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

deploy/content-security/namespace-label-note.yaml

@@ -0,0 +1,8 @@
+# ============================================================
+# Namespace label patch for tankwar
+# This adds the kubernetes.io/metadata.name label to the tankwar
+# namespace so that NetworkPolicy can reference it.
+# Apply: kubectl label namespace tankwar kubernetes.io/metadata.name=tankwar --overwrite
+# ============================================================
+# Note: Kubernetes 1.21+ automatically adds this label to namespaces.
+# Verify with: kubectl get namespace tankwar --show-labels