feat(electron): separate dev/uat build targets with isolated update channels

- Add build.dev.json to override publish.url for dev environment
- Add build:dev and build:uat scripts; each sets its own feed URL
- copy-to-nas.js now accepts env argument; outputs to
  electron-update/{dev|uat}/ locally and on NAS
- docker-compose volume mounts updated to serve from env subdirs
- Remove stale artifacts from electron-update root

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

electron/package.json

@@ -1,14 +1,18 @@
 {
   "name": "gamegroup-electron",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Game Group V2 桌面客户端",
   "main": "main.js",
   "scripts": {
     "start": "electron .",
     "start:dev": "electron . --env=dev",
     "start:uat": "electron . --env=uat",
-    "build": "electron-builder --win && node scripts/copy-to-nas.js",
-    "build:portable": "electron-builder --win portable && node scripts/copy-to-nas.js",
+    "bump": "node scripts/bump-version.js",
+    "bump:minor": "node scripts/bump-version.js minor",
+    "bump:major": "node scripts/bump-version.js major",
+    "build:dev": "node scripts/bump-version.js && electron-builder --win --config scripts/build.dev.json && node scripts/copy-to-nas.js dev",
+    "build:uat": "node scripts/bump-version.js && electron-builder --win && node scripts/copy-to-nas.js uat",
+    "build:portable": "node scripts/bump-version.js && electron-builder --win portable && node scripts/copy-to-nas.js uat",
     "copy-to-nas": "node scripts/copy-to-nas.js"
   },
   "dependencies": {
@@ -31,7 +35,9 @@
       "target": [
         {
           "target": "nsis",
-          "arch": ["x64"]
+          "arch": [
+            "x64"
+          ]
         }
       ],
       "icon": "build/icon.ico"