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/comment-parser/lib/primitives.cjs.map

@@ -0,0 +1 @@
+{"version":3,"sources":["primitives.js"],"names":["Object","defineProperty","exports","value","Markers"],"mappings":"AAAA;;AACAA,MAAM,CAACC,cAAP,CAAsBC,OAAtB,EAA+B,YAA/B,EAA6C;AAAEC,EAAAA,KAAK,EAAE;AAAT,CAA7C;AACAD,OAAO,CAACE,OAAR,GAAkB,KAAK,CAAvB;AACA;;AACA,IAAIA,OAAJ;;AACA,CAAC,UAAUA,OAAV,EAAmB;AAChBA,EAAAA,OAAO,CAAC,OAAD,CAAP,GAAmB,KAAnB;AACAA,EAAAA,OAAO,CAAC,SAAD,CAAP,GAAqB,MAArB;AACAA,EAAAA,OAAO,CAAC,OAAD,CAAP,GAAmB,GAAnB;AACAA,EAAAA,OAAO,CAAC,KAAD,CAAP,GAAiB,IAAjB;AACH,CALD,EAKGA,OAAO,GAAGF,OAAO,CAACE,OAAR,KAAoBF,OAAO,CAACE,OAAR,GAAkB,EAAtC,CALb","sourcesContent":["\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nexports.Markers = void 0;\n/** @deprecated */\nvar Markers;\n(function (Markers) {\n    Markers[\"start\"] = \"/**\";\n    Markers[\"nostart\"] = \"/***\";\n    Markers[\"delim\"] = \"*\";\n    Markers[\"end\"] = \"*/\";\n})(Markers = exports.Markers || (exports.Markers = {}));\n"],"file":"primitives.cjs"}