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/reakit/Menu/Menu/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/Menu",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/Menu",
+  "module": "../../es/Menu/Menu",
+  "types": "../../ts/Menu/Menu"
+}

node_modules/reakit/Menu/MenuArrow/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuArrow",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuArrow",
+  "module": "../../es/Menu/MenuArrow",
+  "types": "../../ts/Menu/MenuArrow"
+}

node_modules/reakit/Menu/MenuBar/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuBar",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuBar",
+  "module": "../../es/Menu/MenuBar",
+  "types": "../../ts/Menu/MenuBar"
+}

node_modules/reakit/Menu/MenuBarState/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuBarState",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuBarState",
+  "module": "../../es/Menu/MenuBarState",
+  "types": "../../ts/Menu/MenuBarState"
+}

node_modules/reakit/Menu/MenuButton/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuButton",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuButton",
+  "module": "../../es/Menu/MenuButton",
+  "types": "../../ts/Menu/MenuButton"
+}

node_modules/reakit/Menu/MenuDisclosure/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuDisclosure",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuDisclosure",
+  "module": "../../es/Menu/MenuDisclosure",
+  "types": "../../ts/Menu/MenuDisclosure"
+}

node_modules/reakit/Menu/MenuGroup/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuGroup",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuGroup",
+  "module": "../../es/Menu/MenuGroup",
+  "types": "../../ts/Menu/MenuGroup"
+}

node_modules/reakit/Menu/MenuItem/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuItem",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuItem",
+  "module": "../../es/Menu/MenuItem",
+  "types": "../../ts/Menu/MenuItem"
+}

node_modules/reakit/Menu/MenuItemCheckbox/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuItemCheckbox",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuItemCheckbox",
+  "module": "../../es/Menu/MenuItemCheckbox",
+  "types": "../../ts/Menu/MenuItemCheckbox"
+}

node_modules/reakit/Menu/MenuItemRadio/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuItemRadio",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuItemRadio",
+  "module": "../../es/Menu/MenuItemRadio",
+  "types": "../../ts/Menu/MenuItemRadio"
+}

node_modules/reakit/Menu/MenuSeparator/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuSeparator",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuSeparator",
+  "module": "../../es/Menu/MenuSeparator",
+  "types": "../../ts/Menu/MenuSeparator"
+}

node_modules/reakit/Menu/MenuState/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu/MenuState",
+  "private": true,
+  "sideEffects": false,
+  "main": "../../lib/Menu/MenuState",
+  "module": "../../es/Menu/MenuState",
+  "types": "../../ts/Menu/MenuState"
+}

node_modules/reakit/Menu/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "reakit/Menu",
+  "private": true,
+  "sideEffects": false,
+  "main": "../lib/Menu",
+  "module": "../es/Menu",
+  "types": "../ts/Menu"
+}