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

content-security-service/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "content-security-service",
+  "version": "1.0.0",
+  "description": "Content security microservice for UGC moderation (WeChat msgSecCheck/imgSecCheck)",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js",
+    "dev": "node index.js",
+    "test": "node --test test/"
+  },
+  "dependencies": {
+    "express": "^5.2.1",
+    "multer": "^2.1.1"
+  }
+}