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/entities/lib/generated/decode-data-html.d.ts

@@ -0,0 +1,3 @@
+declare const _default: Uint16Array;
+export default _default;
+//# sourceMappingURL=decode-data-html.d.ts.map

node_modules/entities/lib/generated/decode-data-html.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"decode-data-html.d.ts","sourceRoot":"https://raw.githubusercontent.com/fb55/entities/61afd4701eaa736978b13c7351cd3de9a96b04bc/src/","sources":["generated/decode-data-html.ts"],"names":[],"mappings":";AAEA,wBAKE"}

node_modules/entities/lib/generated/decode-data-html.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"decode-data-html.js","sourceRoot":"https://raw.githubusercontent.com/fb55/entities/61afd4701eaa736978b13c7351cd3de9a96b04bc/src/","sources":["generated/decode-data-html.ts"],"names":[],"mappings":";AAAA,8CAA8C;;AAE9C,kBAAe,IAAI,WAAW;AAC1B,kBAAkB;AAClB,268CAA268C;KACt68C,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,UAAC,CAAC,IAAK,OAAA,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,EAAf,CAAe,CAAC,CACnC,CAAC"}

node_modules/entities/lib/generated/decode-data-xml.d.ts

@@ -0,0 +1,3 @@
+declare const _default: Uint16Array;
+export default _default;
+//# sourceMappingURL=decode-data-xml.d.ts.map

node_modules/entities/lib/generated/decode-data-xml.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"decode-data-xml.d.ts","sourceRoot":"https://raw.githubusercontent.com/fb55/entities/61afd4701eaa736978b13c7351cd3de9a96b04bc/src/","sources":["generated/decode-data-xml.ts"],"names":[],"mappings":";AAEA,wBAKE"}

node_modules/entities/lib/generated/decode-data-xml.js

@@ -0,0 +1,9 @@
+"use strict";
+// Generated using scripts/write-decode-map.ts
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = new Uint16Array(
+// prettier-ignore
+"\u0200aglq\t\x15\x18\x1b\u026d\x0f\0\0\x12p;\u4026os;\u4027t;\u403et;\u403cuot;\u4022"
+    .split("")
+    .map(function (c) { return c.charCodeAt(0); }));
+//# sourceMappingURL=decode-data-xml.js.map

node_modules/entities/lib/generated/decode-data-xml.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"decode-data-xml.js","sourceRoot":"https://raw.githubusercontent.com/fb55/entities/61afd4701eaa736978b13c7351cd3de9a96b04bc/src/","sources":["generated/decode-data-xml.ts"],"names":[],"mappings":";AAAA,8CAA8C;;AAE9C,kBAAe,IAAI,WAAW;AAC1B,kBAAkB;AAClB,uFAAuF;KAClF,KAAK,CAAC,EAAE,CAAC;KACT,GAAG,CAAC,UAAC,CAAC,IAAK,OAAA,CAAC,CAAC,UAAU,CAAC,CAAC,CAAC,EAAf,CAAe,CAAC,CACnC,CAAC"}

node_modules/entities/lib/generated/encode-html.d.ts

@@ -0,0 +1,8 @@
+type EncodeTrieNode = string | {
+    v?: string;
+    n: number | Map<number, EncodeTrieNode>;
+    o?: string;
+};
+declare const _default: Map<number, EncodeTrieNode>;
+export default _default;
+//# sourceMappingURL=encode-html.d.ts.map

node_modules/entities/lib/generated/encode-html.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"encode-html.d.ts","sourceRoot":"https://raw.githubusercontent.com/fb55/entities/61afd4701eaa736978b13c7351cd3de9a96b04bc/src/","sources":["generated/encode-html.ts"],"names":[],"mappings":"AAEA,KAAK,cAAc,GACb,MAAM,GACN;IAAE,CAAC,CAAC,EAAE,MAAM,CAAC;IAAC,CAAC,EAAE,MAAM,GAAG,GAAG,CAAC,MAAM,EAAE,cAAc,CAAC,CAAC;IAAC,CAAC,CAAC,EAAE,MAAM,CAAA;CAAE,CAAC;;AAY1E,wBAAo+tB"}