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/@wordpress/components/build-module/text/styles/emotion-css.native.js

@@ -0,0 +1,6 @@
+/**
+ * External dependencies
+ */
+import { css } from '@emotion/native';
+export default css;
+//# sourceMappingURL=emotion-css.native.js.map

node_modules/@wordpress/components/build-module/text/styles/emotion-css.native.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["css"],"sources":["@wordpress/components/src/text/styles/emotion-css.native.js"],"sourcesContent":["/**\n * External dependencies\n */\nimport { css } from '@emotion/native';\n\nexport default css;\n"],"mappings":"AAAA;AACA;AACA;AACA,SAASA,GAAG,QAAQ,iBAAiB;AAErC,eAAeA,GAAG"}

node_modules/@wordpress/components/build-module/text/styles/font-family.native.js

@@ -0,0 +1,2 @@
+export const fontFamily = '';
+//# sourceMappingURL=font-family.native.js.map

node_modules/@wordpress/components/build-module/text/styles/font-family.native.js.map

@@ -0,0 +1 @@
+{"version":3,"names":["fontFamily"],"sources":["@wordpress/components/src/text/styles/font-family.native.js"],"sourcesContent":["export const fontFamily = '';\n"],"mappings":"AAAA,OAAO,MAAMA,UAAU,GAAG,EAAE"}

node_modules/@wordpress/components/build-module/text/styles/text-mixins.native.js

@@ -0,0 +1,143 @@
+/**
+ * Internal dependencies
+ */
+import { fontFamily } from './font-family';
+import css from './emotion-css';
+import { COLORS } from '../../utils/colors-values';
+const fontWeightNormal = `font-weight: 400;`;
+const fontWeightMedium = `font-weight: 500;`;
+const fontWeightSemibold = `font-weight: 600;`;
+const title = `
+  ${fontWeightNormal}
+`;
+const titleLarge = `
+	font-size: 32px;
+	line-height: 40px;
+`;
+const titleMedium = `
+	font-size: 24px;
+	line-height: 32px;
+`;
+const titleSmall = `
+	font-size: 20px;
+	line-height: 28px;
+`;
+const subtitle = `
+	${fontWeightSemibold}
+	font-size: 14px;
+	line-height: 20px;
+`;
+const subtitleLarge = `
+	font-size: 16px;
+	line-height: 24px;
+`;
+const subtitleSmall = `
+	font-size: 14px;
+	line-height: 20px;
+`;
+const body = `
+	${fontWeightNormal}
+`;
+const bodyLarge = `
+	font-size: 16px;
+	line-height: 24px;
+`;
+const bodySmall = `
+	font-size: 14px;
+	line-height: 20px;
+`;
+const button = `
+  ${fontWeightSemibold}
+  font-size: 14px;
+  line-height: 20px;
+`;
+const caption = `
+	${fontWeightNormal}
+	font-size: 12px;
+	line-height: 16px;
+`;
+const label = `
+	${fontWeightSemibold}
+	font-size: 12px;
+	line-height: 16px;
+`;
+const sectionHeading = `
+	${fontWeightMedium}
+	font-size: 11px;
+	line-height: 1.4;
+	text-transform: uppercase;
+	color: ${COLORS.gray[700]}
+`;
+
+/**
+ * @typedef {'title.large'|'title.medium'|'title.small'|'subtitle'|'subtitle.small'|'body'|'body.large'|'body.small'|'button'|'caption'|'label'|'sectionheading'} TextVariant
+ */
+
+/**
+ * @param {TextVariant} variantName
+ */
+const variant = (variantName = 'body') => {
+  switch (variantName) {
+    case 'title.large':
+      return css`
+				${title}
+				${titleLarge}
+			`;
+    case 'title.medium':
+      return css`
+				${title}
+				${titleMedium}
+			`;
+    case 'title.small':
+      return css`
+				${title}
+				${titleSmall}
+			`;
+    case 'subtitle':
+      return css`
+				${subtitle}
+				${subtitleLarge}
+			`;
+    case 'subtitle.small':
+      return css`
+				${subtitle}
+				${subtitleSmall}
+			`;
+    case 'body':
+      return css`
+				${body}
+			`;
+    case 'body.large':
+      return css`
+				${body}
+				${bodyLarge}
+			`;
+    case 'body.small':
+      return css`
+				${body}
+				${bodySmall}
+			`;
+    case 'button':
+      return button;
+    case 'caption':
+      return caption;
+    case 'label':
+      return label;
+    case 'sectionheading':
+      return sectionHeading;
+  }
+};
+
+/**
+ * @typedef {Object} TextProps
+ * @property {TextVariant} variant one of TextVariant to be used
+ */
+
+/**
+ * @param {TextProps} props
+ */
+export const text = props => css`
+	${fontFamily}
+	${variant(props.variant)}
+`;
+//# sourceMappingURL=text-mixins.native.js.map