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/animation/sequence/utils/calc-time.mjs

@@ -0,0 +1,21 @@
+/**
+ * Given a absolute or relative time definition and current/prev time state of the sequence,
+ * calculate an absolute time for the next keyframes.
+ */
+function calcNextTime(current, next, prev, labels) {
+    var _a;
+    if (typeof next === "number") {
+        return next;
+    }
+    else if (next.startsWith("-") || next.startsWith("+")) {
+        return Math.max(0, current + parseFloat(next));
+    }
+    else if (next === "<") {
+        return prev;
+    }
+    else {
+        return (_a = labels.get(next)) !== null && _a !== void 0 ? _a : current;
+    }
+}
+
+export { calcNextTime };

node_modules/framer-motion/dist/es/animation/sequence/utils/edit.mjs

@@ -0,0 +1,31 @@
+import { getEasingForSegment } from '../../../easing/utils/get-easing-for-segment.mjs';
+import { removeItem } from '../../../utils/array.mjs';
+import { mix } from '../../../utils/mix.mjs';
+
+function eraseKeyframes(sequence, startTime, endTime) {
+    for (let i = 0; i < sequence.length; i++) {
+        const keyframe = sequence[i];
+        if (keyframe.at > startTime && keyframe.at < endTime) {
+            removeItem(sequence, keyframe);
+            // If we remove this item we have to push the pointer back one
+            i--;
+        }
+    }
+}
+function addKeyframes(sequence, keyframes, easing, offset, startTime, endTime) {
+    /**
+     * Erase every existing value between currentTime and targetTime,
+     * this will essentially splice this timeline into any currently
+     * defined ones.
+     */
+    eraseKeyframes(sequence, startTime, endTime);
+    for (let i = 0; i < keyframes.length; i++) {
+        sequence.push({
+            value: keyframes[i],
+            at: mix(startTime, endTime, offset[i]),
+            easing: getEasingForSegment(easing, i),
+        });
+    }
+}
+
+export { addKeyframes, eraseKeyframes };

node_modules/framer-motion/dist/es/animation/sequence/utils/sort.mjs

@@ -0,0 +1,14 @@
+function compareByTime(a, b) {
+    if (a.at === b.at) {
+        if (a.value === null)
+            return 1;
+        if (b.value === null)
+            return -1;
+        return 0;
+    }
+    else {
+        return a.at - b.at;
+    }
+}
+
+export { compareByTime };