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/@bcoe/v8-coverage/tsconfig.json

@@ -0,0 +1,59 @@
+{
+  "compilerOptions": {
+    "allowJs": false,
+    "allowSyntheticDefaultImports": true,
+    "allowUnreachableCode": false,
+    "allowUnusedLabels": false,
+    "alwaysStrict": true,
+    "charset": "utf8",
+    "checkJs": false,
+    "declaration": false,
+    "disableSizeLimit": false,
+    "downlevelIteration": false,
+    "emitBOM": false,
+    "emitDecoratorMetadata": true,
+    "esModuleInterop": true,
+    "experimentalDecorators": true,
+    "forceConsistentCasingInFileNames": true,
+    "importHelpers": false,
+    "inlineSourceMap": false,
+    "inlineSources": false,
+    "isolatedModules": false,
+    "lib": [
+      "es2017",
+      "esnext.asynciterable"
+    ],
+    "locale": "en-us",
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "newLine": "lf",
+    "noEmit": false,
+    "noEmitHelpers": false,
+    "noEmitOnError": true,
+    "noErrorTruncation": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "noStrictGenericChecks": false,
+    "noUnusedLocals": true,
+    "noUnusedParameters": false,
+    "noImplicitUseStrict": false,
+    "noLib": false,
+    "noResolve": false,
+    "preserveConstEnums": false,
+    "removeComments": false,
+    "skipLibCheck": true,
+    "sourceMap": true,
+    "strict": true,
+    "strictNullChecks": true,
+    "suppressExcessPropertyErrors": false,
+    "suppressImplicitAnyIndexErrors": false,
+    "target": "es2017",
+    "traceResolution": false,
+    "typeRoots": [
+      "src/lib/custom-typings",
+      "node_modules/@types"
+    ]
+  }
+}