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/cliui/README.md

@@ -0,0 +1,141 @@
+# cliui
+
+![ci](https://github.com/yargs/cliui/workflows/ci/badge.svg)
+[![NPM version](https://img.shields.io/npm/v/cliui.svg)](https://www.npmjs.com/package/cliui)
+[![Conventional Commits](https://img.shields.io/badge/Conventional%20Commits-1.0.0-yellow.svg)](https://conventionalcommits.org)
+![nycrc config on GitHub](https://img.shields.io/nycrc/yargs/cliui)
+
+easily create complex multi-column command-line-interfaces.
+
+## Example
+
+```js
+const ui = require('cliui')()
+
+ui.div('Usage: $0 [command] [options]')
+
+ui.div({
+  text: 'Options:',
+  padding: [2, 0, 1, 0]
+})
+
+ui.div(
+  {
+    text: "-f, --file",
+    width: 20,
+    padding: [0, 4, 0, 4]
+  },
+  {
+    text: "the file to load." +
+      chalk.green("(if this description is long it wraps).")
+    ,
+    width: 20
+  },
+  {
+    text: chalk.red("[required]"),
+    align: 'right'
+  }
+)
+
+console.log(ui.toString())
+```
+
+## Deno/ESM Support
+
+As of `v7` `cliui` supports [Deno](https://github.com/denoland/deno) and
+[ESM](https://nodejs.org/api/esm.html#esm_ecmascript_modules):
+
+```typescript
+import cliui from "https://deno.land/x/cliui/deno.ts";
+
+const ui = cliui({})
+
+ui.div('Usage: $0 [command] [options]')
+
+ui.div({
+  text: 'Options:',
+  padding: [2, 0, 1, 0]
+})
+
+ui.div({
+  text: "-f, --file",
+  width: 20,
+  padding: [0, 4, 0, 4]
+})
+
+console.log(ui.toString())
+```
+
+<img width="500" src="screenshot.png">
+
+## Layout DSL
+
+cliui exposes a simple layout DSL:
+
+If you create a single `ui.div`, passing a string rather than an
+object:
+
+* `\n`: characters will be interpreted as new rows.
+* `\t`: characters will be interpreted as new columns.
+* `\s`: characters will be interpreted as padding.
+
+**as an example...**
+
+```js
+var ui = require('./')({
+  width: 60
+})
+
+ui.div(
+  'Usage: node ./bin/foo.js\n' +
+  '  <regex>\t  provide a regex\n' +
+  '  <glob>\t  provide a glob\t [required]'
+)
+
+console.log(ui.toString())
+```
+
+**will output:**
+
+```shell
+Usage: node ./bin/foo.js
+  <regex>  provide a regex
+  <glob>   provide a glob          [required]
+```
+
+## Methods
+
+```js
+cliui = require('cliui')
+```
+
+### cliui({width: integer})
+
+Specify the maximum width of the UI being generated.
+If no width is provided, cliui will try to get the current window's width and use it, and if that doesn't work, width will be set to `80`.
+
+### cliui({wrap: boolean})
+
+Enable or disable the wrapping of text in a column.
+
+### cliui.div(column, column, column)
+
+Create a row with any number of columns, a column
+can either be a string, or an object with the following
+options:
+
+* **text:** some text to place in the column.
+* **width:** the width of a column.
+* **align:** alignment, `right` or `center`.
+* **padding:** `[top, right, bottom, left]`.
+* **border:** should a border be placed around the div?
+
+### cliui.span(column, column, column)
+
+Similar to `div`, except the next row will be appended without
+a new line being created.
+
+### cliui.resetOutput()
+
+Resets the UI elements of the current cliui instance, maintaining the values
+set for `width` and `wrap`.