../use-scroll.mjs';
+
+/**
+ * @deprecated useViewportScroll is deprecated. Convert to useScroll()
+ */
+function useViewportScroll() {
+    if (process.env.NODE_ENV !== "production") {
+        warnOnce(false, "useViewportScroll is deprecated. Convert to useScroll().");
+    }
+    return useScroll();
+}
+
+export { useViewportScroll };