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

js/i18n/en.js

@@ -30,6 +30,8 @@ module.exports = {
   'menu.skin': 'Skins',
   'menu.ranking': 'Ranking',
   'menu.settings': 'Settings',
+  'menu.profile': 'Profile',
+  'menu.chat': 'Chat',
 
   // ============================================================
   // Room Scene (PVP)
@@ -207,6 +209,7 @@ module.exports = {
   'settings.music': 'Music',
   'settings.vibration': 'Vibration',
   'settings.nickname': 'Display Name',
+  'settings.profile': 'Profile',
 
   // ============================================================
   // Shop Scene (Simplified)
@@ -226,6 +229,44 @@ module.exports = {
 
 
 
+  // ============================================================
+  // Profile Scene
+  // ============================================================
+  'profile.title': 'Profile',
+  'profile.nickname': 'Nickname',
+  'profile.signature': 'Signature',
+  'profile.description': 'Space Description',
+  'profile.changeAvatar': 'Change Avatar',
+  'profile.tapToEdit': 'Tap to edit',
+  'profile.save': 'Save',
+
+  // ============================================================
+  // Chat Room Scene
+  // ============================================================
+  'chat.title': 'Chat Room',
+  'chat.inputPlaceholder': 'Type a message...',
+  'chat.send': 'Send',
+  'chat.reportTitle': 'Report',
+  'chat.reportPolitics': 'Harmful politics',
+  'chat.reportPornography': 'Pornography',
+  'chat.reportGambling': 'Gambling & fraud',
+  'chat.reportOther': 'Other',
+  'chat.reportCancel': 'Cancel',
+
+  // ============================================================
+  // Content Security
+  // ============================================================
+  'contentSecurity.violation': 'Content contains prohibited information',
+  'contentSecurity.nicknameViolation': 'Nickname contains prohibited content',
+  'contentSecurity.chatViolation': 'Message failed: content violation',
+  'contentSecurity.muted': 'You cannot modify profile due to violation',
+  'contentSecurity.mutedChat': 'You are muted, remaining: {time}',
+  'contentSecurity.imageViolation': 'Image contains prohibited content',
+  'contentSecurity.checking': 'Checking...',
+  'contentSecurity.timeout': 'Check timeout, please retry',
+  'contentSecurity.reportSuccess': 'Report submitted',
+  'contentSecurity.reportFail': 'Report failed',
+
   // ============================================================
   // Ad System
   // ============================================================