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/faye-websocket/package.json

@@ -0,0 +1,35 @@
+{
+          "name": "faye-websocket",
+          "description": "Standards-compliant WebSocket server and client",
+          "homepage": "https://github.com/faye/faye-websocket-node",
+          "author": "James Coglan <jcoglan@gmail.com> (http://jcoglan.com/)",
+          "keywords": [
+                    "websocket",
+                    "eventsource"
+          ],
+          "license": "Apache-2.0",
+          "version": "0.11.4",
+          "engines": {
+                    "node": ">=0.8.0"
+          },
+          "files": [
+                    "lib"
+          ],
+          "main": "./lib/faye/websocket",
+          "dependencies": {
+                    "websocket-driver": ">=0.5.1"
+          },
+          "devDependencies": {
+                    "jstest": "*",
+                    "pace": "*",
+                    "permessage-deflate": "*"
+          },
+          "scripts": {
+                    "test": "jstest spec/runner.js"
+          },
+          "repository": {
+                    "type": "git",
+                    "url": "git://github.com/faye/faye-websocket-node.git"
+          },
+          "bugs": "https://github.com/faye/faye-websocket-node/issues"
+}