Merge feature/add_skin into master: resolve all conflicts

- GameGlobal.js: keep upstream SERVER_URL with /ws suffix
- en.js/zh.js: merge both settings.nickname and settings.profile keys
- SettingsScene.js: keep both nickname row and profile button
- server/index.js: merge express app + content security proxy with
  noServer WebSocket mode and path validation
- Add .gitignore for node_modules and .codebuddy

server/package.json

@@ -5,9 +5,12 @@
   "main": "index.js",
   "scripts": {
     "start": "node index.js",
-    "dev": "node index.js"
+    "dev": "node index.js",
+    "test": "node --test test/"
   },
   "dependencies": {
+    "express": "^5.2.1",
+    "multer": "^2.1.1",
     "ws": "^8.16.0"
   }
 }