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/prompts/lib/util/figures.js

@@ -0,0 +1,33 @@
+'use strict';	
+
+ const main = {
+  arrowUp: '↑',
+  arrowDown: '↓',
+  arrowLeft: '←',
+  arrowRight: '→',
+  radioOn: '◉',
+  radioOff: '◯',
+  tick: '✔',	
+  cross: '✖',	
+  ellipsis: '…',	
+  pointerSmall: '›',	
+  line: '─',	
+  pointer: '❯'	
+};	
+const win = {
+  arrowUp: main.arrowUp,
+  arrowDown: main.arrowDown,
+  arrowLeft: main.arrowLeft,
+  arrowRight: main.arrowRight,
+  radioOn: '(*)',
+  radioOff: '( )',	
+  tick: '√',	
+  cross: '×',	
+  ellipsis: '...',	
+  pointerSmall: '»',	
+  line: '─',	
+  pointer: '>'	
+};	
+const figures = process.platform === 'win32' ? win : main;	
+
+ module.exports = figures;