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/rtlcss-webpack-plugin/dist/src/index.js

@@ -0,0 +1,94 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));
+
+var _path = _interopRequireDefault(require("path"));
+
+var _rtlcss = _interopRequireDefault(require("rtlcss"));
+
+var _webpack = _interopRequireDefault(require("webpack"));
+
+var isWebpack5 = parseInt(_webpack["default"].version, 10) === 5;
+
+var cssOnly = function cssOnly(filename) {
+  return _path["default"].extname(filename) === '.css';
+};
+
+var RtlCssPlugin = /*#__PURE__*/function () {
+  function RtlCssPlugin(options) {
+    var _this = this;
+
+    (0, _defineProperty2["default"])(this, "processAssets", function (compilation, callback) {
+      // webpack 5 turned this from an array to a set
+      var chunks = isWebpack5 ? Array.from(compilation.chunks) : compilation.chunks; // Explore each chunk (build output):
+
+      chunks.forEach(function (chunk) {
+        // Explore each asset filename generated by the chunk:
+        // webpack 5 turned this from an array to a set
+        var files = isWebpack5 ? Array.from(chunk.files) : chunk.files;
+        files.filter(cssOnly).forEach(function (filename) {
+          // Get the asset source for each file generated by the chunk:
+          var src = compilation.assets[filename].source();
+
+          var dst = _rtlcss["default"].process(src);
+
+          var dstFileName = compilation.getPath(_this.options.filename, {
+            chunk: chunk,
+            cssFileName: filename
+          });
+
+          if (isWebpack5) {
+            compilation.assets[dstFileName] = new _webpack["default"].sources.RawSource(dst);
+            chunk.files.add(dstFileName);
+          } else {
+            compilation.assets[dstFileName] = {
+              source: function source() {
+                return dst;
+              },
+              size: function size() {
+                return dst.length;
+              }
+            };
+            chunk.files.push(dstFileName);
+          }
+        });
+      });
+      callback();
+    });
+
+    if (typeof options === 'string') {
+      options = {
+        filename: options
+      };
+    }
+
+    this.options = options || {
+      filename: '[name].rtl.css'
+    };
+  }
+
+  var _proto = RtlCssPlugin.prototype;
+
+  _proto.apply = function apply(compiler) {
+    var _this2 = this;
+
+    if (isWebpack5) {
+      compiler.hooks.compilation.tap('RtlCssPlugin', function (compilation) {
+        compilation.hooks.processAssets.tapAsync({
+          name: 'TPAStylePlugin.pluginName',
+          stage: compilation.PROCESS_ASSETS_STAGE_OPTIMIZE
+        }, function (chunks, callback) {
+          return _this2.processAssets(compilation, callback);
+        });
+      });
+    } else {
+      compiler.hooks.emit.tapAsync('RtlCssPlugin', this.processAssets);
+    }
+  };
+
+  return RtlCssPlugin;
+}();
+
+module.exports = RtlCssPlugin;