Add comprehensive messenger features and improvements

- Backend improvements: flexible user authentication, nullable fields
- Frontend enhancements: new screens (NewMessage, UserInfo), improved UI/UX
- Chat functionality: real-time messaging with polling, message actions
- Visual upgrades: gradient backgrounds, better themes, modern design
- Added project documentation (CLAUDE.md) and development guidelines

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/package.json

@@ -20,6 +20,7 @@
     "expo-linear-gradient": "~14.1.5",
     "expo-status-bar": "~2.2.3",
     "graphql": "^16.11.0",
+    "graphql-ws": "^6.0.6",
     "react": "19.0.0",
     "react-dom": "19.0.0",
     "react-native": "0.79.5",
@@ -29,9 +30,9 @@
     "react-native-reanimated": "~3.17.4",
     "react-native-safe-area-context": "5.4.0",
     "react-native-screens": "~4.11.1",
+    "react-native-svg": "15.11.2",
     "react-native-vector-icons": "^10.3.0",
-    "react-native-web": "^0.20.0",
-    "react-native-svg": "15.11.2"
+    "react-native-web": "^0.20.0"
   },
   "devDependencies": {
     "@babel/core": "^7.25.2",