fix(config-editor): main entry exports methods object + load/unload (Cocos 3.8)

Root cause of 'Method does not exist / The methods of the module is undefined':
Cocos 3.8 expects handlers inside a 'methods' export (plus load/unload hooks),
not flat on module.exports. Handlers receive args directly (no event); return
value is the request reply. Verified vs official 3.8 first/messages docs.
Also: menu path + panel title switched to literal strings (i18n showed 'undefined').

extensions/pixelhero-config-editor/package.json

@@ -2,7 +2,7 @@
   "package_version": 2,
   "name": "pixelhero-config-editor",
   "version": "0.1.0",
-  "description": "i18n:pixelhero-config-editor.description",
+  "description": "英雄/技能配置编辑器",
   "main": "./dist/main.js",
   "author": "pixelhero",
   "editor": ">=3.8.0",
@@ -13,7 +13,7 @@
   },
   "panels": {
     "default": {
-      "title": "i18n:pixelhero-config-editor.title",
+      "title": "英雄/技能配置",
       "type": "dockable",
       "main": "./dist/panels/default.js",
       "size": { "width": 960, "height": 640, "min-width": 640, "min-height": 480 }
@@ -21,7 +21,7 @@
   },
   "contributions": {
     "menu": [
-      { "path": "i18n:menu.panel/英雄技能配置", "message": "open-panel" }
+      { "path": "PixelHero/英雄技能配置", "message": "open-panel" }
     ],
     "messages": {
       "open-panel": { "methods": ["open-panel"] },