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/motion/features/animation/exit.mjs

@@ -0,0 +1,31 @@
+import { Feature } from '../Feature.mjs';
+
+let id = 0;
+class ExitAnimationFeature extends Feature {
+    constructor() {
+        super(...arguments);
+        this.id = id++;
+    }
+    update() {
+        if (!this.node.presenceContext)
+            return;
+        const { isPresent, onExitComplete, custom } = this.node.presenceContext;
+        const { isPresent: prevIsPresent } = this.node.prevPresenceContext || {};
+        if (!this.node.animationState || isPresent === prevIsPresent) {
+            return;
+        }
+        const exitAnimation = this.node.animationState.setActive("exit", !isPresent, { custom: custom !== null && custom !== void 0 ? custom : this.node.getProps().custom });
+        if (onExitComplete && !isPresent) {
+            exitAnimation.then(() => onExitComplete(this.id));
+        }
+    }
+    mount() {
+        const { register } = this.node.presenceContext || {};
+        if (register) {
+            this.unmount = register(this.id);
+        }
+    }
+    unmount() { }
+}
+
+export { ExitAnimationFeature };

node_modules/framer-motion/dist/es/motion/features/animation/index.mjs

@@ -0,0 +1,38 @@
+import { isAnimationControls } from '../../../animation/utils/is-animation-controls.mjs';
+import { createAnimationState } from '../../../render/utils/animation-state.mjs';
+import { Feature } from '../Feature.mjs';
+
+class AnimationFeature extends Feature {
+    /**
+     * We dynamically generate the AnimationState manager as it contains a reference
+     * to the underlying animation library. We only want to load that if we load this,
+     * so people can optionally code split it out using the `m` component.
+     */
+    constructor(node) {
+        super(node);
+        node.animationState || (node.animationState = createAnimationState(node));
+    }
+    updateAnimationControlsSubscription() {
+        const { animate } = this.node.getProps();
+        this.unmount();
+        if (isAnimationControls(animate)) {
+            this.unmount = animate.subscribe(this.node);
+        }
+    }
+    /**
+     * Subscribe any provided AnimationControls to the component's VisualElement
+     */
+    mount() {
+        this.updateAnimationControlsSubscription();
+    }
+    update() {
+        const { animate } = this.node.getProps();
+        const { animate: prevAnimate } = this.node.prevProps || {};
+        if (animate !== prevAnimate) {
+            this.updateAnimationControlsSubscription();
+        }
+    }
+    unmount() { }
+}
+
+export { AnimationFeature };